Phytosynthesis

Bubbles shown on leaf swimming in a jar of water

Photosynthesis is a cycle.  Plants breathe in Carbon Dioxide (CO) and they breathe out Oxygen (O2). I know plants breathe out Oxygen because I observed a leaf in a jar of water with bubbles. We breathe in oxygen and breathe out carbon dioxide. Every 2nd breath you take comes from the ocean. The plants in the ocean are really tiny and they are called Phytoplankton.                        by Riley

by Tupou