Chemical Reactions

Front

What is a chemical reaction?

Back

A process in which atoms rearrange to form new substances.

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What is a property of a substance?

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Something that can be observed about a substance, such as color, smell, or boiling point.

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Front

What is a substance?

Back

Something that is made of all the same atoms or groups of atoms.

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What is a model in science?

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An object, diagram, or computer program that helps us understand something by making it simpler or easier to see.

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Front

In a chemical equation, where are the products located?

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On the right side of the arrow; they are the ending substances.

Front

What are reactants?

Back

The starting substances in a chemical reaction, found on the left side of a chemical equation.

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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.

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Front

What is an example of a physical change?

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Melting ice or boiling water, where the substance changes state but not its chemical composition.

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Front

What is an example of a chemical change?

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Rust forming on iron or burning wood, where the substance changes into a different substance.

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Front

What is a chemical equation?

Back

A symbolic representation of a chemical reaction, showing the reactants and products.

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