Experiments and Variables Quiz

Samantha wants to know if music helps plants grow. She plays music for one plant but forgets to water the others.

• Good

• Bad

David tests which paper towel absorbs more water by using the same amount of water on each.

• Good

• Bad

Jorge wants to see if light affects sleep, so he asks 3 friends to sleep in different rooms but never checks how long they sleep.

• Good

• Bad

Luna tests if temperature affects how fast chocolate melts. She uses a timer and tries the same chocolate in hot and cold places.

• Good

• Bad

Emily wants to know if slime stretches more when cold. She uses different kinds of slime each time.

• Good

• Bad

Why is it important to change only one variable in an experiment?

Imagine you are testing which ball bounces higher. What would you do to make it a fair experiment?

What makes an experiment a “bad” experiment?