Photosynthesis is the reaction plants use to make their own food. Carbon dioxide from the air and water from the soil are changed into glucose and oxygen. The word equation is: carbon dioxide + water → glucose + oxygen. The reaction needs light, so light is written above the arrow.
You need to recognise the chemical symbols: CO2 for carbon dioxide, H2O for water, C6H12O6 for glucose and O2 for oxygen.
Photosynthesis is an endothermic reaction. This means energy is taken in from the environment. The energy is transferred from the environment to the chloroplasts by light. Chloroplasts are the parts of plant cells where photosynthesis happens.
