JDES Physical and Chemical Changes

Front

What is a physical change?

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A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition. Examples include cutting, melting, and dissolving.

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What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances. It involves making or breaking bonds between atoms. Examples include rusting, burning, and cooking.

Front

What happens during a chemical reaction?

Back

During a chemical reaction, reactants are transformed into products, and new substances are formed.

Front

What is an example of a physical change?

Back

Cutting a red apple in half is an example of a physical change.

Front

What is an example of a chemical change?

Back

Rusting of a nail is an example of a chemical change.

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What indicates a chemical reaction has occurred?

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The formation of a new substance indicates that a chemical reaction has occurred.

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What happens when water is heated long enough?

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When water is heated long enough, it will evaporate.

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What is an endothermic reaction?

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An endothermic reaction is a type of chemical reaction that absorbs heat from its surroundings.

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What is an exothermic reaction?

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An exothermic reaction is a type of chemical reaction that releases heat to its surroundings.

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What is a reactant?

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A reactant is a substance that undergoes a chemical change in a reaction.