Chemical and Physical Change

Front

What is a Chemical Change?

Back

A process where substances combine or break apart to form new substances, often accompanied by energy changes.

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What is a Physical Change?

Back

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

Front

Example of a Chemical Change?

Back

Burning wood, rusting iron, or milk souring.

Front

Example of a Physical Change?

Back

Melting ice, dissolving sugar in water, or breaking a glass.

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What happens during a Chemical Change?

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Atoms rearrange to form new substances, and energy is often released or absorbed.

Front

What happens during a Physical Change?

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The form of a substance changes, but its chemical identity remains the same.

Front

Is burning paper a chemical or physical change?

Back

Chemical change.

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Is freezing water a chemical or physical change?

Back

Physical change.

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What is an indicator of a Chemical Change?

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Color change, temperature change, gas production, or formation of a precipitate.

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What is an indicator of a Physical Change?

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Change in state (solid, liquid, gas) or shape without new substances forming.