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Name the independent variable: Sue tests the effect of concentration of carbon dioxide on acidity of pond water.
independent variable (IV)
ballet dancers
controlled variable
movement in fish
breathing rates in athletes
age
concentration of carbon dioxide
effect
If the independent variable is the cause, the dependent variable is the
independent variable (IV)
ballet dancers
controlled variable
movement in fish
breathing rates in athletes
age
concentration of carbon dioxide
effect
Name the independent variable: Jen investigates the effect of age on hearing acuity.
independent variable (IV)
ballet dancers
controlled variable
movement in fish
breathing rates in athletes
age
concentration of carbon dioxide
effect
The variable that the experimenter deliberately changes is the
independent variable (IV)
ballet dancers
controlled variable
movement in fish
breathing rates in athletes
age
concentration of carbon dioxide
effect
Name the dependent variable: Sam investigates the effect of temperature on movement in fish.
independent variable (IV)
ballet dancers
controlled variable
movement in fish
breathing rates in athletes
age
concentration of carbon dioxide
effect
Name a controlled variable: Lee tested the effects of exercise on heart rate in ballet dancers.
independent variable (IV)
ballet dancers
controlled variable
movement in fish
breathing rates in athletes
age
concentration of carbon dioxide
effect
Name the dependent variable: Joe tested the effect of concentration of oxygen in the air on breathing rates in athletes.
independent variable (IV)
ballet dancers
controlled variable
movement in fish
breathing rates in athletes
age
concentration of carbon dioxide
effect
A variable that is held constant in an investigation (not changed) is a
independent variable (IV)
ballet dancers
controlled variable
movement in fish
breathing rates in athletes
age
concentration of carbon dioxide
effect
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