What is photosynthesis 

Photo= light


  1. Photosynthesis results in plants giving off oxygen, which is essential for many living organisms .
  2. Photosynthesis removes carbon dioxide from the air and prevents it from reaching a poisonous level.
  3. Photosynthesis provides food for most living organisms. 

How do plants photosynthesis?

For photosynthesis to take place

  • Plants take in carbon dioxide from the air through tiny pores on their leaves called stomata( singular stoma)
  • Plants take in water from the soil through their roots.
  • Sunlight is absorbed by the chloroplasts in the cells of the leaves of the plant.
  • The green pigment chlorophyll, in the chloroplasts, allows the carbon dioxide  ad water to combine to form glucose.
  • The energy for this reaction comes from sunlight.
  • Oxygen is released and given off as a waste product.

Photosynthesis as a chemical process.

  • Photosynthesis may be described as a process  because it involves a number of steps.
  • It is a chemical process because there are new substances formed.

Photosynthesis as a biological process.

  • Photosynthesis occurs in the chloropasts of living cells where enzymes that are essential to the process are present.
  • It is a biological process because it happens in living cells.