Independent & Dependent Variables

In an experiment to test that a vitamin could extend a person's life-expectancy, then: lifespan would be the

dependent variable

In an experiment to test that a vitamin could extend a person's life-expectancy, then: the amount of vitamin that is given to the subjects within the experiment. This is controlled by the experimenting scientist.

independent variable

In an experiment to test how the amount of sunlight affects the growth of radishes. the amount of sunlight each plant receives.

independent variable

In an experiment to test how the amount of sunlight affects the growth of radishes. the growth fo the radishes is the

dependent variable

In an experiment to test the effect an insecticide has on keeping earwigs out of the house, the type of insecticide used is the

independent variable

In an experiment to test the effect an insecticide has on keeping earwigs out of the house, a number of earwigs out of the house

dependent variable

In an experiment to test the effect of sleep deprivation on student test scores, the amount of sleep a student would get nightly is the

independent variable

In an experiment to test the effect of sleep deprivation on student test scores, effect on the student's test scores would be the

dependent variable

The higher the temperature of the water the faster the egg will cook. The temperature is the

independent variable

The time it takes to run a mile depends on the time of day. The time it takes to run is the

dependent variable

Does drinking energy drinks make people more aggressive? Drinking energy drinks is the

independent variable

Does spending time with a family dog decrease the amount of stress someone is feeling? Spending time with the family dog is the

Independent variable

Does the tread of a tire affect the braking distance of a car. The breaking distance of the car is the

dependent variable

An investigation found that more bushels of potatoes were produced when the soil was fertilized more. Bushels of potatoes produced is the

dependent variable

Students measured the temperature of the water at different depths in Waldo Lake and found that the temperature varied. Depth is the

independent variable