Question

Water cools from 2°C to −2°C. During this time, what happens to the motion of the molecules?

a
The motion of the molecules remains the same.
b
The motion of the molecules stops.
c
The motion of the molecules decreases.
d
The motion of the molecules increases.

Answer 1

c. The motion of the molecules decreases. As the water cools, the molecules lose kinetic energy and therefore their motion decreases.