Independent/ Dependent Variable

You want to measure the effect of different amounts of oxygen on the rate of yeast growth. What is the independent variable?

Amount of oxygen

What is the independent variable in the following sentence: The height of bean plants depends on the amount of water they receive.

Amount of water

What is the dependent variable in the following sentence: A study was done to find if different tire treads affect the braking distance of a car.

Braking distance

What is the control variable in the following sentence: A study was done to find if different tire treads affect the braking distance of a car.

Car

You want to test a new drug that supposedly prevents sneezing in people allergic to grass. What is the independent variable?

Drug

What is the dependent variable in the following sentence: The height of bean plants depends on the amount of water they receive.

Height of the bean plants.

What is the control? Students measured the temperature of the water at different depths in Lake Skywalker and found that the temperature varied.

Lake Skywalker

A florist wants to see if Product X will extend the life of cut flowers so that they last longer. What is the dependent variable?

Life of flowers

What is the control variable in the following sentence: The time it takes to run a mile depends on the person's running speed.

Mile

You want to see if playing music makes plants grow taller. What is the independent variable in this experiment?

Playing music

You want to test a new drug that supposedly prevents sneezing in people allergic to grass. What is the dependent variable?

Sneezing

Dependent Variable

The experimental factor that is being measured; the variable that may change in response to manipulations of the independent variable

Independent Variable

The experimental factor that is manipulated; the variable whose effect is being studied.

What is the independent variable in the following sentence: A study was done to find if different tire treads affect the braking distance of a car.

Tire treads

Orchids were studied to determine if the amount of humidity affected the flowering of these plants. Which of these was the independent variable in this study?

amount of Humidity

What is the control variable in the following sentence: The height of bean plants depends on the amount of water they receive.

bean plants

What is the control variable in the following sentence? The higher the temperature of the air in the oven, the faster a cake will bake.

oven/ cake

You think that a certain part of your brain is important in memory. To test this, you will remove this part of the brain from rats and see if they remember how to get through the maze. What is the dependent variable in this experiment?

remembering how to get through the maze

What is the independent variable in the following sentence: The time it takes to run a mile depends on the person's running speed.

running speed

What is the dependent variable in the following sentence: The time it takes to run a mile depends on the person's running speed.

TIME

An entomologist (bug scientist) wants to determine if temperature changes how many times a cricket chirps. What is the independent variable?

Temperature

What is the independent variable: Students measured the temperature of the water at different depths in Lake Skywalker and found that the temperature varied.

depth

You think that a certain part of your brain is important in memory. To test this, you will remove this part of the brain from rats and see if they remember how to get through the maze. What is the independent variable in this experiment?

removing a part of the brain

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

temperature

What is the independent variable in the following sentence: The higher the temperature of the air in the oven, the faster a cake will bake.

temperature of the oven

What is the dependent variable in the following sentence: The higher the temperature of the air in the oven, the faster a cake will bake.

the time it takes the cake to bake.

An entomologist (bug scientist) wants to determine if temperature changes how many times a cricket chirps. What is the dependent variable?

times a cricket chirps