A quantity of water at 0 °C is heated to 30 °C. For each degree rise in temperature, its density will?

A. rise steadily
B. fall steadily
C. fall and then rises
D. rise and then falls

Correct Answer:

Option B – fall steadily

Explanation

When a liquid or gas is heated, the molecules move faster, bump into each other, and spread apart.

This is Because the molecules are spread apart, and they take up more space. They are less dense.