At the Pool
When you think about water, whats the first thing that comes to your head? For me its being at a swimming pool or on a beach where the water is sparkling as the light reflects off the surface. But this is just water as a liquid; ice, steam and snow are all alternate forms of water.
When water is solid it is normally refereed to as ice or snow. In its solid form water is less dense than in its liquid form, which is unusual, meaning it takes up more space as a solid than liquid. This is why when water freezes in certain containers they may shatter, or break. This feature means that ice forms on top of a pond or river first, which allows the life underneath to carry on unaffected by the change.
This is water in its form at room temperature. It is tinted slightly blue, which can be seen more clearly when looking at it in large amounts, such as in the ocean. Another feature of water is that when it is pure containing no ions it is an insulator however we know water to be a conductor of electricity. This is because it is a good solvent is almost always has substances dissolved in it.
Most of us think of steam as the gas that comes off of boiling water but in fact this is not really steam as it mixes with cooler air. This gas is actually just small droplets of water that have condensed in the cooler air, steam is actually a colorless gas. In the USA 90% of power is generated through steam passing through turbines, the other use of steam is to heat vegetables at home.
Wikipedia Article Water
Wikipedia Article Steam
Google Definition Ions
Google Definition Insulator