States of Matter and Thermal Energy

What is the main factor that determines the state of matter?

• Thermal energy

• Color of the substance

• Size of the particles

• Shape of the container

Which state of matter has a definite shape and volume?

• Solid

• Liquid

• Gas

• Plasma

What happens to the particles of a solid when it is heated?

• They gain energy and move faster

• They lose energy and slow down

• They stop moving

• They move in a fixed pattern

What is the process called when a liquid turns into a gas?

• Evaporation

• Condensation

• Freezing

• Melting

Which of the following is an example of condensation?

• Water vapor turning into droplets on a cold glass

• Ice melting into water

• Water boiling into steam

• Liquid water freezing into ice