Question

How do water’s relative densities as a solid and a liquid differ from that of most other substances?

Water’s solid and liquid forms have similar densities, while most other substances have solid and liquid forms with different densities.
Water’s solid and liquid forms have different densities, while most other substances have solid and liquid forms with similar densities.
Water’s solid form is less dense than its liquid form, while the opposite is true of most other substances.
Water’s liquid form is less dense than its solid form, while the opposite is true of most other substances

Answer 1

1. Water’s solid form is less dense than its liquid form, while the opposite is true of most other substances.
For example, the Ice.
Notice that the ice is a solid form of the water but when you put the ice in the water, it floats. That makes it denser than the water itself. This happens because the hydrogen bonds cause the molecules to push farther apart with each other which result to lower density of the solid form of water.

Answer 2

The relative densities of the water as solid and liquid differ from the subsequent densities of the other substances. The density of the solid form of water is less than the density of water in its liquid form. However, majority of other substances increases in density when they solidify. This is the reason that the ice (which is the solid form of water) floats on water (liquid form).

Hence, the correct answer is 'Water's solid form is less dense than solid form while the case in opposite in other substances'.