What happens to the kinetic energy of particles as a substance changes from solid to liquid?
Correct Answer: Kinetic energy increases.
- Step 1: Understand that all substances are made of tiny particles that are always moving.
- Step 2: Know that in a solid, particles are closely packed together and vibrate in place.
- Step 3: When a solid heats up, it gains energy, which makes the particles move faster.
- Step 4: As the particles move faster, their kinetic energy increases.
- Step 5: Eventually, the particles gain enough energy to overcome the forces holding them together.
- Step 6: This process of changing from solid to liquid is called melting.
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