Physical and Chemical Changes

Front

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. Examples include crumpling paper or melting ice.

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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 often involves a reaction that produces heat, light, or gas. Examples include wood burning and nail rusting.

Front

What happens during a physical change?

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During a physical change, the form or appearance of a substance changes, but its chemical identity remains the same.

Front

What happens during a chemical change?

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During a chemical change, the original substances are transformed into different substances with new properties.

Front

What are the three states of matter?

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The three states of matter are solid, liquid, and gas.

Front

Can you give an example of a physical change?

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An example of a physical change is freezing water to make ice.

Front

Can you give an example of a chemical change?

Back

An example of a chemical change is baking a cake, where ingredients react to form a new substance.

Front

What is rusting?

Back

Rusting is a chemical change that occurs when iron reacts with oxygen and moisture in the air, forming iron oxide.

Front

What is the difference between a physical change and a chemical change?

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A physical change does not create a new substance, while a chemical change does.

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What is an indicator of a chemical change?

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