There is much more water than land on the earth's surface. A waterfall is water falling from one level to a lower level. Water comes to the earth as rain or snow. Most of it goes back into the air. Fog or mist is a cloud on the ground.
Ice is very strong.
It holds you up when you skate on it if it is thick enough. Some Eskimos used to build temporary houses from blocks of snow and ice. If water gets into bottles, iron pipes, or cracks in rocks or pavements it can break them when it turns into ice because it expands when frozen. Hot water from our faucets is the same water as the cold but it is heated and stored in a hot water tank in our homes before we use it. Follow these links to pages which contain general information on the characteristics of water.