Variables, Constants and Controls

In an experiment, constants should always be

• different

• the same

• kind of the same

• none of the above

This part in an experiment is the one being changed or manipulated by the scientist.

• dependent variable

• independent variable

• constants

• control

This part of the experiment where the independent variable is not present. It serves as comparison.

• independent variable

• control

• dependent variable

• constants

Mr. Fitch wanted to see how different types of music affected students' heart rates. He played different types of music: heavy metal, rap, R&B, alternative, pop, country, and classical music. Identify the independent variable.

• classical music resulted in the highest pulse rate

• types of music

• students' heart rate

• Mr. Fitch

Mr. Fitch wanted to see how different types of music affected students' heart rates. He played different types of music: heavy metal, rap, R&B, alternative, pop, country, and classical music. Identify the dependent variable.

• classical music resulted in the highest pulse rate

• types of music

• students' heart rate

• Mr. Fitch

Justin usually blows his nose using Kleenex tissues. His snot keeps leaking through the tissue. He decided he is going to create an experiment to find the best tissue brand. What would be 1 constant?

• amount of tissue

• type of tissue

• kleenex

• which one works better

Bryanna was investing how fast it took Julian to react to different sounds. Identify the dependent variable.

• different sounds

• how much time it took Julian to react

• playing the trumpet over and over

• Julian

Tags

NGSS.MS-LS1-8

Nicolas wanted to see how high an ice cube would float in different temperatures of water. Identify the dependent variable.

• temperature of the water

• size of ice cube

• how high the ice cube floated

• amount of water

Tags

NGSS.MS-PS1-4

Nicolas wanted to see how high an ice cube would float in different temperatures of water. Identify the independent variable.

• temperature of the water

• size of ice cube

• how high the ice cube floated

• amount of water

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

How many variables do we want to be testing at one time?

• 1
• 2
• 3
• 4

Tags

NGSS.MS-ETS1-4