Physical and Chemical 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.

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

Give an example of a physical change.

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Melting ice is an example of a physical change.

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NGSS.MS-PS1-4

Front

Give an example of a chemical change.

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Burning wood is an example of a chemical change.

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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 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 changes during a chemical change, resulting in new substances.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

Is rusting of iron a physical or chemical change?

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Rusting of iron is a chemical change.

Tags

NGSS.MS-PS1-5

Front

Is boiling water a physical or chemical change?

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Boiling water is a physical change.

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NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

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What is an indicator of a chemical change?

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

Tags

NGSS.MS-PS1-2

Front

Are hard boiled eggs a physical or chemical change?

Back

Hard boiled eggs represent a chemical change.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5