Physical and Chemical Changes

Front

What is a physical change?

Back

A physical change is a usually reversible change in the properties of a substance, such as size or shape.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of one or more new substances.

Front

What are chemical properties?

Back

Chemical properties are characteristics that can only be observed when a substance changes into a different substance.

Front

What is an example of a physical change?

Back

An example of a physical change is melting ice.

Front

What is an example of a chemical change?

Back

An example of a chemical change is frying an egg.

Front

What is a sign that a chemical reaction has occurred?

Back

A sign that a chemical reaction has occurred is the formation of a gas.

Front

What happens to the molecules during a physical change?

Back

During a physical change, the molecules rearrange but do not change their chemical structure.

Front

What happens to the molecules during a chemical change?

Back

During a chemical change, the molecules break apart and form new molecules with different chemical structures.

Front

Is dissolving a physical or chemical change?

Back

Dissolving is generally considered a physical change.

Front

What is an example of a reversible change?

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An example of a reversible change is freezing and melting water.