[header] How to explain photosynthesis [title] Discuss how plants create oxygen. [step] Photosynthesis is the process by which plants convert the sun's energy into chemical energy. The series of reactions used to do this conversion (referred to collectively as photosynthesis) creates molecular oxygen, o. this oxygen, which is critical for all other life on the planet, is released into the atmosphere. 
[substeps] If you are teaching children, you can summarize this by saying that plants take in the carbon dioxide that we breathe out, and turn it into oxygen. [title] Point out that plants create carbohydrates.