B8.2 Rates Of Photsynthesis

Question 1

What are the three limiting factor of photosynthesis ?

Answer 1

Light, carbon dioxide and temperature

Question 2

What other factors could influence the rate of photosynthesis ?

Answer 2

Amount of chlorophyll in the leaf

Question 3

What does increasing the light do ?

Answer 3

It’s a limiting factor

Flat: light no longer increases photosynthesis so something else must be limiting

Question 4

What does increasing carbon dioxide do ?

Answer 4

Increasing: CO2 is the limiting factor

Flat: CO2 no longer increases photosynthesis meaning something else must be a limiting factor

Question 5

When investigating the effect of light on photosynthesis what are the independent ( what we measure) and dependent ( what we change) variables?

Answer 5

Independent: number of bubbles
Dependant: lamp distance

Question 6

What are the control variables ?

Answer 6

Temperature and CO2 concentration