The Rate of Photosynthesis Flashcards

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1
Q

What 3 things is the rate of photosynthesis affected by?

A

The intensity of light, the volume of CO2 and the temperature

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2
Q

What do plants also need for photosynthesis?

A

Water

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3
Q

What are factors which affect the rate of photosynthesis called?

A

Limiting factors

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4
Q

What does ‘limiting factor’ mean?

A

It is a factor stopping photosynthesis from happening any faster

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5
Q

How would lack of light affect the rate of photosynthesis?

A

Light provides energy for the process

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6
Q

How does temperature affect the rate of photosynthesis?

A

If it is cold them enzymes will not work effectively

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7
Q

What type of conditions would volume of CO2 be a limiting factor?

A

In enclosed spaces e.g. a greenhouse

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8
Q

What can you do to work out the ideal conditions for photosynthesis

A

An experiment

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9
Q

What is a typical experiment to work out ideal conditions for photosynthesis?

A

Canadian pondweed experiment by measuring the amount of oxygen produced in a given time to work out how fast photosynthesis is happening

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10
Q

What factor has to be just right for photosynthesis?

A

Temperature

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11
Q

What happens if the temperature is too low?

A

The enzymes needed for photosynthesis will work very slowly (or not at all)

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12
Q

What happens if the temperature is too high?

A

The enzymes will become denatured and damaged

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13
Q

What is the independent variable in an experiment?

A

The thing being tested e.g. concentration of CO2

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14
Q

What is the dependent variable?

A

The one you measure e.g. volume of oxygen produced

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15
Q

How can you artificially create the right environment for photosynthesis?

A

In a greenhouse

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16
Q

How do greenhouses help photosynthesis?

A

They trap the suns heat, have artificial light, can increase the level of CO2, and keeping plants enclosed help them to stay undamaged from pests and diseases

17
Q

What is a common way to increase the level of CO2 in a greenhouse?

A

By using a paraffin heater to heat the greenhouse. At the paraffin burns it produces CO2 as a by-product

18
Q

Why do some farmers use fertilisers?

A

To provide minerals to the plant for a healthy growth