Experimental Design

Ben observed that puddles outside seem to disappear more quickly when it is a sunny day. He decided to test this by setting up an experiment in which he placed a graduated cylinder with 10 ml of water in a dark closet and a graduated cylinder with 10 ml of water by the window. Each day he measured the amount of water.

What did Ben change in this experiment?

• the amount of sunlight on the water

• the amount of water in the cup

• the kind of cup

Tags

NGSS.MS-ESS2-4

Ben observed that puddles outside seem to disappear more quickly when it is a sunny day. He decided to test this by setting up an experiment in which he placed a graduated cylinder with 10 ml of water in a dark closet and a graduated cylinder with 10 ml of water by the window. Each day he measured the amount of water.

What did Ben keep the same in this experiment?

• the amount of sunlight on the water

• the amount of water in the cup

• the kind of cup

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

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

• Independent

• Dependent

• Control

Tags

NGSS.HS-PS1-5

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

• Independent

• Dependent

• Control

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

• Constants

• independent

• Dependent

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

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

• distance traveled by the ball

• height of the ramp

• mass of the ball

• ball type

Tags

NGSS.MS-PS3-1

When experimenting with the growth of a plant, a scientist uses three (of the same type of) plants, two different fertilizers, equal light, and equal water. What type of variable is the fertilizer?

• Dependent

• Independent

• Control

• Compound

Tags

NGSS.MS-ETS1-1

What are the number of times each level of the independent variable is tested?

• constants

• control

• trials

• dependent variable

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

• control

• constant

• independent variable

• dependent variable

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-4