what's unusual about water?

Answer 1

Two things are unusual about water.

1. Frozen water (ice) is less dense than liquid water, as a few answerers have already said. For every other liquid, the frozen form is more dense.

2. As it cools, water gets steadily denser until about 4 degrees C, then it gets slightly less dense as it cools to its freezing point at zero degrees C. Every other liquid just gets steadily denser and denser until it freezes.

Both of these unusual things are quite important for life on earth, but the second one is much more important than the first one.

Answer 2

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Answer 3

Water can exist as a gas, liquid and solid at the same time in the same location (picture a glacier by a stream, some vapor in the air). Water expands when it freezes, unlike other materials. Water is essential to life - it makes up ~70% of the human body. Without water life would not have come into being. It is the universal solvent.

Answer 4

Unlike most materials, it expands when frozen.

Answer 5

well it is a polar molecule as well its a bent shaped. pH is 7, expands when frozen

Answer 6

expands when frozen
close to being the universal solvent

Answer 7

It expands when it freezes. Most substances contract when they freeze.

Answer 8

you use it for almost everything! and unlike bathing in soda, it doesnt leave any sticky residue on your skin!

Answer 9

u need to drink it to live/survive

Answer 10

It doesnt catch fire or explode