Chemical and Physical Changes

Front

What is the melting point?

Back

The temperature at which a solid becomes a liquid; it is a physical property.

Front

What happens when water is heated and changed to steam?

Back

This is a physical change, as the state of matter changes from liquid to gas without altering the chemical composition.

Front

What does it mean when iron rusts?

Back

This is a chemical change, as it involves a reaction with oxygen that alters the chemical structure of iron.

Front

What is a physical change?

Back

Any change in the state of matter of a substance without changing its chemical composition.

Front

What is a chemical change?

Back

A change that results in the formation of new chemical substances.

Front

Is boiling water a physical or chemical change?

Back

Boiling water is a physical change because it changes from liquid to gas without changing its chemical composition.

Front

What is an example of a chemical change?

Back

Milk souring is a chemical change due to the formation of new substances.

Front

What is an example of a physical change?

Back

Melting ice is a physical change as it changes from solid to liquid without altering its chemical structure.

Front

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

Back

A physical property can be observed without changing the substance's identity, while a chemical property can only be observed during a chemical reaction.

Front

What happens during a chemical reaction?

Back

Atoms rearrange to form new substances, which is a characteristic of a chemical change.