TP Experiment

In the TP experiment, what was the independent variable?

• Time

• # of Pennies

• Brand of TP

• Water

Tags

NGSS.MS-PS2-2

In the TP experiment, what was the dependent variable?

• Time

• # of Pennies

• Brand of TP

• Water

Tags

NGSS.MS-PS2-2

The number of pennies was supposed to tell us what about the TP?

• The brand of the toilet paper.
• The number of sheets in a roll.
• The total budget for purchasing toilet paper.
• The Strength of the toilet paper.

Check all that apply. What are possible sources of error for this experiment? As in, why did not all groups get very similar results?

• Water droplet size depended on the "dropper" person

• Not waiting exactly 10 seconds to start putting pennies on

• The TP got mixed up by someone

• Not being able to get the rubber band completely around the square.

I thought it was a pretty good lab to review the scientific method. What did you think and how could it have been better?

What were some controlled variables/constants for all trials of this experiment? Check all that apply.

• Temperature of water.

• Amount of water in droplet (hopefully).

• Size of coin (penny)

• Cup size

• # of pennies

Good science only changes one independent variable at a time.

• True

• False

Tags

NGSS.MS-PS2-2

The variable that is measured. It is the result of the experiment.

• Controlled Variable

• Dependent Variable

• Independent Variable

What is the dependent variable of an experiment?

• this part of the experiment is used for comparison

• this is the group exposed to the factor being tested

• The effect (or lack of) you are looking for.

• The factor that is being changed in the experiment

Tags

NGSS.MS-PS2-2

An experiment is performed on plants to see how different amounts of water affect plant growth. Each plant in the experiment is given a different amount of water; 2 cups of water, 3 cups of water, and 5 cups of water. Each plant has the same amount of soil, sunlight, and listens to the same music. In this investigation, the dependent variable is ...

• The type of plant
• The height of the plant

• The type of music
• The amount of water

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1