Formation of a New Substance

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What is a chemical change?

Back

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

Front

What evidence indicates a chemical change has occurred?

Back

Formation of a new substance, such as a precipitate, gas, or color change.

Front

What happens during the melting of a popsicle?

Back

It is a physical change where the solid (ice) turns into a liquid (water) without forming a new substance.

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True or False: A physical change can result in an entirely different substance.

Back

False. A physical change does not create a new substance.

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What is an example of a chemical change?

Back

Wood burning, which produces ash and smoke, indicating new substances are formed.

Front

What is a precipitate?

Back

A solid that forms and settles out of a liquid mixture during a chemical reaction.

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What does it mean when bubbles and fizzing occur in a reaction?

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It indicates a chemical change, often the production of gas.

Front

What is an example of a physical change?

Back

Melting ice, where the ice changes from solid to liquid but remains water.

Front

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

Back

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