As the temperature of a substance increases, what happens to the motion of its particles?

• A. The particles move slower and have less kinetic energy.
• B. The particles stop moving completely.
• C. The particles move faster and have more kinetic energy.
• D. The particles lose mass.

Answer: (C)

Verified step by step guidance

1. Understand that temperature is a measure of the average kinetic energy of the particles in a substance.
2. Recall that kinetic energy of particles is related to their motion; as kinetic energy increases, particles move faster.
3. Recognize that when temperature increases, the average kinetic energy of the particles also increases.
4. Conclude that with higher temperature, particles move faster because they have more kinetic energy.
5. Note that particles do not lose mass or stop moving completely as temperature changes; these options are incorrect.