States of Matter Unit 2

Front

What is matter?

Back

Matter is anything that has mass and takes up space.

Front

What are the three main states of matter?

Back

The three main states of matter are solid, liquid, and gas.

Front

What is thermal energy?

Back

Thermal energy is the total energy of all the particles in a substance, related to temperature.

Front

How does temperature affect the movement of particles in a substance?

Back

As temperature increases, particles move faster; as temperature decreases, particles move more slowly.

Front

What is the freezing point of water?

Back

The freezing point of water is 0°C.

Front

What is the boiling point of water?

Back

The boiling point of water is 100°C at standard atmospheric pressure.

Front

What happens to the volume of a gas when it is heated?

Back

When a gas is heated, its volume typically increases if the pressure remains constant.

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

Front

What is the relationship between mass and thermal energy?

Back

The more mass a substance has at the same temperature, the more thermal energy it contains.

Front

What is condensation?

Back

Condensation is the process by which a gas turns into a liquid when it cools.