Independent, Dependent, and Constant Variablea

The independent variable is the ONE thing you _?_.

• change

• keep the same

• experiment with

• investigate

Tags

NGSS.MS-PS2-2

The variable that you measure is the _?_.

• independent variable

• dependent variable

• constant variable

• repeated trial

How many independent variables can be tested in a controlled experiment?

• one
• two
• three
• as many as possible

What is a hypothesis?

• A hypothesis is the right answer to an experiment.

• A hypothesis is the wrong answer to an experiment.

• A hypothesis is an educated guess that is testable.

An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid; water, apple juice, or milk. Each plant has the same amount of soil, same amount of sunlight, and the same amount of liquid. In this investigation, what is the independent variable?

• type of plant

• different liquids

• plant growth

• amount of sunlight

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

Mr. S set up an experiment to see how the mass of a ball affects the distance it rolls off a ramp. Identify the dependent variable.

• distance traveled by the ball

• height of the ramp

• mass of the ball

Mr. S normally uses praise as a reward to train his dog. He wants to know the best way to train his dog, so he sets up an experiment to find out if there is a better way to get his dog to respond to commands. What is his dependent variable?

• type of reward

• praise

• type of dog

• amount of time the dog follows commands

Mr. S normally uses praise as a reward to train his dog. He wants to know the best way to train his dog, so he sets up an experiment to find out if there is a better way to get his dog to respond to commands. What is his constant variable?

• type of reward

• praise

• walking

• amount of time the dog follows commands

An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid; water, apple juice, or milk. Each plant has the same amount of soil, same amount of sunlight, and the same amount of liquid. In this investigation, the dependent variable is _?_.

• the type of plant

• the amount of sunlight

• growth of the plant

• the type of liquid

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

A student is planning an experiment to find out how the height from which he drops a ball affects how high the ball bounces. What is the constant variable?

• the ball used

• the height the ball bounces

• height of the ball being dropped