Use the following scenario to answer questions 30-33
Jane really likes basil. She decided to find a way to make the basil grow faster by designing an
experiment. Jane took eight basil seeds and planted them in 8 pots that all received equal
amounts of sun. Each day Jane gave each of the eight plants equal amounts of water. The eight
plants were divided into four groups, A-D. The two plants in Plant group A received only water.
Plants Group B, received a cup of Miracle-Gro solution mixed at 25% less than the
recommended concentration once a week in place of the water. Plants in group C, received
Miracle-Gro solution mixed exactly at the recommended concentration once a week in place of
water, and the two plants in group D, received a cup of Miracle-Gro solution mixed at 25% more
than the recommended concentration once a week in place of the water. After 30 days of
growth, Jane measured the height of each plant.
29 What is the independent variable in this experiment? (Hint: Recall that the independent
variable is the one that is different between groups)
30 What is the dependent variable in this experiment? (Hint: Recall that the dependent
variable is the one that is measured)
31 What is the control group in this experiment?
32 What variables were constant in the different groups?