Key Stage 1
Photosynthesis is how plants make their own food.
Key Stage 2
Photosynthesis is how plants make their own food using the energy from sunlight.
Key Stage 3
Photosynthesis is the process that takes place in the chloroplasts in plant cells which uses Carbon Dioxide and Water to produce Glucose and Oxygen by a series of chemical reactions using the energy transferred to the organism by sunlight.