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The variable that changes in response to the manipulated variable is the
breathing rates in athletes
dependent variable
age
movement in fish
controlled variable
concentration of carbon dioxide
effect
9th graders
If the independent variable is the cause, the dependent variable is the
breathing rates in athletes
dependent variable
age
movement in fish
controlled variable
concentration of carbon dioxide
effect
9th graders
Name the dependent variable: Sam investigates the effect of temperature on movement in fish.
breathing rates in athletes
dependent variable
age
movement in fish
controlled variable
concentration of carbon dioxide
effect
9th graders
Name the dependent variable: Joe tested the effect of concentration of oxygen in the air on breathing rates in athletes.
breathing rates in athletes
dependent variable
age
movement in fish
controlled variable
concentration of carbon dioxide
effect
9th graders
Name the independent variable: Sue tests the effect of concentration of carbon dioxide on acidity of pond water.
breathing rates in athletes
dependent variable
age
movement in fish
controlled variable
concentration of carbon dioxide
effect
9th graders
Name the independent variable: Jen investigates the effect of age on hearing acuity.
breathing rates in athletes
dependent variable
age
movement in fish
controlled variable
concentration of carbon dioxide
effect
9th graders
Name a controlled variable: Ben investigates the effect of hours of sleep on test scores in 9th graders
breathing rates in athletes
dependent variable
age
movement in fish
controlled variable
concentration of carbon dioxide
effect
9th graders
A variable that is held constant in an investigation (not changed) is a
breathing rates in athletes
dependent variable
age
movement in fish
controlled variable
concentration of carbon dioxide
effect
9th graders
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