Question

multiple choice question
identify a true statement about the changes observed during the cooling of liquid water
there are more collisions between molecules
the volume of water decreases
the mass of the water increases
the water becomes less dense

Explanation:

When liquid water cools, its volume decreases due to the reduction in the kinetic - energy of water molecules which move closer together. According to the density formula $
ho=\frac{m}{V}$ (where $
ho$ is density, $m$ is mass and $V$ is volume), with mass remaining constant during cooling (no mass is added or removed in this simple cooling process), a decrease in volume leads to an increase in density. Also, fewer collisions occur between molecules as they slow down. The mass of the water remains the same as no matter is added or removed during cooling. So, the volume of water decreases as it cools.

Answer:

The volume of water decreases.