What is it?
Photosynthesis is how plants get energy from the Sun. Plants use the green pigment (chlorophyll) in their leaves to convert light energy from the Sun into chemical energy.
How Does It Work?
The leaves of a green plant absorb water, carbon dioxide, and sunlight. The plant then uses these substances and the chlorophyll in its leaves to produce sugars (or glucose) that the plant uses for food. During this process, the plant releases oxygen.
How Does It Help Us?
If plants did not photosynthesize, we would not be able to live! Plants use up the carbon dioxide that we exhale, and produce the oxygen that we need in order to breathe. We also use plants for food.
The simple story of photosynthesis and food - Amanda Ooten