state of matter 2

Which of the following best describes the process of sublimation?

• A gas turning directly into a liquid

• A solid turning directly into a gas

• A liquid turning into a gas at the surface

• A solid melting into a liquid

Answer explanation

Sublimation is the process of a solid turning directly into a gas, skipping the liquid phase.

What happens to the movement of particles in a liquid when it is cooled down to its freezing point?

• The particles gain energy and move faster.

• The particles stop moving entirely.

• The particles lose energy and move closer together.

• The particles expand and move farther apart.

Answer explanation

When a liquid is cooled to its freezing point, the particles lose energy and move closer together, leading to the formation of a solid structure.

Which of the following conditions must be met for water vapor to condense into liquid water?

• The temperature must increase significantly.

• The pressure must decrease significantly.

• Heat energy must be removed from the water vapor.

• Heat energy must be added to the water vapor.

Answer explanation

Heat energy must be removed from the water vapor.

What must be added or removed to change the state of matter?

• Light

• Heat

• Pressure

• Sound

Answer explanation

To change the state of matter, heat must be added or removed. This can cause substances to transition between solid, liquid, and gas states.

As liquid water heats up, particles escape from the surface, this is called ______________.

• boiling

• evaporation

• melting

• freezing

The energy of motion is called ___________.

• temperature

• kinetic energy

• heat

• friction

_____________ is when a gas turns into a liquid.

• freezing

• condensation

• melting

• evaporation

The process of a liquid turning into a solid is called ________.

• boiling

• condensation

• melting

• freezing

This is an example of particles in a _____.

• solid

• liquid

• gas

This is an example of particles in a _________.

• solid

• liquid

• gas