Juan did an experiment to study the rate of photosynthesis in the water plant Elodea. She placed a piece of
Elodea in a beaker of water and set the beaker 10 centimeters (cm) from a lisht source. Juan counted the
bubbles released from the plant every minute for five minutes (min). She repeated the process two more
times. First, she moved the light to 20 cm from the beaker, and then she moved the light to 30 cm from the
beaker. Juan's setup and data are shown below.
Number of Bubbles
Distance (cun)
(inn) 10 20 30
305
1
29 5 1
31 6 1 3
31 4 12
3042
What is the outcome variable (dependent variable) in this experiment?
A. the number of bubbles produced
B. the type of plant placed in the beaker
C. the distance of the light source from the plant
D. the amount of time the bubbles were counted
mal amount of notting soil was placed in three identical pots. Twenty petunia seeds were used. Three
. . .untvwere all nlaced on the