Independent Variable Dependent Variable Constants

What is the Independent Variable (IV) in the following testable question: Does the temperature of a tennis ball affect the height of its bounce?

• the temperature of tennis ball
• height of the bounce

Mrs. G set up an experiment to see how the type of ball affects the distance it rolls off a ramp.  Identify the Independent Variable in this experiment.

• distance traveled by the ball
• height of the ramp
• the type of ball

What is the Dependent Variable (DV) in the following testable question? Does a metal baseball bat vibrate more than a wooden baseball bat?

• the type of baseball bat
• the amount of vibration

Is the following question testable or non-testable? Which brand of popcorn leave the fewest unpopped kernels?

• Testable
• Non-Testable

The variable we measure to get our results the:

• Dependent Variable
• Independent Variable
• Constant

The variable we are changing/investigating in an experiment is the:

• Dependent Variable
• Independent Variable
• Constant

How many variables can be tested in a controlled experiment?

• one
• two
• three
• as many as possible

The variables in an experiment that stay the same are the:

• IV
• DV
• Constants

Why do we want to test one variable at a time?

• Because it is hard to setup a data table with more than one
• It keeps the experiment fair and you can see what caused the change
• It is what has always been done
• It makes the results better in an experiment

This variable in an experiment is the one being deliberately changed by the scientist. 

• dependent variable
• independent variable
• data
• control group