Properties of Matter Review

Front

As a substance heats up, its molecules ___________________.

Back

speed up and get farther apart.

Front

True or False: If you have the same volume of two different substances, they may have different densities.

Back

True.

Front

Observation or Inference? The substance turned black when iodine was added.

Back

Observation.

Front

If you completely dissolve a powder into water, this is an example of a ___________ change.

Back

physical.

Front

Observation or Inference? The acid caused the surface to wear down.

Back

Inference.

Front

What is density?

Back

Density is the mass of a substance divided by its volume.

Front

What happens to the molecules of a substance when it cools down?

Back

The molecules slow down and get closer together.

Front

Define 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

Define a chemical change.

Back

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

Front

What is an observation?

Back

An observation is a statement based on what you see, hear, or measure.