Chemical Reactions

Front

What is a chemical change?

Back

A chemical change is a process where one or more substances are transformed into new substances with different properties.

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What is a physical change?

Back

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

Front

What are indicators of a chemical reaction?

Back

Indicators include color change, odor change, gas production, and the formation of a precipitate.

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What is a molecule?

Back

A molecule is made up of two or more atoms bonded together.

Front

What happens during a chemical reaction?

Back

During a chemical reaction, bonds between atoms are broken and new bonds are formed, resulting in the creation of new substances.

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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.

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What is rusting an example of?

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Rusting is an example of a chemical change.

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What is combustion?

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Combustion is a chemical reaction that occurs when a substance reacts with oxygen, producing heat and light.

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What is the law of conservation of mass?

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The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.