Plant Life - Photosynthesis | ThinkTac | Science Experiment

Photosynthesis is the core essence of all life on this planet! The ability of plants to use the Sun's energy, water and atmospheric carbon dioxide to produce food and oxygen is the reason other life forms - animals - exist on this planet. In this ingeniously designed TACtivity, we submerge small leaf disc pieces in a syringe filled with sodium bicarbonate solution, which is exposed to sunlight. The solution-filled leaves initially sink; however, as photosynthesis proceeds, oxygen is released into the interior of the leaf, which changes the buoyancy of the leaf disc - causing it to rise.