Question

question 3 of 10 as water is cooled from 4°c to 0°c, its density ______ a. decreases b. increases c. decreases and increases d. stays the same

Explanation:

Water has a unique property. It reaches its maximum density at 4°C. As it is cooled from 4°C to 0°C, the water molecules start to form a hexagonal - lattice structure as ice begins to form, causing the volume to increase while the mass remains the same. Since density $
ho=\frac{m}{V}$, when $V$ increases and $m$ is constant, density decreases.

Answer:

A. decreases