Review Physical and CHemical Properties and Changes

Front

What is a chemical change?

Back

A chemical change is a change that creates a new substance, often accompanied by the release of light or heat.

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What is the best example of a new substance forming?

Back

Lighting a match is the best example of a new substance forming.

Front

What are the signs of a chemical change?

Back

Signs of a chemical change include the release of light, temperature change, sudden color change, appearance of a solid, and gas given off.

Front

What is a physical change?

Back

A physical change is a change that affects an item's amount, size, or shape without altering its chemical composition.

Front

What is an example of a different substance being formed?

Back

Wood burning is an example of a different substance being formed.

Front

What is the difference between physical and chemical changes?

Back

Physical changes do not create new substances, while chemical changes do.

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What happens during a physical change?

Back

During a physical change, the form of a substance changes, but its chemical identity remains the same.

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Can a chemical change be reversed?

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Most chemical changes are not easily reversible, unlike physical changes.

Front

What is an example of a physical change?

Back

Melting ice is an example of a physical change.

Front

What is an example of a chemical change?

Back

Rust forming on iron is an example of a chemical change.