Physical and Chemical Changes

Front

A change in which no new substances are formed is called a __________ change.

Back

physical

Front

A change in which new substances are formed is called a __________ change.

Back

chemical

Front

In a chemical reaction, the substances that react with each other are called the _____.

Back

reactants

Front

The new substances that are formed in a chemical reaction are called the _____.

Back

products

Front

Combustion is a __________ change in which a substance is heated in the presence of oxygen.

Back

chemical

Front

What is the main difference between physical and chemical changes?

Back

Physical changes do not create new substances, while chemical changes do.

Front

Give an example of a physical change.

Back

Melting ice is a physical change.

Front

Give an example of a chemical change.

Back

Burning wood is a chemical change.

Front

What happens to the chemical bonds during a chemical change?

Back

Chemical bonds are broken and new bonds are formed.

Front

What is a common indicator of a chemical change?

Back

Color change, gas production, or temperature change.