The Practice of Science

The variable in an experiment that stays the same.

• Independent Variable

• Dependent Variable

• Control Variable

The variable in an experiment that is tested.

• Independent Variable

• Dependent Variable

• Control Variable

Tags

NGSS.MS-PS2-2

The variable in an experiment that is measured.

• Independent Variable

• Dependent Variable

• Control Variable

The group in an experiment that does not receive treatment.

• Control group

• Independent group

• Dependent group

If I do not water my flowers then my flowers will die because flowers need water to survive.

What is this an example of?

• Observation

• Theory

• Law

• Hypothesis

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

In an experiment the ___________ variable is changed to test a hypothesis.

If I do not water my flowers then my flowers will die because plants need water to survive.

What are some controls in this experiment?

Check all that apply.

• Type of flower

• The growth of the flower

• Size of pot

• Amount of water

• Amount of sunlight

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Krusty was told that a certain new itching powder claims to cause 50% longer lasting itches. He buys the itching powder and compares it to his usual product. One test subject (A) is sprinkled with the original itching product and another test subject (B) is sprinkled with the Experimental itching powder. Subject (A) reported having itches for 30 minutes. Subject (B) reported to have itches for 45 minutes.

What is the independent Variable?

• Amount of time itches last

• Test Subjects

• Itching powder

Tags

NGSS.MS-PS1-2

Ari wants to test if temperature effects the sex of salamanders.

What would be the independent variable

• Temperature

• Eggs

• Sex of salamanders

Ari wants to test if temperature effects the sex of salamanders.

What would be the dependent variable?

• Eggs

• Temperature

• Sex of salamanders

• Time they take to hatch