Physical and Chemical Changes

Front

What is a physical change?

Back

A physical change is a change in appearance or form but no new substance is created.

Front

What is a chemical change?

Back

A chemical change is a change in which a new substance is formed.

Front

Which is NOT a sign of a chemical change?

Back

Change in shape is NOT a sign of a chemical change.

Front

What happens when a precipitate forms in a reaction?

Back

The formation of a precipitate indicates that a chemical change has occurred.

Front

What is one chemical property of chlorine?

Back

Chlorine reacts with sodium.

Front

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

Back

A physical change alters the form or appearance of a substance without changing its chemical composition, while a chemical change results in the formation of new substances.

Front

Give an example of a physical change.

Back

Melting ice is an example of a physical change.

Front

Give an example of a chemical change.

Back

Burning wood is an example of a chemical change.

Front

What are some signs of a chemical change?

Back

Signs of a chemical change include change in color, odor production, gas formation, and precipitate formation.

Front

What is a precipitate?

Back

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