Hypotheses, Theories, and Laws

Hypotheses, Theories, and Laws Pt. 1

By Heidi Whitcher

Hypotheses

If the distance between a light source and an object decreases, then the size of the object's shadow will increase because the object will block out more light.

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*If you move your hand closer to the light source.​

Example

A possible explanation of or answer to a scientific question that is testable and based on prior knowledge or research.

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Definition

Multiple Select

For which of these questions could a testable hypothesis be developed? Check all that apply.

• Do different liquids freeze at the same rate?

• Do cookies taste better when they are baked in a gas oven or in an electric stove?

• Does temperature affect the strength of a magnet?

• Does the color of water affect how quickly it evaporates?

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When writing hypotheses, think of this formula. If the independent variable changes, then something will happen to the dependent variable because....[give explaination].

Examples:

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If the distance between a light source and an object decreases, then the size of the object's shadow will increase because the object will block out more light.​

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If the height of a ramp increases, then the speed of a car on the ramp will increase because the car will accelerate.​

If...then...because

Hypotheses Continued

Multiple Choice

Identify the variables in this hypotheses.

If the pressure of a gas is increased, then the volume will decrease because the particles of the gas will be forced closer together. The independent variable is

• pressure

• gas

• volume

• particles

Multiple Choice

Identify the variables in this hypotheses.

If the pressure of a gas is increased, then the volume will decrease because the particles of the gas will be forced closer together. The dependent variable is

• pressure

• gas

• volume

• particles