Physical and Chemical Changes

Front

What is a change in matter that forms a new substance?

Back

Chemical change

Front

What is an example of melting?

Back

Heating a block of ice until it all turns to water

Front

True or False: When changing a liquid to a solid thermal energy is removed for freezing.

Back

True

Front

What is a change in size, shape, or matter that does not create something new?

Back

Physical change

Front

True or False: The state of matter cannot be changed depending on whether heat is added or removed.

Back

False

Front

What is a physical change?

Back

A change that affects one or more physical properties 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

Give an example of a chemical change.

Back

Rusting of iron.

Front

What happens to the molecules during a physical change?

Back

The molecules rearrange but do not change their chemical structure.

Front

What happens to the molecules during a chemical change?

Back

The molecules break apart and form new molecules.