Question

1. trevor wanted to find out what fertilizer worked best for growing marigolds. he put miracle grow on one, scotts fertilizer on one, and no fertilizer on another.

a. independent variable (iv):
b. dependent variable (dv):
c. control:

Explanation:

Part a: Independent Variable (IV)

The independent variable is the factor that is manipulated in an experiment. Here, Trevor is testing different fertilizers (Miracle Grow, Scotts fertilizer, and no fertilizer), so the type of fertilizer is what he changes.

The dependent variable is what is measured or observed to see the effect of the independent variable. Trevor wants to see how well marigolds grow, so the growth of marigolds depends on the fertilizer used.

The control group is the one with no manipulation (or the standard to compare against). Here, the marigold with no fertilizer is the control as it provides a baseline to see the effect of the fertilizers.

Answer:

Type of fertilizer (Miracle Grow, Scotts fertilizer, no fertilizer)

Part b: Dependent Variable (DV)