Factors Affecting Photosynthesis:

Question 1

Which factors affect the rate of photosynthesis?

Answer 1

Light intensity, carbon dioxide, and temperature.

Question 2

What type of factors are light intensity, carbon dioxide concentration, and temperature?

Answer 2

These are called limiting factors. If light or carbon dioxide is in short supply, or if the temperature is too low, then the rate of photosynthesis is limited.

Question 3

List different ways to measure the rate of photosynthesis:

Answer 3

You can measure the rate of photosynthesis by measuring how much oxygen or glucose a plant makes in a given time.

Glucose is used to produce new cells, so you can also measure the rate of photosynthesis by calculating the increase in biomass in a given time.

Question 4

What is the formula for calculating the rate of photosynthesis?

Answer 4

Rate = 1/t.
T = Time.

Question 5

List units of time you can use when working out rate of photosynthesis:

Answer 5

S -1
Min -1
H -1

Question 6

How does light intensity affect the rate of Photosynthesis?

Answer 6

The rate of photosynthesis will increase as light intensity increases. The graph will level out at the point when another limiting factor prevents any further increase in the rate of photosynthesis.

Question 7

How does Temperature affect the rate of Photosynthesis?

Answer 7

The rate of photosynthesis will increase as temperature increases until the optimum temperature is reached. The rate will then decrease as the temperature increases further. This is because the enzymes involved will become denatured.

Question 8

How does Carbon Dioxide Concentration affect the rate of Photosynthesis?

Answer 8

The rate of photosynthesis will increase as carbon dioxide concentration increases. The graph will level out at the point when another limiting factor prevents any further increase in the rate of photosynthesis.