Chemical vs Physical Changes

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What is a physical change?

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A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition.

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What is a chemical change?

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A chemical change is a change that results in the formation of new chemical substances, involving a rearrangement of atoms.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

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Give an example of a physical change.

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An example of a physical change is water evaporating into water vapor.

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NGSS.MS-PS1-4

Front

Give an example of a chemical change.

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An example of a chemical change is burning wood, which produces ash and gases.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What are some indicators of a chemical change?

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Indicators of a chemical change include color change, temperature change, gas production, and the formation of a precipitate.

Tags

NGSS.MS-PS1-2

Front

What are some indicators of a physical change?

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Indicators of a physical change include changes in state (solid, liquid, gas), shape, and size.

Tags

NGSS.MS-PS1-4

Front

Is melting ice a physical or chemical change?

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Melting ice is a physical change.

Tags

NGSS.MS-PS1-4

Front

Is rusting of iron a physical or chemical change?

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Rusting of iron is a chemical change.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What happens to the chemical composition of a substance during a physical change?

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The chemical composition of a substance remains the same during a physical change.

Front

What happens to the chemical composition of a substance during a chemical change?

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The chemical composition of a substance changes during a chemical change, resulting in new substances.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5