Photosynthesis is when plants are using the sun to produce food.
There are two steps to photosynthesis. The first step is called electron transport chain. Step 1 takes place in the thylakiod membrane of the cholroplast This step needs light and is called light dependent.
These are the chloroplasts in a plant cell.
During this step a water molecule is split into H+ and oxygen.
Light hits photo system 2 and an electron is excited. The electron moves 2 photo system 1 where light excites it again.
2 Energy molecules are made: ATP and NADPH. These molecules are used in step 2 of photosynthesis
Step 2 of photosynthesis is called the Calvin Cycle. This step does not need light and is called light independent.
Choroplasts are in the leaf cells.
CO2 enters the Calvin Cycle and is used to make glucose. Glucose is a sugar that provides food for the plant. It takes 6 turns of the Calvin Cycle to make 1 glucose molecule.