Question

what happens to the particles of a substance as its temperature increases?
○ they move faster.
○ they move slower.
○ they lose some energy.
○ they move in a circular direction.

Explanation:

Temperature is a measure of the average kinetic energy of a substance's particles. When temperature increases, the particles gain kinetic energy, causing them to move at a faster rate. The other options are incorrect: higher temperature does not slow particles, reduce their energy, or restrict their motion to a circular direction.

Answer:

A. They move faster.