Question

the passage below describes an experiment. ron had ten mint plants on his back porch. he grew each plant in its own pot, and each pot was the same size and shape. ron noticed that his plants did not grow many leaves, and he wanted to see if earthworms could help them grow more. to test this idea, he divided the ten plants into two equal groups. for one group, he added three earthworms to the soil in each pot. for the other group, he added no earthworms to the pots. two months later, ron counted the number of leaves on each of the ten plants. he compared the number of leaves on the plants in each group. identify the independent variable and dependent variable in this experiment. the number of earthworms the number of leaves independent variable dependent variable

Explanation:

The independent variable is what the experimenter changes. Ron changes the number of earthworms in the pots. The dependent variable is what is measured as a result of the change in the independent variable. Ron measures the number of leaves on the plants.

Answer:

Independent variable: the number of earthworms
Dependent variable: the number of leaves