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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
control group
B
controlled variable
C
independent variable (IV)
D
dependent variable (DV)
2) The variable that changes in response to the manipulated variable is the
A
controlled variable
B
independent variable
C
dependent variable
D
control group
3) A variable that is held constant in an investigation (not changed) is a
A
control group
B
independent variable
C
controlled variable
D
dependent variable
4) Name the dependent variable: Sam investigates the effect of temperature on movement in fish.
A
water level
B
temperature
C
Sam
D
movement in fish
5) Name the independent variable: Jen investigates the effect of age on hearing acuity.
A
age
B
volume of sound
C
Jen
D
hearing acuity.
6) Name a controlled variable: Ben investigates the effect of hours of sleep on test scores in 9th graders
A
Ben
B
hours of sleep
C
9th graders
D
test scores
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
Sue
D
acidity of pond water
8) If the independent variable is the cause, the dependent variable is the
A
manipulator
B
starting point
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
altitude of sports arenas
B
Joe
C
concentration of oxygen in air
D
breathing rates in athletes
10) Name a controlled variable: Lee tested the effects of exercise on heart rate in ballet dancers.
A
ballet dancers
B
heart rate
C
Lee
D
exercise
*select an answer for all questions
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