⚪R.4: MIDTERM REVIEW: UNIT 2: MATTER: PART 1: 2D 16W S1 24

Front

What is the process called when a substance changes from a liquid to a gas?

Back

Vaporization.

Front

What is the boiling point of water at standard atmospheric pressure?

Back

100°C.

Front

What is a physical change? Give an example.

Back

A change that does not alter the chemical composition of a substance. Example: Bending pieces of gold to create jewelry.

Front

What is a physical property? Give an example.

Back

A characteristic of a substance that can be observed without changing its chemical identity. Example: Water boils into a gas at 100°C.

Front

According to the Kinetic-Molecular Theory, how do gas particles behave?

Back

Gas particles have motion that is constant, random, and rapid.

Front

What is the definition of matter?

Back

Anything that has mass and takes up space.

Front

What are the three main states of matter?

Back

Solid, liquid, and gas.

Front

What happens to the particles of a substance as it heats up?

Back

The particles move faster and may change state.

Front

What is condensation?

Back

The process by which a gas turns into a liquid.

Front

What is freezing?

Back

The process by which a liquid turns into a solid.