Chemical and Physical Changes

Front

What is a chemical change?

Back

A chemical change is a process where substances combine or break apart to form new substances with different properties.

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.

Front

Give an example of a chemical change.

Back

Burning wood is an example of a chemical change.

Front

Give an example of a physical change.

Back

Breaking a glass is an example of a physical change.

Front

What is a sign that a chemical reaction has occurred?

Back

Formation of a gas is a sign that a chemical reaction has occurred.

Front

What happens to water when it is heated to steam?

Back

When water is heated to steam, it undergoes a physical change.

Front

Is melting ice a chemical or physical change?

Back

Melting ice is a physical change.

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 change the substance's chemical identity.

Front

What is an example of a chemical change in cooking?

Back

Baking a cake is an example of a chemical change.

Front

What happens during a chemical change?

Back

During a chemical change, bonds between atoms are broken and new bonds are formed.