Factors Affecting Photosynthesis

 

You need to know how the following factors affect photosynthesis:

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(Add graphs to illustrate)

 

In higher tier papers you may be asked to use tangents on graphs to find rate.

 

(Add diagram.)

 

You need to be aware of this equation:

Inverse square law: Light intensity = 1 ÷ distance²

 

Farmers use green houses to give plants optimal conditions for maximum photosynthesis (HT)  

1. Control light, CO₂, temperature → remove limiting factors  

2. Maximise growth → maximise profit  

3. Balance heating cost vs yield

 

Required Practical 6: Pondweed + lamp → count oxygen bubbles at different distances

 

You need to be aware of the following uses of glucose from photosynthesis:

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Important fact: Nitrates in the soil are used for protein synthesis as proteins require nitrogen to be built.