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 melting, freezing, and dissolving.

Front

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 digestion.

Front

Is melting butter for popcorn a chemical or physical change?

Back

Physical change.

Front

What are some signs of a chemical change?

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Signs of a chemical change include fizzing, foaming, color change, temperature change, and the production of gas or light.

Front

What happens during a chemical reaction?

Back

During a chemical reaction, reactants are transformed into products, resulting in the formation of new substances.

Front

Is digesting food a chemical or physical change?

Back

Chemical change.

Front

What is an example of a physical change?

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An example of a physical change is ice melting into water.

Front

What is an example of a chemical change?

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An example of a chemical change is cookies baking in an oven.

Front

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

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

Front

What is an example of a chemical reaction?

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An example of a chemical reaction is the combustion of gasoline in a car engine.