Controls and Variables. Practice Test #2. Question #1: In a contolled experiment, the only difference between the control group and experimental group is. the control group is always given something the experimental group is always given some type of treatment
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Practice Test #2
In a contolled experiment, the only difference between the control group and experimental group is.....
the control group is always given something
the experimental group is always given some type of treatment
the experimental group will always change
the control group will always change
Janet is doing an experiment to see if the number of peanuts produced per plant changes when the amount of fertilizer given to the plants is changed. What is the DEPENDENT VARIABLE?
a. amount of fertilizer
b. number of peanuts per plant
c. type of fertilizer
Mary wants to find out whether plants produce more leaves when grown in red, blue, or green light. What is the DEPENDENT VARIABLE?
a. color of light
b. type of leaves
c. average number of leaves
d. none are correct
A scientist plants two rows of corn for experimentation. She puts fertilizer on row 1 but does not put fertilizer on row 2. Both rows receive the same amount of water and light intensity. She checks the growth of the corn over the course of 5 months. What is a constant (same every time) in this experiment?
a. Plant height
b. Corn without fertilizer
c. Corn with fertilizer
d. Amount of water & sunlight