Photosynthesis

Do plants sleep? Yes. At night time, plants can not make food, so they shut down by closing their stomata.  Stomata tiny holes are on the bottom of leaves.

Animals inhale oxygen and exhale carbon dioxide. Green plants are the only plants that make oxygen and  food, this is called photosynthesis. Photosynthesis means ''putting together with light.'' This takes place in chloroplasts, which have chlorophyll (tiny green things) in them. Chlorophyll soaks up the sunlight. From sunlight, green plants combine carbon dioxide and water to make sugar and oxygen. Green plants use sugar to make starch, fats, and proteins. There are tiny pores called stomata. Oxygen and carbon dioxide enter and leave through the stomata.