Experimental Design

What is a factor that is measured for change in an experiment?

• control
• constant
• independent variable
• dependent variable

How many variables should you change in an experiment?

• none
• 1
• 2 or more
• depends on the type of experiment

The variable in an experiment deliberately changed by the scientist. The variable being tested.

• dependent variable
• independent variable
• data
• control group

If you were testing how well different dish soaps cleaned grease, the independent variable would be the:

• dish type
• amount of grease
• dish soap type
• grease type

The variable that depends on changes to the independent variable. 

• control group
• dependent variable
• experimental variable
• independent variable

Dory set up an experiment to see how the mass of a ball affects the distance it rolls off a ramp. What is the dependent variable?

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

A factor in an experiment that stays the same.

• control group
• constant
• dependent variable
• experimental group

Three baseball players investigate to see who can throw a baseball the farthest. They mark off an area on the playground for their investigation. Which should they keep constant?

• height of the players
• color of the balls thrown
• order in which the players throw
• spot from which the players throw

The type of variable that responds to the experiment and is what you measure to determine if your hypothesis is true.

• Independent
• Dependent
• Control

If I water the plant more often, then it will grow taller.  Name the independent variable.

• The height of the plant
• The size of the pot
• The amount of water
• The amount of light.