Question

question 17 of 25
you are investigating how salt affects the growth of mold on food. using slices of bread as the food, you create experimental groups treated with 0 mg, 10 mg, or 50 mg of salt. each day you make observations and record whether any of the groups are showing signs of mold growth.
what is the independent variable in this experiment?
a. the growth of mold
b. the slices of bread
c. the amount of salt used
d. the food treated with 0 mg of salt

Explanation:

In an experiment, the independent variable is the factor that is deliberately changed or manipulated. Here, the amount of salt (0 mg, 10 mg, 50 mg) is being changed to observe its effect on mold growth.

Answer:

C. The amount of salt used