Chemical Reactions

Front

What is a chemical reaction?

Back

A process where substances (reactants) change into new substances (products) by breaking and forming bonds.

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What are reactants?

Back

Substances that undergo change in a chemical reaction.

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What are products?

Back

New substances formed as a result of a chemical reaction.

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What is a physical change?

Back

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

Front

What is a chemical change?

Back

A change that results in the formation of new chemical substances.

Front

What is an example of a physical change?

Back

Getting a haircut.

Front

What is an example of a chemical change?

Back

Rust forming on metal.

Front

What is a precipitate?

Back

A solid that forms and settles out of a liquid mixture during a chemical reaction.

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What does it mean when a substance loses transparency?

Back

It may indicate a physical change, but it is NOT a definitive sign of a chemical change.

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What is temperature change in a chemical reaction?

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A sign that a chemical change may have occurred, as energy is absorbed or released.