Chemical and Physical Changes Review

Front

What is a chemical change?

Back

A process where substances combine or break apart to form new substances with different properties.

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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

What happens to the mass of substances during a chemical reaction?

Back

The mass of the reactants equals the mass of the products; they both weigh the same.

Front

What is an example of a chemical change?

Back

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

Front

What is an example of a physical change?

Back

Melting ice into water is an example of a physical change.

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What is a new substance?

Back

A substance that is formed as a result of a chemical change, having different properties from the original substances.

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What does qualitative mean?

Back

Descriptive information that cannot be measured, such as color or texture.

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What does quantitative mean?

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Information that can be measured and expressed numerically, such as weight or height.

Front

What is the law of conservation of mass?

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In a chemical reaction, mass is neither created nor destroyed; it is conserved.

Front

What is an example of a mixture?

Back

A salad is an example of a mixture, as it contains different substances that retain their properties.