Question

when solid ice cream becomes a liquid, what happens to the particles?
the particles gain energy and move faster.
the particles lose energy and move slower.
the particles remain the same and move at the same rate.

Explanation:

When solid ice cream melts (changes to a liquid), it absorbs heat energy. According to the kinetic - molecular theory of matter, when particles gain energy (in this case, heat energy), their kinetic energy increases. Kinetic energy is related to the motion of particles. An increase in kinetic energy means the particles move faster.

Answer:

The particles gain energy and move faster.