Light leaves leaves light.
Photosynthetic organisms capture energy from the sun and matter from the air to make the food we eat, while also producing the oxygen we breathe. In this Snack, oxygen produced during photosynthesis makes leaf bits float like bubbles in water.
Full instructions for this activity are available at https://www.exploratorium.edu/snacks/photosynthetic-floatation
Science Snacks are hands-on activities, projects, and experiments that are designed for the classroom and the curious. They're cheap, simple, safe, scientifically accurate, and teacher tested. Want to see more? Check out http://exploratorium.edu/snacks.