Scientific Method & Experimental Design

What are the 2 types of variables in a controlled experiment called?

• control & experimental

• independent & dependent

• independent & control

• experimental & dependent

What are the 2 groups in a controlled experiment called?

• control & dependent

• control & independent

• control & experimental

• control & hypothesis

How many independent variables are there in a controlled experiment?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS2-2

True or False:

A hypothesis is a question that you have about an experiment.

A scientist is doing an experiment to test the effect of water temperature on the heart rate of fish.

What is the dependent variable?

• water temperature

• heart rate of the fish

A scientist is doing an experiment to test the effects of vitamin E on hair growth.

What is the independent variable in the experiment?

• vitamin E

• hair growth

What is something that you can do to make your experimental

results more valid?

• repeat the experiment

• increase the sample size in your groups

• change more than 1 variable

• do not have constants in your groups

Tags

NGSS.MS-PS2-5

If I want to test the hypothesis that plants grow best when planted in organic soil, what are some things I would keep constant in both my control and experimental groups?

List as many constants as you can.