Environmental factors that affect the rate of photosynthesis

Question 1

Four main factors affect the rate of photosynthesis:

Answer 1

amount of sunlight energy/light intensity, concentration of carbon dioxide, temperature and water. The rate of photosynthesis is limited by which of these factors is in the shortest supply. This factor is known as the limiting factor.

Question 2

Light

Answer 2

limits the rate between dusk and dawn, and also during the winter months in temperate climates

Question 3

Temperature

Answer 3

limits the rate during the winter months in temperate climates.

Question 4

Water

Answer 4

llimits the rate during the dry season in tropical climates and when the ground is frozen in temperate climates

Question 5

Carbon dioxide

Answer 5

limits the rate during the day in most climates since the concentration of carbon dioxide in the air is very low, i.e. about 0.04%.