Physical and Chemical Changes

Front

What is a physical change?

Back

A physical change is a change in which the form or appearance of a substance changes, but its chemical composition remains the same. Examples include melting ice or breaking a glass.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances. Examples include rusting iron or burning wood.

Front

What happens to the molecules during a physical change?

Back

During a physical change, the molecules may move closer together or further apart, but they do not change their chemical structure.

Front

What happens to the molecules during a chemical change?

Back

During a chemical change, the molecules rearrange to form new substances with different properties.

Front

What is rusting?

Back

Rusting is a chemical change that occurs when iron reacts with oxygen and moisture in the air, forming iron oxide.

Front

What is an example of a solid turning into a liquid?

Back

An example of a solid turning into a liquid is ice melting into water.

Front

What is an example of a liquid turning into a gas?

Back

An example of a liquid turning into a gas is water boiling and turning into steam.

Front

What is melting?

Back

Melting is the process of a solid turning into a liquid when heat is added.

Front

What is boiling?

Back

Boiling is the process of a liquid turning into a gas when heat is added.

Front

What is condensation?

Back

Condensation is the process of a gas turning into a liquid when it cools down.