What is the variable being tested in this experiment?
Francis is conducting an experiment to determine
whether the acidity of ocean water affects the growth of
ocean plants. He has 10 aquariums, each containing the
same species of ocean plant. One has a pH of 8.2, the
approximate pH of the ocean. The others vary in acidity
from 0 to 14. Francis measures the growth of each plant
after one month. Each aquarium is kept at the same
temperature and receives the same amount of sunlight.
acidity or pH
O species of plant
temperature
amount of sunlight