Question

which statement best describes why temperature rises when thermal energy is added to a substance?
o temperature rises because particles move more slowly.
o temperature rises because particles collide less often.
o temperature rises because particles move more quickly on average.
o temperature rises because the substance gains mass.

Explanation:

Temperature is related to the average kinetic energy of particles. When thermal energy is added, the average kinetic - energy of particles increases, causing them to move more quickly on average.

Answer:

Temperature rises because particles move more quickly on average.