They can make their own food using small inorganic molecules and light energy.

This process is called photosynthesis.Word equation:

Carbon dioxide+water glucose+oxygen

6CO2 + 6H2O C6H12O6 + 6O2

Raw materials products

Light

chlorophyll

Light

chlorophyll

10

How would you test for the importance of light ?

How would you test for the importance of CO2?

how would you test for the importance of chlorophyll?

Hint: Soda lime absorbs CO2

in air.

Hint:Variegated leaves have yellow areas with no chloroplasts.

How could you test the effect of:

Variable light intensities?

Variable CO2 concentrations?

Variable temperatures?

Nitrates: provide the plant with the nitrogen needed to make amino acids and thus proteins.

Magnesium: is needed to make chlorophyll.

Predict how soil with no nitrates /magnesium would affect plant growth.

O2 level falls