1.3.A Variables Explained

1.3.A Variables Explained

By Braden Sparks

This is the variable that is manipulated or changed by the experimenters.

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Independent Variable (IV)

Multiple Choice

What is the Independent Variable?

• Variable that is changed by the experimenters

• Variable that changes based on the IV

• Variable that is measured by the scientist

• Things that never change

This is the variable that is being measured.

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The experimenters do NOT change this themselves. The dependent variable only changes in response to the IV.

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Dependent Variable (DV)

Multiple Choice

What is the difference between the IV and DV?

• DV is changed based on experimenters and IV is what the experimenters measure

• IV is changed based on experimenters and DV is what the experimenters measure

• They both are things that don't change throughout the experiment

• IV changes in response to the DV

Controls (Controlled Variables)

EVERYTHING else in the experiment MUST stay exactly the same.

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Example: If you want to test how long it takes a car to stop on a track. IV = The car you choose.

DV = how long it takes to stop.

Controls = weather, road conditions, type of brakes​

Multiple Choice

What is the example he uses to demonstrate IV, DV, and Contols?

• A runner who changes their training techniques.

• How fast a car goes down the track.

• A runner who changes out their shoes.

• Shoes, clothes, and track.

Multiple Choice

What would a good Controlled Variable be for that experiment?

• how fast he runs

• what shoes he wears

• the distance he runs

Multiple Choice

Which would NOT be an important controlled variable for that experiment?

• The weather

• The distance he runs

• The surface he runs on

• How fast he runs

Multiple Choice

Identify the IV in this scenario: Experimenters changed how far away from the beach they were. And they measured the temperature at each distance.

• Distance from the beach

• temperature

Multiple Choice

Identify the DV in this scenario: Experimenters changed how far away from the beach they were. And they measured the temperature at each distance.

• Distance from the beach

• temperature

Multiple Choice

What would an important Controlled Variable be for this experiment?

• temperature at each distance

• distance from the beach

• time of day

• there is no way to know