Planning an experiment

What is the independent variable?

• The result or outcome that you measure in the experiment.

• The variable that you change in the experiment

• The variables that you control for in the experiment

Tags

NGSS.MS-PS2-2

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, and sunlight. In this investigation, the independent variable is ...

• The type of plant

• The amount of sunlight

• The type of liquid that is given to the plants

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

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 and sunlight. In this investigation, what are the controlled variables?

• Two control variables would be you would have to ensure that the plants have the same amount of solid and that they receive the same amount of sunlight

• Water, apple juice, milk

• Plant growth

Tags

NGSS.MS-ETS1-1

NGSS.MS-LS1-5

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 and sunlight. In this investigation, what is the dependent variable?

• Type of plant

• Water, apple juice, milk

• Plant growth

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. The dependent variable is the _____.

• Diameter of the ball

• Force acting on the ball

• How high the ball bounces

Tags

NGSS.MS-PS3-5

A student is planning an experiment to find out how the height from which he drops a ball from affects how high the ball bounces. What is one thing you have to control for in this experiment?

• You need to make sure you are using the same type of ball each time

• How high the ball bounces after it hits the floor

• Height above the floor that the ball is dropped from

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-1

NGSS.MS-PS3-5

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

• Distance traveled by the ball

• Height of the ramp

• Mass of the ball used in the experiment would be different.

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

• The distance the ball rolled off the ramp

• Height of the ramp

• Mass of the ball

Mr. S set up an experiment to see how the mass of a ball affects the distance it rolls off a ramp. What would be a controlled variable?

• Distance traveled by the ball

• The ramp must be always set at the same height each time the ball is rolled off the ramp

• Mass of the ball

John bought a flashlight from Walmart. He put different types of D-cell batteries in it to see which one lasted the longest. He found that Duracell batteries kept the flashlight lit the longest. What was the dependent variable?

• How long the batteries lasted when the light was on

• The type of battery used

• The type of flashlight used

Tags

NGSS.MS-ETS1-3