Experimental Design

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

• Independent

• Dependent

• Control

• Constant

The type of variable that you change or manipulate in an experiment.  It is what you are testing.

• Independent
• Dependent
• Control

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-4

The parts of the experiment that must be kept the same.

• Constants
• independent
• Dependent

Tags

NGSS.MS-PS2-2

The purpose of the control group is:

• Used for comparisons
• Application of the I.V.
• Application both the I.V. and D.V.
• Application of all constants.

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.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

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

• The amount of water.
• The amount of soil.
• The height of the plant.
• The amount of water.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

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

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

Tags

NGSS.MS-PS2-2

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

Thomas tests different types of liquids to see which will grow his plants the most. He has water, soda, milk, and no liquid at all. What is the control group?

• Water

• Soda

• Milk

• No liquid

Tags

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2