Experimental Design

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

• dependent variable
• independent variable
• data
• control group

The summary at the end of an experiment that explains the results. 

• conclusion
• procedures
• materials
• responding variable

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

Tags

NGSS.MS-PS2-2

A factor in an experiment that stays the same.

• control group
• constant
• dependent variable
• experimental group

In the experiment pictured, a student is testing the effect of the amount of fertilizer on plant growth.  What is the independent variable?

• amount of water
• amount of fertilizer
• the type of plant
• the size of the plant container

In the experiment pictured, a student is testing the effect of the amount of fertilizer on plant growth.  Which of the following is NOT a constant in the experiment?

• amount of water
• angle of light
• type of plant
• amount of fertilizer

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

NGSS.MS-LS2-4

What is the RANGE of this data

• 40
• 95
• 90
• 100

Tags

NGSS.HS-LS3-3

Squidward found new reeds to try out for his clarinet.  He used an APPLAUSOMETER to measure applause after playing "Under the Sea" with each reed.  The results were put in the table.
What was the dependent variable?

• The Song
• The Reed
• The Applause
• The instrument

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?
(Hint: The DV is the variable being counted or measured.)

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

Tags

NGSS.MS-PS2-2

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

• dishes type
• amount of water
• dish soap type
• grease type