Question

At what temperature does water take up least space?

Answer 1

Answer:

30.2 degree Fahrenheit

Answer 2

Answer:

At 3.98°C water takes up least space.

Explanation:

The density of water changes with temperature.  At 0°C water freezes and forms a rigid open lattice structure. This reduces its density and makes it float causing it to occupy a large space.

At 3.98°C however, the mass of water remains the same but its volume decreases. This decreased volume increases its density. The same mass thus occupies a smaller space making the water more compact. Hence at this point at approximately four degrees Celsius it occupies the least space.