Limiting Factors Of Photosynthesis

Question 1

Light intensity

Answer 1

Without enough light, a plant cannot photosynthesise very quickly, even if there is plenty of water and carbon dioxide. Increasing the light intensity will boost the speed of photosynthesis.

Question 2

Carbon dioxide

Answer 2

Sometimes photosynthesis is limited by the concentration of carbon dioxide in the air. Even if there is plenty of light, a plant cannot photosynthesise if there is insufficient carbon dioxide.

Question 3

Temperature

Answer 3

If it gets too cold, the rate of photosynthesis will decrease. Plants cannot photosynthesise if it gets too hot.

Question 4

Ways to conquer these limiting factors

Answer 4

Plants kept in Greenhouses.
Having a Controlled temperature so the greenhouse is always kept at a certain temperature.
Lights for night time photosynthesis.
The use of paraffin lamps inside a greenhouse increases the rate of photosynthesis because the burning paraffin produces carbon dioxide, and heat too.

Question 5

Name the three factors that affect photosynthesis

Answer 5

light intensity, carbon dioxide concentration and temperature.