Variables in Experiments

Front

One thing that the experimenter changes on purpose

Back

Independent variable

Front

Something that changes as a result of the independent variable (often what is measured)

Back

Dependent variable

Front

A study was done to find if different tire treads affect the braking distance of a car. Independent variable?

Back

IV: different tire trends

Front

The time it takes to run a mile depends on the person's running speed. Independent variable?

Back

IV: running speed

Front

The height of bean plants depends on the amount of water they receive. Independent variable?

Back

IV: amount of water

Front

Students measured the temperature of the water at different depths in Lake Skywalker and found that the temperature varied. Independent variable?

Back

IV: depths of water

Front

Four groups of rats are first massed and then fed identical diets except for the amount of vitamin A they receive.

Back

IV: amount of vitamin A

Front

How does the distance from an eye chart affect the number of letters that are recognized on a line?

Back

IV: distance from the eye chart

Front

How does the amount of light affect the growth of a plant?

Back

IV: amount of light

Front

How does the amount of oxygen in the water affect the oyster population?

Back

IV: amount of oxygen