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PS-0.2: 3 Kinds Of Variables
Test Description: Define, differentiate between IV, DV, and controlled variables
Instructions: Answer all questions to get your test result.
1) The variable that the experimenter deliberately changes is the
A
independent variable (IV)
B
control group
C
dependent variable (DV)
D
controlled variable
2) The variable that changes in response to the manipulated variable is the
A
independent variable
B
control group
C
controlled variable
D
dependent variable
3) A variable that is held constant in an investigation (not changed) is a
A
control group
B
dependent variable
C
controlled variable
D
independent variable
4) Name the dependent variable: Sam investigates the effect of temperature on movement in fish.
A
movement in fish
B
Sam
C
water level
D
temperature
5) Name the independent variable: Jen investigates the effect of age on hearing acuity.
A
Jen
B
hearing acuity.
C
volume of sound
D
age
6) Name a controlled variable: Ben investigates the effect of hours of sleep on test scores in 9th graders
A
test scores
B
9th graders
C
hours of sleep
D
Ben
7) Name the independent variable: Sue tests the effect of concentration of carbon dioxide on acidity of pond water.
A
temperature of water
B
concentration of carbon dioxide
C
acidity of pond water
D
Sue
8) If the independent variable is the cause, the dependent variable is the
A
starting point
B
manipulator
C
effect
D
first event
9) Name the dependent variable: Joe tested the effect of concentration of oxygen in the air on breathing rates in athletes.
A
breathing rates in athletes
B
altitude of sports arenas
C
Joe
D
concentration of oxygen in air
10) Name a controlled variable: Lee tested the effects of exercise on heart rate in ballet dancers.
A
heart rate
B
Lee
C
ballet dancers
D
exercise
*select an answer for all questions
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