Understanding the Particle Model and Its Implications

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

• They vibrate faster and move apart slightly.

• They move closer together.

• They stop moving.

• They change into a liquid.

What is the term used to describe the process when a substance takes up more space as it is heated?

• Contraction

• Expansion

• Condensation

• Evaporation

How does the volume of a substance change when it is cooled?

• It increases.

• It remains the same.

• It becomes zero.

• It decreases.

Which of the following is true about the relationship between temperature and volume?

• Temperature has no effect on volume.

• Higher temperature leads to contraction.

• Lower temperature leads to expansion.

• Higher temperature leads to expansion.

What happens to the density of a substance when its volume decreases but its mass remains constant?

• Density increases.

• Density remains the same.

• Density becomes zero.

• Density decreases.