Properties of Matter UNIT

Front

What is density?

Back

Density is the mass of an object divided by its volume, typically expressed in grams per cubic centimeter (g/cm³).

Front

If you cut a bar of gold into pieces, what happens to its density?

Back

The density remains the same regardless of the size of the pieces.

Front

What is 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

What is a chemical change?

Back

A chemical change results in the formation of new chemical substances and involves a change in the chemical properties of the original substance.

Front

How do particles behave when the temperature of matter increases?

Back

The particles speed up and move farther apart.

Front

What happens to the density of a substance when it is heated?

Back

Generally, the density decreases as the substance expands when heated.

Front

What is the effect of increasing temperature on a chemical reaction?

Back

Increasing the temperature typically speeds up a chemical reaction.

Front

What is the definition of a gas?

Back

A gas is a state of matter that has no fixed shape or volume and expands to fill its container.

Front

What is true about the movement of gas particles?

Back

Gas particles move rapidly and are far apart from each other.

Front

What is the relationship between temperature and particle movement?

Back

As temperature increases, particle movement increases.