Question

Please help... Only numbers 4,5 and 9

Answer 1

4:
Independent Variable: Photosynthesis
Dependent Variable: Starch

Starch is a product of photosynthesis. Without photosynthesis, starch cannot form. Therefore starch is dependent on photosynthesis.

5:
Independent Variable: Temperature
Dependent Variable: Animal Metabolism

Animal metabolism will only be affected if the temperature of the room changes. Therefore animal metabolism is dependent on temperature.

9:
Independent Variable: Rainfall
Dependent Variable: Thickness of growth rings

The thickness of the tree's growth rings are determined by the amount of rainfall. Therefore the thickness of growth rings are dependent on rainfall.