Search Results: "conjugate acid- pairs | acids bases | chemistry | khan academy"

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07:14 Popular
Calculating internal energy and work example | Chemistry | Khan Academy

1,095 views / 0 likes - added 6 years ago

Worked example calculating the change in internal energy for a gas using the first law of thermodynamics. Watch the next lesson: https://www.khanacademy.org/science/chemistry/thermodynamics-chemistry/internal-energy-sal/v/specific-heat-and-latent-leat-of-
01:11 Popular
Subtracting Decimals: Example 1 | Decimals | Pre-Algebra | Khan Academy

1,093 views / 1 likes - added 8 years ago

Subtracting decimals...up to the hundredths placement. Line up those decimals before you start. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-algebra/decimals-pre-alg/adding-decimals-pre-alg/e/subtracting
09:36 Popular
Alkenes&Alkynes - Crash Course Chemistry #41

1,092 views / 0 likes - added 9 years ago

You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Also, if you can afford to pay a little every month, it really helps us to continue producing great content.
05:10 Popular
Reflexive pronouns | The parts of speech | Grammar | Khan Academy

1,088 views / 0 likes - added 6 years ago

We use reflexive pronouns (like "herself" and "ourselves") when the subject and the object of a sentence are the same thing. David, KA's Grammar Fellow, explains. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/gra
04:34 Popular
Radical And Rational Equations — Harder Example | Math | New SAT | Khan Academy

1,086 views / 0 likes - added 8 years ago

Watch Sal work through a harder Radical and rational equations problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/v/sat-math-p9-easier?utm_source=YT&utm_medium=Desc&utm_campaign
09:52 Popular
Boiling Water - Periodic Table Of Videos

1,085 views / 0 likes - added 9 years ago

Original Everest video: http://www.youtube.com/watch?v=JTL4dj3Gx1o This video features Martyn Poliakoff, Samantha Tang and Neil Barnes. Thanks to Buddhi Rai and Chandra Rai for all theri help with the Everest boiling. More chemistry at http://www.periodic
01:07 Popular
How To Match Function Input To Output Given The Graph (example) | Algebra I | Khan Academy

1,084 views / 0 likes - added 8 years ago

Sal finds the input value for which g(x)=-2 given the graph of g. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/algebra/algebra-functions/function-inputs-and-outputs/e/functions_matching_inputs_outputs?utm_so
01:36 Popular
Polynomial Factors And Graphs — Basic Example | Math | New SAT | Khan Academy

1,082 views / 0 likes - added 8 years ago

Watch Sal work through a basic Polynomial factors and graphs problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/v/sat-math-p11-harder?utm_source=YT&utm_medium=Desc&utm_campaign=
09:29 Popular
Dividing Decimals With Hundredths Example 3 | Decimals | Pre-Algebra | Khan Academy

1,082 views / 0 likes - added 8 years ago

The old saying is "practice makes perfect." Let's keep practicing dividing decimals and making our divisor a whole number. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-algebra/decimals-pre-alg/dividing-d
04:53 Popular
What Ever Happened To Acid Rain?

1,081 views / 4 likes - added 7 years ago

In the 1970s, everyone was talking about the dangers of acid rain, but it seems to have fallen off the radar. What happened to acid rain? Get 15% off http://www.domain.com's domain names and web hosting when you use coupon code DNEWS at checkout! What Eve
02:00 Popular
What is a pronoun? | The parts of speech | Grammar | Khan Academy

1,078 views / 0 likes - added 6 years ago

Pronouns are words that can replace nouns, like the way "it" replaces "elephant" in "I looked at the elephant. It was grey." Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/partsofspeech/the-pronoun/e/the-q
03:12 Popular
Subtracting Hundreds, Tens, And Ones | Early Math | Khan Academy

1,072 views / 0 likes - added 8 years ago

Learn how to subtract three-digit numbers by subtracting ones, tens, and hundreds. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-add-sub-100/cc-early-math-sub-ones-tens-hundreds/e/sub
01:59 Popular
ACID BLAST | Melting a UNICORN in Acid?!?

1,070 views / 0 likes - added 6 years ago

What happens when you pour ACID onto a UNICORN made out of sponge? NICK'S CHANNEL ►► https://www.youtube.com/user/NickUhas Hosted by Nick Uhas Twitter: http://www.twitter.com/nickuhas Instagram: http://www.instagram.com/nickuhas Facebook: http://www.faceb
02:48 Popular
Intro To Articles | Modifiers | The Parts Of Speech

1,069 views / 0 likes - added 8 years ago

Articles—words like the, a, and an—are special adjectives we use to indicate whether a noun is specific or not specific. David, Khan Academy's resident grammarian, explains.
06:07 Popular
History Vs. Genghis Khan - Alex Gendler

1,068 views / 0 likes - added 8 years ago

View full lesson: http://ed.ted.com/lessons/history-vs-genghis-khan-alex-gendler He was one of the most fearsome warlords who ever lived, waging an unstoppable conquest across the Eurasian continent. But was Genghis Khan a vicious barbarian or a unifier w
03:42 Popular
Manipulating Quadratic And Exponential Expressions — Basic Example | Math | New SAT | Khan Academy

1,063 views / 0 likes - added 8 years ago

Watch Sal work through a basic Manipulating quadratic and exponential expressions problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/v/sat-math-p2-harder?utm_source=YT&utm_mediu
03:49 Popular
Meet The Prepositions | Prepositions | The Parts Of Speech | Grammar

1,060 views / 1 likes - added 8 years ago

Prepositions help show us where things are in space and time. Practice this yourself on Khan Academy right now: http://www.khanacademy.org/the-preposition/e/meet-the-preposition Watch the next lesson: https://www.youtube.com/watch?v=96sojEZsKu8 The parts
09:42 Popular
The History of Atomic Chemistry: Crash Course Chemistry #37

1,056 views / 0 likes - added 9 years ago

You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Also, if you can afford to pay a little every month, it really helps us to continue producing great content.
02:27 Popular
Checking Ordered Pair Solutions To Equations Example 2 | Algebra I | Khan Academy

1,055 views / 0 likes - added 8 years ago

Second example of ordered pair solutions Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/algebra/two-var-linear-equations-and-intro-to-functions/solutions-to-two-var-linear-equations/e/plugging_in_values?utm_so
02:28 Popular
Drawing Line Of Reflection | Transformations | Geometry | Khan Academy

1,052 views / 0 likes - added 8 years ago

Drawing line of reflection Watch the next lesson: https://www.khanacademy.org/math/geometry/transformations/hs-geo-reflections/v/determining-the-line-of-reflection?utm_source=YT&utm_medium=Desc&utm_campaign=Geometry Missed the previous lesson? https://www
05:25 Popular
Complex Numbers — Harder Example | Math | New SAT | Khan Academy

1,047 views / 0 likes - added 8 years ago

Watch Sal work through a harder Complex numbers problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-tips-planning/new-sat-about-sat/v/walk-through-sat-practice-platform?utm_source=YT&utm_medium=Desc&utm_campaign=NewSAT Mi
02:32 Popular
Comparing Fractions Visually With Pies | Fractions | 4th Grade | Khan Academy

1,044 views / 0 likes - added 8 years ago

Comparing fractions visually with pies Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/cc-fourth-grade-math/cc-4th-fractions-topic/cc-4th-comparing-fractions-visually/e/visually-comparing-fractions?utm_source=Y
02:27 Popular
Inequality Word Problem: One Variable | Applying Mathematical Reasoning | Pre-Algebra | Khan Academy

1,043 views / 0 likes - added 8 years ago

This time we're creating a variable to represent a number, and then writing an inequality. We're building on our knowledge. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-algebra/applying-math-reasoning-to
02:11 Popular
Ratios, Rates, And Proportions — Basic Example | Math | New SAT | Khan Academy

1,041 views / 0 likes - added 8 years ago

Watch Sal work through a basic Ratios, rates, and proportions problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-problem-solving-data-analysis/v/sat-math-q1-harder?utm_source=YT&utm_medium=Desc&utm_campaign=
02:36 Popular
Number Patterns: Seeing Relationships | Applying Mathematical Reasoning | Pre-Algebra | Khan Academy

1,041 views / 0 likes - added 8 years ago

Laying the foundation for algebraic thinking by learning to recognize the relationships between patterns and graphing out those relationships. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-algebra/applyin
01:22 Popular
Table Data — Basic Example | Math | New SAT | Khan Academy

1,038 views / 0 likes - added 8 years ago

Watch Sal work through a basic Table data problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-problem-solving-data-analysis/v/sat-math-q7-harder?utm_source=YT&utm_medium=Desc&utm_campaign=NewSAT Missed the pr
03:59 Popular
Volume Word Problems — Basic Example | Math | New SAT | Khan Academy

1,037 views / 0 likes - added 8 years ago

Watch Sal work through a basic Volume word problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/v/sat-math-s1-harder?utm_source=YT&utm_medium=Desc&utm_campaign=NewSAT Missed the previous
02:48 Popular
Adding In Binary | Applying Mathematical Reasoning | Pre-Algebra | Khan Academy

1,037 views / 0 likes - added 8 years ago

Watch the next lesson: https://www.khanacademy.org/math/pre-algebra/applying-math-reasoning-topic/alternate-number-bases/v/binary-multiplication?utm_source=YT&utm_medium=Desc&utm_campaign=PreAlgebra Missed the previous lesson? https://www.khanacademy.org/
04:37 Popular
Fraction-decimal Intuition Problems (examples) | 4th Grade | Khan Academy

1,035 views / 0 likes - added 8 years ago

Understand the connection between decimals and fractions using a grid diagram. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/cc-fourth-grade-math/cc-4th-decimals/cc-4th-decimal-fractions/e/fraction-decimal-in
02:53 Popular
The truly irregular verbs | The parts of speech | Grammar | Khan Academy

1,034 views / 0 likes - added 6 years ago

Some irregular verbs just won't be categorized. They don't fit into neat little boxes. These are those verbs. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/partsofspeech/grammar-verbs/e/intro-to-irregular
02:03 Popular
Comparing Numbers Of Objects | Counting | Early Math | Khan Academy

1,030 views / 1 likes - added 8 years ago

Learn what "more than" and "less than" mean. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-counting-topic/cc-early-math-comparing-numbers/e/compare-groups-through-10?utm_source=YT&utm
02:36 Popular
Understanding Place Value When Adding Ones | Early Math | Khan Academy

1,027 views / 0 likes - added 8 years ago

Learn how to add 37 + 2 by thinking about place value. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-add-sub-100/cc-early-math-add-ones-tens/e/add-within-100--level-1?utm_source=YT&ut
10:46 Popular
Polar&Non-Polar Molecules: Crash Course Chemistry #23

1,024 views / 1 likes - added 9 years ago

*** PLEASE WATCH WITH ANNOTATIONS ON! SOME INACCURACIES IN GRAPHICS ARE NOTED AND CORRECTED IN ANNOTATIONS. THANKS! *** Molecules come in infinite varieties, so in order to help the complicated chemical world make a little more sense, we classify and cate
02:50 Popular
Complex Numbers — Basic Example | Math | New SAT | Khan Academy

1,023 views / 0 likes - added 8 years ago

Watch Sal work through a basic Complex numbers problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/v/sat-math-s3-harder?utm_source=YT&utm_medium=Desc&utm_campaign=NewSAT Missed the prev
09:40 Popular
Quadratic And Exponential Word Problems — Harder Example | Math | New SAT | Khan Academy

1,023 views / 0 likes - added 8 years ago

Watch Sal work through a harder Quadratic and exponential word problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/v/sat-math-p2-easier?utm_source=YT&utm_medium=Desc&utm_campaign
11:41 Popular
Buffers, the Acid Rain Slayer: Crash Course Chemistry #31

1,022 views / 2 likes - added 9 years ago

You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Also, if you can afford to pay a little every month, it really helps us to continue producing great content.
03:45 Popular
Angles, Arc Lengths, And Trig Functions — Harder Example | Math | New SAT | Khan Academy

1,021 views / 0 likes - added 8 years ago

Watch Sal work through a harder Angles, arc lengths, and trig functions problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/v/sat-math-s5-easier?utm_source=YT&utm_medium=Desc&utm_campai
03:12 Popular
Correlative conjunctions | The parts of speech | Grammar | Khan Academy

1,015 views / 0 likes - added 6 years ago

Correlative conjunctions work in pairs to connect parts of sentences. David teaches you how they do it! Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/partsofspeech/conjunctions/e/correlative-conjuntions?u
03:27 Popular
How To Evaluate Expressions In Two Variables With Decimals And Fractions | 6th Grade | Khan Academy

1,014 views / 0 likes - added 8 years ago

Learn how to evaluate expressions that have two different variables in them by using a technique called substitution (or "plugging in"). Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6t
04:23 Popular
Fizzy Soda Experiment!

1,014 views / 0 likes - added 8 years ago

You're just in time to help Jessi and Squeaks with their baking soda and vinegar experiment! Then, stick around to learn all about chemists, special scientists who study chemicals! ---------- Like SciShow? Want to help support us, and also get things to p
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05:06 Popular
How do Microbes Survive in Stomach Acid? - Monthly Mailbag #12

1,014 views / 0 likes - added 6 years ago

There is increasing evidence on how our gut microbiome plays an integral role in our overall health, but how do microbes even survive the stomach when the acids and enzymes attack everything that reaches it? Jon answers questions from the comment section.
01:40 Popular
How To Match Function Input To Output Given The Formula (example) | Algebra I | Khan Academy

1,012 views / 0 likes - added 8 years ago

Sal finds the input value for which f(t)=13, given that f(t)=-2t+5. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/algebra/algebra-functions/function-inputs-and-outputs/e/functions_matching_inputs_outputs?utm_
05:59 Popular
Introduction To Place Value | Place Value (tens And Hundreds) | Early Math | Khan Academy

1,012 views / 1 likes - added 8 years ago

Learn why we use a "ones place" and a "tens place" when writing numbers. This video uses the number 37 as an example. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-place-value-topic/c
01:46 Popular
Movie Ticket Proportionality | 7th Grade | Khan Academy

1,008 views / 0 likes - added 8 years ago

When going to the movies, is the price you pay proportional to the number of tickets you buy? Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/cc-seventh-grade-math/cc-7th-ratio-proportion/cc-7th-proportional-re
04:32 Popular
The Science of Spotting Fake Foods – Speaking of Chemistry

1,002 views / 0 likes - added 7 years ago

Food fraud often boils down to politics or semantics. Something labeled parmesan cheese may not come from Parma, for instance. But sometimes food producers try to feed us cheap fillers and other lies. In this episode of Speaking of Chemistry, Sophia Cai e
02:34 Popular
Adding Two-digit Numbers Without Regrouping | Early Math | Khan Academy

998 views / 1 likes - added 8 years ago

Learn to add 23 + 45 thinking about place value. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-add-sub-100/cc-early-math-add-subtract-100/e/addition_3?utm_source=YT&utm_medium=Desc&ut
05:14 Popular
Intensifiers And Adverbs Of Degree | Modifiers | The Parts Of Speech

998 views / 0 likes - added 8 years ago

Words like 'very' and 'slightly' are examples of intensifiers and adverbs of degree. Here's how they work! Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/partsofspeech/the-modifier/e/intensifiers-and-adver
04:33 Popular
Coordinating conjunctions | The parts of speech | Grammar | Khan Academy

997 views / 0 likes - added 6 years ago

Coordinating conjunctions connect parts of sentences to each other. David explains how. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/partsofspeech/conjunctions/e/meet-the-conjunction?utm_source=YT&utm_me
02:45 Popular
Understanding Place Value While Subtracting Ones | Early Math | Khan Academy

989 views / 0 likes - added 8 years ago

Learn how to subtract 4 from 46 by thinking about place value. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-add-sub-100/cc-early-math-sub-ones-tens/e/subtract-with-in-100-level-1?utm
02:17 Popular
Pieces Of Fruit | Basic Addition And Subtraction | Early Math | Khan Academy

986 views / 0 likes - added 8 years ago

Learn how to add fruit (by putting fruit together) and sutract fruit (by taking fruit away). Examples used are 5+3 and 5-3. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-add-sub-basic
13:17 Popular
Probability that at least 2 people in a room of 30 share the same birthday | Probability and Statist

982 views / 0 likes - added 6 years ago

The probability that at least 2 people in a room of 30 share the same birthday. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/probability/probability-and-combinatorics-topic/probability_combinatorics/e/probab
03:40 Popular
Comparing Decimals Visually Example | 4th Grade | Khan Academy

980 views / 0 likes - added 8 years ago

Learn how to compare decimals using grid diagrams. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/cc-fourth-grade-math/cc-4th-decimals/cc-4th-compare-decimals-visually/e/comparing-decimals-visually?utm_source=
12:48 Popular
The Electron: Crash Course Chemistry #5

979 views / 0 likes - added 9 years ago

Hank brings us the story of the electron and describes how reality is a kind of music, discussing electron shells and orbitals, electron configurations, ionization and electron affinities, and how all these things can be understood via the periodic table.
04:58 Popular
Number Grid | Counting | Early Math | Khan Academy

978 views / 0 likes - added 8 years ago

In our introductory video to counting, Sal goes through all the numbers from 0 to 100, so we can start to see some interesting patterns. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-
01:45 Popular
Renewable Energy - Powered by Poop | California Academy of Sciences

975 views / 0 likes - added 6 years ago

In this Flipside Science unit, designed for a middle school audience, we'll explore environmental issues related to energy use and conservation. In our most recent installment, find out how a dairy farm is using a methane digester to turn cow poop into el
07:19 Popular
Reflecting Segments Over Line | Transformations | Geometry | Khan Academy

974 views / 0 likes - added 8 years ago

Reflecting segments over line Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/geometry/transformations/hs-geo-reflections/e/reflections-1?utm_source=YT&utm_medium=Desc&utm_campaign=Geometry Watch the next lesso
05:41 Popular
That versus which | The parts of speech | Grammar | Khan Academy

970 views / 0 likes - added 6 years ago

Much has been made of the distinction between "that" and "which" in English, but it can mostly be summed up in two points: 1. "That" doesn't work so well with commas. 2. "Which" doesn't work so well with people. David the Grammarian explains. Watch the ne
02:46 Popular
Introduction to Grammar | Grammar | Khan Academy

970 views / 0 likes - added 6 years ago

Khan Academy Grammarian David Rheinstrom welcomes you to his favorite topic: the study of language, its rules, and its conventions. By understanding English – by speaking it, by writing it, by reading this very sentence – you are a grammarian yourself! Wa
09:15 Popular
What is Chemical Evolution?

968 views / 0 likes - added 9 years ago

Have you ever wondered how life first got started on Earth? So do scientists! Though the question has not yet been fully answered, a careful study of Chemical Evolution is beginning to shed light on this mystery. In this film you will learn what Chemical
00:59 Popular
Average Height Of A Building's Floor | Multiplication And Division | 3th Grade | Khan Academy

968 views / 0 likes - added 8 years ago

Learn how to use the Khan Academy number line widget. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/cc-third-grade-math/cc-3rd-fractions-topic/cc-3rd-fractions-on-the-number-line/e/fractions_on_the_number_lin
02:50 Popular
The future tense | The parts of speech | Grammar | Khan Academy

966 views / 0 likes - added 6 years ago

When you want to talk about the future in English, you use the future tense. Watch the next lesson: https://www.khanacademy.org/humanities/grammar/partsofspeech/grammar-verbs/v/linking-verbs-the-parts-of-speech-grammar?utm_source=YT&utm_medium=Desc&utm_ca
04:25 Popular
Multiplying Challenging Decimals | Decimals | Pre-Algebra | Khan Academy

965 views / 0 likes - added 8 years ago

Sometimes multiplying really small decimals (with all those zeros!) can be a little intimidating. Watch as we show you a handy trick to simplify these problems and solve them. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanaca
07:50 Popular
Compound Prepositions | Prepositions | The Parts Of Speech | Grammar

963 views / 0 likes - added 8 years ago

These prepositions are called compound prepositions, or multisyllabic prepositions. Like most prepositions, they have both literal and figurative meanings. David explains. Watch the next lesson: https://www.khanacademy.org/humanities/grammar/partsofspeech
09:46 Popular
Atomic Hook-Ups - Types of Chemical Bonds: Crash Course Chemistry #22

960 views / 0 likes - added 9 years ago

Atoms are a lot like us - we call their relationships "bonds," and there are many different types. Each kind of atomic relationship requires a different type of energy, but they all do best when they settle into the lowest stress situation possible. The n
06:00 Popular
Can Of Coke In Liquid Nitrogen - Periodic Table Of Videos

958 views / 0 likes - added 9 years ago

Coca-Cola and Pepsi in Liquid Nitrogen. Featuring Professor Sir Martyn Poliakoff and Neil Barnes. Coke Can in Acid: https://www.youtube.com/watch?v=WnPrtYUKke8 Coke and Pepsi chemistry: https://www.youtube.com/watch?v=cejoE9l4FCc Gold Vault: https://www.y
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03:48 Popular
The Strengths And Weaknesses Of Acids And Bases - George Zaidan And Charles Morton

956 views / 0 likes - added 8 years ago

View full lesson: http://ed.ted.com/lessons/the-strengths-and-weaknesses-of-acids-and-bases-george-zaidan-and-charles-morton Vinegar may have a powerful smell, but did you know it's actually a weak acid? In the chemical economy, acids actively give away t
01:16 Popular
Solving Quadratic Equations — Basic Example | Math | New SAT | Khan Academy

954 views / 0 likes - added 8 years ago

Watch Sal work through a basic Solving quadratic equations problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/v/sat-math-p5-harder?utm_source=YT&utm_medium=Desc&utm_campaign=New
03:51 Popular
The Chemistry of Skunk Spray

951 views / 3 likes - added 7 years ago

How do you get rid of skunk odor? Don't use tomato juice... Use chemistry! Subscribe! http://bit.ly/1FkxVLb ‖ Twitter! https://twitter.com/gross_science ‖ Tumblr! http://grossscience.tumblr.com/ ↓Want more info?↓ Recipe for De-Skunking Spray: http://users
02:06 Popular
Relating Addition And Subtraction | Basic Addition And Subtraction | Early Math | Khan Academy

950 views / 0 likes - added 8 years ago

See the relationship between 2+3=5, 5-2=3, and 5-3=2. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-add-sub-basics/cc-early-math-add-subtract-10/e/relate-addition-and-subtraction?utm_
03:09 Popular
How To Write Basic Algebraic Expressions From Word Problems | 6th Grade | Khan Academy

949 views / 0 likes - added 8 years ago

Learn how to write basic expressions with variables to describe situations described in word problems. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-expressions-and-variables/cc-6th
07:51 Popular
How To Solve One-step Multiplication And Division Equations With Fractions And Decimals

948 views / 0 likes - added 8 years ago

"Learn how to solve equations in one step by multiplying or dividing a number from both sides. These problems involve decimals and fractions. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/cc-sixth-grade-math/
07:57 Popular
Le Chatelier's principle: Worked example | Chemical equilibrium | Chemistry | Khan Academy

944 views / 0 likes - added 6 years ago

A worked example using Le Chatelier's principle to predict how concentrations will shift for different perturbations. Example includes changes in reaction vessel volume, changing amount of solid product, adding inert gas, and adding a catalyst. Chemistry
08:20 Popular
Network Solids and Carbon: Crash Course Chemistry #34

941 views / 0 likes - added 9 years ago

You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Also, if you can afford to pay a little every month, it really helps us to continue producing great content.
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Irregular Plural Nouns, Part II | The Parts Of Speech | Grammar | Khan Academy

940 views / 0 likes - added 8 years ago

The plural of "whale" is "whales", but what's the plural of "child"? David, Khan Academy's resident grammarian, explains. About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower
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Understanding Place Value When Subtracting Tens | Early Math | Khan Academy

940 views / 0 likes - added 8 years ago

Learn how to subtract 40 from 65 by thinking about place value. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-add-sub-100/cc-early-math-sub-ones-tens/e/subtract-with-in-100-level-1?ut
02:53 Popular
More Word Problems | Addition And Subtraction Within 100 | Early Math | Khan Academy

940 views / 0 likes - added 8 years ago

Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-add-sub-100/cc-early-math-more-fewer-100/e/addition-and-subtraction-word-problems-within-100--level-3?utm_source=YT&utm_medium=Desc&utm_c
03:37 Popular
Adding Hundreds, Tens, And Ones | Addition And Subtraction Within 100 | Early Math | Khan Academy

940 views / 0 likes - added 8 years ago

Learn how to add three-digit numbers by adding ones, tens, and hundreds. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-add-sub-100/cc-early-math-add-ones-tens-hundreds/e/add-within-10
03:36 Popular
Introduction to contractions | The Apostrophe | Punctuation | Khan Academy

940 views / 1 likes - added 6 years ago

Apostrophes are great at standing in for missing letters, allowing us to shorten words. Paige and David discuss contractions and the Principle of Least Effort. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/the-apostrophe/e/
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Ratios, Rates, And Proportions — Harder Example | Math | New SAT | Khan Academy

938 views / 0 likes - added 8 years ago

Watch Sal work through a harder Ratios, rates, and proportions problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-problem-solving-data-analysis/v/sat-math-q2-easier?utm_source=YT&utm_medium=Desc&utm_campaign
09:03 Popular
Lab Techniques&Safety: Crash Course Chemistry #21

937 views / 0 likes - added 9 years ago

Hank takes a break from the desk to bring you to the lab in order to demonstrate some important points about the practical side of chemistry - experimentation in the laboratory. You'll learn what to wear in the lab, how to dispose of chemicals safely, how
11:45 Popular
Ideal Gas Problems: Crash Course Chemistry #13

935 views / 0 likes - added 9 years ago

We don't live in a perfect world, and neither do gases - it would be great if their particles always fulfilled the assumptions of the ideal gas law, and we could use PV=nRT to get the right answer every time. Unfortunately, the ideal gas law (like our cul
05:50 Popular
Length Word Problems | Measurement And Data | Early Math | Khan Academy

935 views / 0 likes - added 8 years ago

Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-measure-data-topic/cc-early-math-length-word-problems/e/length-word-problems?utm_source=YT&utm_medium=Desc&utm_campaign=EarlyMath Watch t
03:23 Popular
Comparison Word Problems | Addition And Subtraction Within 20 | Early Math | Khan Academy

933 views / 0 likes - added 8 years ago

Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-add-sub-20/cc-early-math-word-problems-more-fewer-20/e/addition-and-subtraction-word-problems-within-20--level-3?utm_source=YT&utm_medium
10:55 Popular
10 Amazing Science Experiments! Compilation

933 views / 0 likes - added 7 years ago

This video is a compilation of top 10 science experiments you can do at home. 0:00 Fire Tornado 1:29 Smartphone 3D hologram 2:16 Soap propelled boat 2:43 Sugar and sulfuric acid reaction 5:05 No-leak magic bag 5:43 Silver egg 6:14 Coke and bleach reaction
02:29 Popular
Microscopic Time-Lapse: See the Crazy Chemistry of Reacting Metal | Short Film Showcase

932 views / 0 likes - added 7 years ago

When describing chemistry, beauty doesn't usually come to mind. However, the scientists at Beauty of Science have made it their mission to change that through their incredible visuals of the world beneath the microscope. In this video from their "Envision
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Rate constant k from half-life example | Knetics | Chemistry | Khan Academy

932 views / 0 likes - added 6 years ago

Example problem showing how to find the rate constant k from the half-life of a first order reaction. Watch the next lesson: https://www.khanacademy.org/science/chemistry/chem-kinetics/copy-of-kinetics/v/second-order-reaction-with-calculus?utm_source=YT&u
08:17 Popular
Right Triangle Geometry — Basic Example | Math | New SAT | Khan Academy

929 views / 0 likes - added 8 years ago

Watch Sal work through a basic Right triangle geometry problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/v/sat-math-s7-harder?utm_source=YT&utm_medium=Desc&utm_campaign=NewSAT Missed
02:00 Popular
The past tense | The parts of speech | Grammar | Khan Academy

929 views / 0 likes - added 6 years ago

When you want to talk about events that have already happened, you use the past tense. Watch the next lesson: https://www.khanacademy.org/humanities/grammar/partsofspeech/grammar-verbs/v/the-future-tense-verbs-the-parts-of-speech?utm_source=YT&utm_medium=
04:29 Popular
Simple and compound sentences | Syntax | Khan Academy

926 views / 0 likes - added 6 years ago

A simple sentence contains one independent clause. A compound sentence contains more than one! Put another way: a simple sentence contains a subject and a predicate, but a compound sentence contains more than one subject and more than one predicate. Pract
02:09 Popular
Insanely beautiful chemical reactions

926 views / 0 likes - added 6 years ago

If you think you know what chemical reactions look like, think again. A group of Chinese scientists and photographers created videos that capture the unseen beauty of chemistry. Watch more chemical reactions from two of their video series: Beautiful Chemi
10:12 Popular
The Nucleus: Crash Course Chemistry #1

922 views / 1 likes - added 9 years ago

Hank does his best to convince us that chemistry is not torture, but is instead the amazing and beautiful science of stuff. Chemistry can tell us how three tiny particles - the proton, neutron and electron - come together in trillions of combinations to f
16:36 Popular
Writing: Informative — How-to Example | Reading & Writing | New SAT | Khan Academy

921 views / 0 likes - added 8 years ago

Watch Sal work through an SAT Writing: Informative passage. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-passages/v/sat-writing-narrative?utm_source=YT&utm_medium=Desc&utm_campaign=NewSAT Mis
02:36 Popular
Prepositions Of Neither Space Nor Time | Prepositions | The Parts Of Speech | Grammar

921 views / 0 likes - added 8 years ago

Some prepositions describe relationships between people or things. These prepositions don’t include information about time or space. Watch the next lesson: https://www.khanacademy.org/the-preposition/e/common-prepositions Missed the previous lesson? Watch
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pH and pOH: Crash Course Chemistry #30

920 views / 1 likes - added 9 years ago

You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Also, if you can afford to pay a little every month, it really helps us to continue producing great content.
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Counting In Order | Counting | Early Math | Khan Academy

920 views / 0 likes - added 8 years ago

Learn how to count without making mistakes. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-counting-topic/cc-early-math-counting/e/counting-objects?utm_source=YT&utm_medium=Desc&utm_ca
09:54 Popular
Introduction To Amino Acids

914 views / 0 likes - added 8 years ago

Understanding amino acids and their role in the Central Dogma of Molecular Biology (how the information in DNA eventually gets expressed as chains of amino acids). Thinking about the amino and carboxyl groups and how amino acids are typically found as zwi
02:38 Popular
Graphing Linear Equations — Harder Example | Math | New SAT | Khan Academy

914 views / 0 likes - added 8 years ago

Watch Sal work through a harder Graphing linear equations problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-heart-of-algebra/v/sat-math-h3-easier?utm_source=YT&utm_medium=Desc&utm_campaign=NewSAT Missed the
11:32 Popular
Hydrocarbon Power! - Crash Course Chemistry #40

913 views / 0 likes - added 9 years ago

You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Also, if you can afford to pay a little every month, it really helps us to continue producing great content.
04:08 Popular
Plotting Decimal Numbers On A Number Line (examples) | Khan Academy

913 views / 0 likes - added 8 years ago

Learn how to find decimals with hundredths on a number line. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/cc-fourth-grade-math/cc-4th-decimals/cc-4th-decimals-number-line/e/decimals_on_the_number_line_2?utm_
03:04 Popular
How To Create A Function From An Equation (example) | Functions | Algebra I | Khan Academy

913 views / 0 likes - added 8 years ago

Sal find the formula of a function that, given an input value "b," outputs a value "a" that satisfies the equation 4a+7b=-52. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/algebra/algebra-functions/functions-
03:59 Popular
Meet the Comma | Punctuation | Grammar | Khan Academy

911 views / 1 likes - added 6 years ago

David and Paige introduce you to the superhero of the punctuation world: the comma! Practice this yourself on Khan Academy right now: . Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/punctuation/the-comma/
01:19 Popular
Magic Milk Chemistry Experiment

905 views / 1 likes - added 6 years ago

Dip the q-tip in dish-washing detergent. Place food coloring in the middle of the bowl with milk. Touch the color with the q-tip. The detergent will start to bond with the fats in the milk which will get all the molecules moving, carrying with them also t
00:56 Popular
Counting With Small Numbers | Counting | Early Math | Khan Academy

896 views / 0 likes - added 8 years ago

Learn how to count squirrels and horses. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-counting-topic/cc-early-math-counting/e/counting-out-1-20-objects?utm_source=YT&utm_medium=Desc&
02:55 Popular
Emphatic pronouns | The parts of speech | Grammar | Khan Academy

893 views / 0 likes - added 6 years ago

Sometimes we use reflexive pronouns like "myself" and "ourselves" for emphasis in a sentence, like, "If you won't help me, then I'll do it myself!" KA's Grammar Fellow, David, explains this usage. Practice this yourself on Khan Academy right now: https://
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Orbitals: Crash Course Chemistry #25

891 views / 0 likes - added 9 years ago

In this episode of Crash Course Chemistry, Hank discusses what Molecules actually look like and why, some quantum-mechanical three dimensional wave functions are explored, he touches on hybridization, and delves into sigma and pi bonds. -- Table of Conten
06:17 Popular
Solving Percent Problems | Decimals | Pre-Algebra | Khan Academy

890 views / 0 likes - added 8 years ago

We'll use algebra to solve this percent problem. Watch the next lesson: https://www.khanacademy.org/math/pre-algebra/decimals-pre-alg/percent-word-probs-pre-alg/v/solving-percent-problems-2?utm_source=YT&utm_medium=Desc&utm_campaign=PreAlgebra Missed the
03:13 Popular
How To Make Fish Less Fishy (Chemistry Life Hacks)

890 views / 0 likes - added 7 years ago

Subscribe! http://bit.ly/ACSReactions Freshly caught fish is delicious. But after a day or two, that filet in your fridge smells a little fishier, thanks to a stinky molecule known as trimethylamine. Is there any hope? This week, find out how to make fish
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05:05 Popular
Solving Ratio Problems With Tables Example 1 | Pre-Algebra | Khan Academy

887 views / 0 likes - added 8 years ago

We're displaying ratios in a table format here, and then asking: given a ratio, solve for equivalent ratios. Here are a few examples to practice on. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-algebra/r
07:08 Popular
Early Train Word Problem | Linear Equations | Algebra I | Khan Academy

886 views / 0 likes - added 8 years ago

Fun word problem that is almost a brain teaser. Watch the next lesson: https://www.khanacademy.org/math/algebra/solving-linear-equations-and-inequalities/More-equation-practice/v/patterns-in-sequences-1?utm_source=YT&utm_medium=Desc&utm_campaign=AlgebraI
02:34 Popular
Irregular Plural Nouns, Part I | The Parts Of Speech | Grammar | Khan Academy

884 views / 0 likes - added 8 years ago

The plural of "dog" is "dogs", but what is the plural of "leaf"? Khan Academy's resident grammarian explains. Watch the next lesson: https://youtu.be/n9poHOKkF28 About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a perso
04:33 Popular
Multiplying Negative And Positive Fractions | Fractions | Pre-Algebra | Khan Academy

884 views / 0 likes - added 8 years ago

See examples of multiplying and dividing fractions with negative numbers. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-algebra/fractions-pre-alg/multiplying-fractions-pre-alg/e/multiplying_fractions?utm_
01:22 Popular
Radical And Rational Equations — Basic Example | Math | New SAT | Khan Academy

880 views / 0 likes - added 8 years ago

Watch Sal work through a basic Radical and rational equations problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/v/sat-math-p7-harder?utm_source=YT&utm_medium=Desc&utm_campaign=
03:52 Popular
Angles, Arc Lengths, And Trig Functions — Basic Example | Math | New SAT | Khan Academy

879 views / 0 likes - added 8 years ago

Watch Sal work through a basic Angles, arc lengths, and trig functions problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/v/sat-math-s4-harder?utm_source=YT&utm_medium=Desc&utm_campaig
01:59 Popular
Your Hair is Strong Enough to Lift Two Elephants

874 views / 0 likes - added 7 years ago

THE QUICK AND THE CURIOUS Not that we suggest you try it… Human hair is composed of various amino acids that wrap around each other like chains on a molecular level. Subscribe to Science Channel: http://bit.ly/SubscribeScience Watch full episodes: http://
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05:18 Popular
Pronoun number | The parts of speech | Grammar | Khan Academy

874 views / 0 likes - added 6 years ago

The difference between something being singular or plural is what we call 'grammatical number' in English. Here's how that idea applies to pronouns! Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/partsofsp
04:39 Popular
Grammatical person and pronouns | The parts of speech | Grammar | Khan Academy

874 views / 0 likes - added 6 years ago

There's this idea in grammar called grammatical person that helps describe who's being talked about in a sentence. David, KA's Grammar Fellow, explains. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/parts
05:18 Popular
Linear And Exponential Growth — Harder Example | Math | New SAT | Khan Academy

870 views / 0 likes - added 8 years ago

Watch Sal work through a harder Linear and exponential growth problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-problem-solving-data-analysis/v/sat-math-q8-easier?utm_source=YT&utm_medium=Desc&utm_campaign=
10:32 Popular
Rotating About Arbitrary Point | Transformations | Geometry | Khan Academy

869 views / 0 likes - added 8 years ago

Rotating about arbitrary point Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/geometry/transformations/hs-geo-rotations/e/rotations-2?utm_source=YT&utm_medium=Desc&utm_campaign=Geometry Watch the next lesson:
05:20 Popular
Overview Of Pixar In A Box

868 views / 0 likes - added 8 years ago

To see the full curriculum, go to www.pixarinabox.org. Learn how Pixar filmmakers use science, technology, engineering, art, and math to create movie magic. Pixar in a Box is a collaboration between Khan Academy and Pixar Animation Studios, sponsored by D
04:25 Popular
Using Crayons | Addition And Subtraction Within 100 | Early Math | Khan Academy

863 views / 1 likes - added 8 years ago

Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-add-sub-100/cc-early-math-add-sub-100-word-problems/e/addition-and-subtraction-word-problems-within-100--level-2?utm_source=YT&utm_medium
02:12 Popular
Fewer Word Problems | Addition And Subtraction Within 100 | Early Math | Khan Academy

863 views / 0 likes - added 8 years ago

Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-add-sub-100/cc-early-math-more-fewer-100/e/addition-and-subtraction-word-problems-within-100--level-3?utm_source=YT&utm_medium=Desc&utm_c
01:42 Popular
Addition Word Problems Within 10 | Basic Addition And Subtraction | Early Math | Khan Academy

859 views / 1 likes - added 8 years ago

Learn how to solve word problems by adding small numbers (numbers 10 or less). Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-add-sub-basics/cc-early-math-add-sub-word-problem-within-1
02:01 Popular
Table Data — Harder Example | Math | New SAT | Khan Academy

857 views / 0 likes - added 8 years ago

Watch Sal work through a harder Table data problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-problem-solving-data-analysis/v/sat-math-q4-easier?utm_source=YT&utm_medium=Desc&utm_campaign=NewSAT Missed the p
13:26 Popular
ATP&Respiration: Crash Course Biology #7

855 views / 0 likes - added 9 years ago

In which Hank does some push ups for science and describes the "economy" of cellular respiration and the various processes whereby our bodies create energy in the form of ATP. Crash Course Biology is now available on DVD! http://dftba.com/product/1av/Cras
03:43 Popular
BONUS: The Oxford comma | Punctuation | Grammar | Khan Academy

853 views / 0 likes - added 6 years ago

David and Paige tackle the great comma debate of our time: Oxford comma or no Oxford comma? Missed the previous lesson? https://www.khanacademy.org/humanities/grammar/punctuation/the-comma/v/appositives-the-comma-punctuation-khan-academy?utm_source=YT&utm
07:21 Popular
10 Surprising Chemicals Your Body Makes

852 views / 0 likes - added 8 years ago

Everything is made of chemicals, including the human body, but there are some especially weird ones... Hosted by: Michael Aranda ---------- Sources: http://www.ncbi.nlm.nih.gov/books/NBK22459/ https://www.dnalc.org/view/841-dopamine-and-ADHD.html http://h
04:14 Popular
Compound-complex sentences | Syntax | Khan Academy

852 views / 0 likes - added 6 years ago

Compound-complex sentences are compound sentences with dependent or subordinate clauses added to them. Paige and Rosie explain how to spot and use them. Practice this yourself on Khan Academy right now www.khanacademy.org/syntax/e/complex-and-compound-com
02:37 Popular
How To Write Basic Expressions With Variables | 6th Grade | Khan Academy

848 views / 0 likes - added 8 years ago

Learn how to write basic algebraic expressions. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-expressions-and-variables/cc-6th-writing-expressions/e/writing-expressions-with-variabl
09:43 Popular
Smelly Chemistry - Periodic Table Of Videos

846 views / 0 likes - added 9 years ago

Mercaptans - or Thiols - are some of the smelliest chemicals around. We didn't dare open the bottle. PsyFile: https://www.youtube.com/psyfile More chemistry at http://www.periodicvideos.com/ Follow us on Facebook at http://www.facebook.com/periodicvideos
05:39 Popular
Solving Quadratic Equations — Harder Example | Math | New SAT | Khan Academy

844 views / 0 likes - added 8 years ago

Watch Sal work through a harder Solving quadratic equations problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/v/sat-math-p10-easier?utm_source=YT&utm_medium=Desc&utm_campaign=N
02:39 Popular
Proportionality Between Side Length And Perimeter | 7th Grade | Khan Academy

843 views / 0 likes - added 8 years ago

Is the perimeter of a square proportional to the side length of the square? Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/cc-seventh-grade-math/cc-7th-ratio-proportion/cc-7th-proportional-rel/e/analyzing-and-
05:15 Popular
Thinking About The Changing Values Of Variables And Expressions | 6th Grade | Khan Academy

842 views / 0 likes - added 8 years ago

Explore how the value of an algebraic expression changes as the value of its variable changes. The algebraic expressions used in this video are 100-x, 5/x + 5, and (3y)/(2y). Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacad
02:36 Popular
Counting By Tens Examples | Addition And Subtraction Within 100 | Early Math | Khan Academy

841 views / 0 likes - added 8 years ago

Learn to count by tens. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-add-sub-100/cc-early-math-skip-counting/e/skip-counting-by-10s?utm_source=YT&utm_medium=Desc&utm_campaign=EarlyMa
04:51 Popular
Hyphens vs. dashes | Punctuation | Khan Academy

841 views / 1 likes - added 6 years ago

Hyphens and dashes look pretty similar, but their uses are very different! Learn when to use each one in this video. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/miscellaneous-punctuation/e/dashes-and-hyphens Watch the nex
01:36 Popular
Regal Academy | First Official Super Trailer | Nick

836 views / 0 likes - added 7 years ago

Welcome to Regal Academy! Follow Rose Cinderella on her adventure through a fairy tale school, as she discovers her family's true storybook past... and rides a dragon or two! Don't miss the brand new show coming happily ever after to Nickelodeon! Subscrib
03:13 Popular
Interpreting Nonlinear Expressions — Harder Example | Math | New SAT | Khan Academy

834 views / 0 likes - added 8 years ago

Watch Sal work through a harder Interpreting nonlinear expressions problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/v/sat-math-p1-easier?utm_source=YT&utm_medium=Desc&utm_camp
07:50 Popular
pH and pKa relationship for buffers | Chemistry | Khan Academy

834 views / 0 likes - added 6 years ago

How the Henderson-Hasselbalch equation can be used to look at the ratio of conjugate acid and base using relationship between buffer pH and pKa. Watch the next lesson: https://www.khanacademy.org/science/chemistry/acid-base-equilibrium/buffer-solutions/v/
02:18 Popular
Salutations and valedictions | Punctuation | Grammar | Khan Academy

829 views / 0 likes - added 6 years ago

David and Paige, KA’s resident grammarians, talk about how to address and sign off on letters using commas! Watch the next lesson: https://www.khanacademy.org/humanities/grammar/punctuation/the-comma/v/commas-in-space-and-time-the-comma-punctuation-khan-a
03:59 Popular
Adding Ten Or One Hundred | Addition And Subtraction Within 100 | Early Math | Khan Academy

827 views / 1 likes - added 8 years ago

Learn how to add 1, 10, or 100 to a number. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-add-sub-100/cc-early-math-add-ones-tens-hundreds/e/add-within-1000--level-1?utm_source=YT&utm
03:19 Popular
Commas in space and time | The Comma | Punctuation | Khan Academy

827 views / 0 likes - added 6 years ago

Learn how to use commas when writing addresses (in space) and dates (in time). Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/punctuation/the-comma/e/salutations--valedictions--dates--and-addresses Watch t
03:00 Popular
Units — Basic Example | Math | New SAT | Khan Academy

825 views / 0 likes - added 8 years ago

Watch Sal work through a basic Units problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-problem-solving-data-analysis/v/sat-math-q3-harder?utm_source=YT&utm_medium=Desc&utm_campaign=NewSAT Missed the previou
07:22 Popular
Data Collection And Conclusions — Harder Example | Math | New SAT | Khan Academy

819 views / 0 likes - added 8 years ago

Watch Sal work through a harder Data collections and conclusions problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/v/sat-math-s1-easier?utm_source=YT&utm_medium=Desc&utm_campaign=NewS
04:50 Popular
Linear And Quadratic Systems — Basic Example | Math | New SAT | Khan Academy

816 views / 0 likes - added 8 years ago

Watch Sal work through a basic Linear and quadratic systems problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/v/sat-math-p8-harder?utm_source=YT&utm_medium=Desc&utm_campaign=Ne
05:03 Popular
Units — Harder Example | Math | New SAT | Khan Academy

814 views / 0 likes - added 8 years ago

Watch Sal work through a harder Units problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-problem-solving-data-analysis/v/sat-math-q7-easier?utm_source=YT&utm_medium=Desc&utm_campaign=NewSAT Missed the previo
07:45 Popular
Introduction to chemistry

812 views / 0 likes - added 6 years ago

A big picture intro to chemistry and why it is fascinating. Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a fir
11:45 Popular
More Professor Q And A - Periodic Table Of Videos- Periodic Table Of Videos

811 views / 1 likes - added 9 years ago

A second Q and A video to mark our 500th video - the first one is at: http://youtu.be/op1Dp1r66OE More chemistry at http://www.periodicvideos.com/ Follow us on Facebook at http://www.facebook.com/periodicvideos And on Twitter at http://twitter.com/periodi
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Introduction to verb tense | The parts of speech | Grammar | Khan Academy

811 views / 0 likes - added 6 years ago

An understanding of verb tense will make you into a TIME WIZARD, with the ability to control the past, the present, and the future – with your words, anyway. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/
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Are 2 Snowflakes Ever Identical?

811 views / 2 likes - added 5 years ago

Is the “unique snowflake” just flake news? Mother Nature might never produce two identical snowflakes, thanks to the near-infinite variability of the conditions affecting ice crystal formation. But a Caltech scientist has developed a process for growing p
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Dissolving Coins in Nitric Acid - Periodic Table of Videos

811 views / 0 likes - added 3 years ago

We put Nitric Acid through its paces, including dissolving coins. More links and info in full description Featuring Sir Martyn Poliakoff and Neil Barnes.See some previous acid videos: https://bit.ly/AcidVideosVideos on all 118 elements: http://bit.ly/118e
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Equivalent Fractions And Different Wholes | Fractions | 4th Grade | Khan Academy

810 views / 0 likes - added 8 years ago

Learn how two fractions are equivalent only if they refer to the same whole. For example, 1/2 of a small circle is not the same as 1/2 of a big circle. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/cc-fourth-
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The present tense | The parts of speech | Grammar | Khan Academy

810 views / 0 likes - added 6 years ago

How do we talk about things that are happening right now? Watch the next lesson: https://www.khanacademy.org/humanities/grammar/partsofspeech/grammar-verbs/v/the-past-tense-verbs-the-parts-of-speech?utm_source=YT&utm_medium=Desc&utm_campaign=grammar Misse
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Skip Counting By 100 Example | Addition And Subtraction Within 100 | Early Math | Khan Academy

807 views / 0 likes - added 8 years ago

Learn to count by hundreds. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-add-sub-100/cc-early-math-skip-counting/e/skip-counting-by-100s?utm_source=YT&utm_medium=Desc&utm_campaign=Ea
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SIKIDS.com: What It's Like Being A Florida Gators Fan

806 views / 0 likes - added 9 years ago

SIKIDS.com visits The Swamp to get a closer look at one of the most die-hard fan bases in the country. For more videos like this, check out SIKIDS.com
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More uses for commas | Punctuation | Grammar | Khan Academy

805 views / 0 likes - added 6 years ago

David and Paige, KA’s resident grammarians, discuss tag questions, yes and no statements, and direct address -- all situations where the comma is super useful. Watch the next lesson: https://www.khanacademy.org/humanities/grammar/punctuation/the-comma/v/c
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How America became a superpower

800 views / 0 likes - added 7 years ago

From a colony to a superpower in 200 years. Subscribe to our channel! http://goo.gl/0bsAjO 2:07 Correction: Cuba seceded from the US in 1902. With over 800 military bases around the globe, the US is easily the most powerful nation on earth. But it wasn't
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Under The Hood: The Chemistry Of Cars - Cynthia Chubbuck

799 views / 0 likes - added 9 years ago

View full lesson: http://ed.ted.com/lessons/under-the-hood-the-chemistry-of-cars-cynthia-chubbuck There are over one billion cars in the world right now, getting people from point A to point B. But cars aren't just a mode of transportation; they also teac
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Getting To 10 By Filling Boxes | Basic Addition And Subtraction | Early Math | Khan Academy

796 views / 0 likes - added 8 years ago

Learn how to add two numbers to make 10. This video shows two examples: 3 + ___ = 10 and 6 + ___ = 10. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-add-sub-basics/cc-early-math-make-
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Khan Academy Live: SAT Math

792 views / 0 likes - added 6 years ago

Need help with SAT math? Join Eric, one of Khan Academy’s SAT experts, for an SAT math class. Eric reviews some of the most important math skills for the test and provides tips on how to avoid careless mistakes. This is a recording of our May 16 livestrea
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Introduction To Agreement | Verbs | The Parts Of Speech

791 views / 0 likes - added 8 years ago

When you match up the subject of a sentence with a verb, it's called 'agreement'. Here's how it works! Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/partsofspeech/grammar-verbs/e/intro-to-verb-agreement M
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How Do Sparklers Work?

791 views / 1 likes - added 7 years ago

Subscribe! http://bit.ly/ACSReactions Now that the Fourth of July is just around the corner you firework lovers out there are gearing up for the big day. We on the other hand have been taking an up close, slow motion look at the chemistry of how sparklers
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Flesh-Eating Hydrofluoric Acid - Periodic Table Of Videos

790 views / 0 likes - added 9 years ago

We dunk chicken drumsticks in dreaded Hydrofluoric Acid, along with Hydrochloric Acid and Sulfuric Acid. What do you think might happen? SECOND PART: https://www.youtube.com/watch?v=NGaOcp33rHw Fluorine reactions: http://youtu.be/vtWp45Eewtw Lightbulb in
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Halves And Fourths | Geometry | Early Math | Khan Academy

790 views / 0 likes - added 8 years ago

Learn how to divide shapes into two or four equal sections. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-geometry-topic/cc-early-math-fractions-of-shapes/e/halves-and-fourths?utm_sou
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Place Value Example With 42 | Place Value (tens And Hundreds) | Early Math | Khan Academy

789 views / 0 likes - added 8 years ago

Learn to see 42 as 4 tens and 2 ones. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-place-value-topic/cc-early-math-tens/e/groups-of-tens?utm_source=YT&utm_medium=Desc&utm_campaign=Ea
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Introduction To Perimeter | Measurement | Pre-Algebra | Khan Academy

788 views / 0 likes - added 8 years ago

Find perimeter by adding side-lengths of various figures. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-algebra/measurement/perimeter/e/perimeter_1?utm_source=YT&utm_medium=Desc&utm_campaign=PreAlgebra Wa
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Volume: How To Measure It | Measurement | Pre-Algebra | Khan Academy

786 views / 0 likes - added 8 years ago

Volume is a measurement in the 3rd dimension. This means that it not only has width and height, but it has depth as well. Let's watch this video in which we get a great explanation of how we measure volume. Practice this lesson yourself on KhanAcademy.org
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Beginning sentences with conjunctions | The parts of speech | Grammar | Khan Academy

786 views / 0 likes - added 6 years ago

Is it okay to begin a sentence with a conjunction like "but" or "because"? Yes. David explains why. Missed the previous lesson? https://www.khanacademy.org/humanities/grammar/partsofspeech/conjunctions/v/correlative-conjunctions?utm_source=YT&utm_medium=D
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Entropy: Embrace the Chaos! Crash Course Chemistry #20

785 views / 0 likes - added 9 years ago

Life is chaos and the universe tends toward disorder. But why? If you think about it, there are only a few ways for things to be arranged in an organized manner, but there are nearly infinite other ways for those same things to be arranged. Simple rules o
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Why Do Some Organs Come In Pairs?

785 views / 0 likes - added 8 years ago

We all have two of certain organs, like kidneys and lungs, but why not multiple hearts, livers or brains? Read More: Bilaterial Symmetry http://www.nhm.ac.uk/nature-online/evolution/what-is-the-evidence/morphology/bilateralism/ “Humans have body plans tha
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The Chemistry Of Cookies - Stephanie Warren

784 views / 1 likes - added 8 years ago

View full lesson: http://ed.ted.com/lessons/the-chemistry-of-cookies-stephanie-warren You stick cookie dough into an oven, and magically, you get a plate of warm, gooey cookies. Except it's not magic; it's science. Stephanie Warren explains via basic chem
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Paper vehicle prototype with V8 paper engine

784 views / 0 likes - added 7 years ago

Eventually, the engine must be able to move :) In this model v8 paper engine mounted on vehicle prototype with gear drive with a total ratio 1:9 (two pairs of gears with ratio 1:3)
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Compose Shapes | Geometry | Early Math | Khan Academy

781 views / 0 likes - added 8 years ago

Learn how to combine shapes to make other shapes. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-geometry-topic/cc-early-math-composing-shapes/e/compose-shapes?utm_source=YT&utm_medium
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Equal Sign | Addition And Subtraction Within 20 | Early Math | Khan Academy

781 views / 0 likes - added 8 years ago

Learn what the equals sign really means. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-add-sub-20/cc-early-math-equals-sign/e/meaning-of-equal-sign-1?utm_source=YT&utm_medium=Desc&utm
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Noble gas configuration

781 views / 0 likes - added 6 years ago

How to write electron configurations for atoms and monatomic ions using noble gas configuration Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity
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DNA

780 views / 0 likes - added 9 years ago

DNA - deoxyribonucleic acid
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The Chemistry Of Cold Packs - John Pollard

780 views / 0 likes - added 9 years ago

View full lesson: http://ed.ted.com/lessons/how-do-cold-packs-get-cold-so-fast-john-pollard If you stick water in the freezer, it will take a few hours to freeze into ice. How is it, then, that cold packs go from room temperature to near freezing in mere
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Circle Equations — Basic Example | Math | New SAT | Khan Academy

780 views / 0 likes - added 8 years ago

Watch Sal work through a basic Circle equations problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/v/sat-math-s8-harder?utm_source=YT&utm_medium=Desc&utm_campaign=NewSAT Missed the pre
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Pronoun-antecedent agreement | Syntax | Khan Academy

780 views / 0 likes - added 6 years ago

An antecedent is “the thing that came before”. When you use a pronoun, it’s standing in for a word you used previously—that’s the antecedent. Join us as we demonstrate how to make sure that your pronouns and antecedents match up with one another: that’s c
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Count By Category | Counting | Early Math | Khan Academy

779 views / 0 likes - added 8 years ago

Learn to count the number of things in different categories. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-counting-topic/cc-early-math-comparing-numbers/e/sort-groups-by-count?utm_so
05:07 Popular
Complex sentences | Syntax | Khan Academy

779 views / 0 likes - added 6 years ago

Complex sentences are simple sentences with dependent or subordinate clauses added to them. Paige and Rosie explain how to spot them and use them in this video. Watch the next lesson: https://www.khanacademy.org/humanities/grammar/syntax/v/compound-comple
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Writing: Argument — How-to Example | Reading & Writing | New SAT | Khan Academy

776 views / 0 likes - added 8 years ago

Watch Sal work through an SAT Writing: Argument passage. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-reading-writing/new-sat-writing-passages/v/sat-writing-informational-passage?utm_source=YT&utm_medium=Desc&utm_campaign=N
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The Lord Of Chemistry - Periodic Table Of Videos

775 views / 0 likes - added 9 years ago

Distinguished chemist Jack Lewis passed away last month. As a member of the UK's House of Lords, he was Baron Lewis of Newnham. Nitrogen Tetroxide: http://youtu.be/JLCrZGgKD-k Rosetta: http://youtu.be/XEfKq-pQBcc More chemistry at http://www.periodicvideo
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Deadly Strychnine - Periodic Table Of Videos

775 views / 0 likes - added 8 years ago

Discussing Strychnine, a famous poison and an "Everest" of synthetic chemistry. Featuring Rob Stockman and Martyn Poliakoff. Very Fast Death Factor: https://youtu.be/lIavxAm4Mts Frog Poison: https://youtu.be/bqSeQuH_Tc4 Calcium ions are 2+ More chemistry
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Linear Algebra: Coordinates with respect to orthonormal bases

773 views / 0 likes - added 9 years ago

Seeing that orthonormal bases make for good coordinate systems More free lessons at: http://www.khanacademy.org/video?v=SWbis2zWIvo
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Skip Counting By 5 Example | Addition And Subtraction Within 100 | Early Math | Khan Academy

772 views / 0 likes - added 8 years ago

Learn to count by fives. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-add-sub-100/cc-early-math-skip-counting/e/skip-counting-by-5s?utm_source=YT&utm_medium=Desc&utm_campaign=EarlyMa
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Marathon Chemistry: The Science of Distance Running

770 views / 0 likes - added 7 years ago

Subscribe! http://bit.ly/ACSReactions Marathons are tough. Athletes push their bodies for miles and deal with cramping, dehydration and every runner’s worst fear: that extreme form of fatigue called “hitting the wall.” Why is distance running so difficult
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100 Candles - Periodic Table Of Videos

768 views / 0 likes - added 9 years ago

A short clip from the 100th birthday celebration for Dan Eley, FRS, held at the University of Nottingham. More chemistry at http://www.periodicvideos.com/ Follow us on Facebook at http://www.facebook.com/periodicvideos And on Twitter at http://twitter.com
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Introduction To The SAT Writing & Language Test | Tips & Planning | New SAT | Khan Academy

767 views / 0 likes - added 8 years ago

This is the last video in our New SAT subject! Missed the previous lesson? https://www.khanacademy.org/test-prep/new-sat/new-sat-tips-planning/new-sat-about-sat/v/sat-reading-test-intro?utm_source=YT&utm_medium=Desc&utm_campaign=NewSAT New SAT (starting M
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Nonlinear Equation Graphs — Basic Example | Math | New SAT | Khan Academy

765 views / 0 likes - added 8 years ago

Watch Sal work through a basic Nonlinear equation graphs problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-passport-advanced-mathematics/v/sat-math-p12-harder?utm_source=YT&utm_medium=Desc&utm_campaign=NewS
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The Mole 6 - Converting Mass of a Compound to Atoms and Ions

765 views / 0 likes - added 5 years ago

Craig Beals explains the final step in understanding how to use the mole in chemistry. Converting mass of a compound to atoms and ions requires knowledge and practice of all the other steps of the mole and becomes one of the main components in stoichiomet
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25 Chemistry Experiments in 15 Minutes | Andrew Szydlo | TEDxNewcastle

765 views / 0 likes - added 5 years ago

Whacky colour changes, magic disappearing water, blowing up dustbins, clouds of steam, thunder air explosions. Are you ready to fasten your seatbelts and enjoy the ‘explosive’ journey? In his talk, Andrew aims to promote chemistry as the scien
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Percents — Harder Example | Math | New SAT | Khan Academy

764 views / 0 likes - added 8 years ago

Watch Sal work through a harder Percents problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-problem-solving-data-analysis/v/sat-math-q3-easier?utm_source=YT&utm_medium=Desc&utm_campaign=NewSAT Missed the pre
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Chemistry and Our Universe: How it All Works | The Great Courses

764 views / 0 likes - added 7 years ago

https://www.thegreatcoursesplus.com/show/chemistry_and_our_universe_how_it_all_works?utm_source=US_SocialMedia&utm_medium=SocialMediaEditorialYoutube&utm_campaign=138569 Chemistry is the study of matter and energy at the scale of atoms and molecules. As t
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Subtraction Word Problems Within 10 | Basic Addition And Subtraction | Early Math | Khan Academy

762 views / 0 likes - added 8 years ago

Learn how to solve word problems by subtracting small numbers (numbers 10 or less). Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-add-sub-basics/cc-early-math-add-sub-word-problem-wit
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Nuclear Chemistry: Crash Course Chemistry #38

760 views / 0 likes - added 9 years ago

You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Also, if you can afford to pay a little every month, it really helps us to continue producing great content.
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Data Inferences — Harder Example | Math | New SAT | Khan Academy

760 views / 1 likes - added 8 years ago

Watch Sal work through a harder Data inferences problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-problem-solving-data-analysis/v/sat-math-q9-easier?utm_source=YT&utm_medium=Desc&utm_campaign=NewSAT Missed
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Unit Conversion&Significant Figures: Crash Course Chemistry #2

759 views / 0 likes - added 9 years ago

A unit is the frequently arbitrary designation we have given to something to convey a definite magnitude of a physical quantity and every quantity can be expressed in terms of the seven base units that are contained in the international system of units. H
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Spots On A Die | Addition And Subtraction Within 100 | Early Math | Khan Academy

759 views / 0 likes - added 8 years ago

Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-add-sub-100/cc-early-math-more-fewer-100/e/addition-and-subtraction-word-problems-within-100--level-4?utm_source=YT&utm_medium=Desc&utm_c
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Counting In Pictures | Counting | Early Math | Khan Academy

758 views / 0 likes - added 8 years ago

Learn how to count the number of objects you see in pictures. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-counting-topic/cc-early-math-count-object-topic/e/counting-in-scenes?utm_so
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Blaze Of Steel: Explosive Chemistry - With Andrew Szydlo

757 views / 0 likes - added 8 years ago

Andrew Syzdlo, chemist and school teacher, explores the chemistry of iron and steel. Featuring cool science experiments, explosions and pyrotechnics, this inspiring teacher challenges our perception of these metals' permanence. Subscribe for regular scien
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How To Find Mistakes In One Step Equations | 6th Grade | Khan Academy

757 views / 0 likes - added 8 years ago

Learn how to spot mistakes in someone else's work as they attempt to solve one-step equations. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-equations-and-inequalities/cc-6th-one-st
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Dependent Probability Example 1

754 views / 0 likes - added 9 years ago

Example of the type of problem in the Khan Academy Dependent Probability module More free lessons at: http://www.khanacademy.org/video?v=xPUm5SUVzTE
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Introduction To Subtraction | Basic Addition And Subtraction | Early Math | Khan Academy

754 views / 0 likes - added 8 years ago

Learn what it means to subtract. The examples used in this video are 4-3 and 5-2. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-add-sub-basics/cc-early-math-add-sub-intro/e/subtractio
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Measuring A Golden Statue | Measurement And Data | Early Math | Khan Academy

754 views / 0 likes - added 8 years ago

Measure an object with same-size length units that span it with no gaps or overlaps. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-measure-data-topic/cc-early-picture-graphs/e/solving
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Counting Dogs, Mice, And Cookies | Counting | Early Math | Khan Academy

753 views / 0 likes - added 8 years ago

Learn how to count animals organized in different patterns. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-counting-topic/cc-early-math-count-object-topic/e/how-many-objects-2?utm_sour

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