Why is water unlike the other matters?

Question

matter expands when heated and contracts when cooled except for water.Why?

Answer 1

It can be found in all 3 states (solid, gas, liquid).

Answer 2

this will answer ur question

http://www.iapws.org/faq1/freeze.htm

Answer 3

When water freezes and the molecules get too close together, hydrogen bonds pull the molecules into a crystalline structure.  The molecules end up oriented such that they are farther apart than they would be as water, but they are still firmly fastened by their bonds.  Almost no other compounds do this, and none to the same extent, because of the high difference in electronegativity between hydrogen and oxygen atoms.

Answer 4

Because water = H2o which can be found in three forms,

Ice which is cooled                                             (Solid form)

Water which is neutral, between 1-99Deg, approx (Liquid form)

and when water is boiled it evapourates 100deg+ (Gas Form )