Liquid water is found in oceans, lakes, ponds, rivers, streams, as well as in the ground. Liquid water becomes a gas through evaporation , when subjected to heating. When very cold, the liquid water molecules slow down their movement, and through freezing, slowly become a solid, or ice and snow. Solid water can also become a gas through a process called sublimation . Of course, when solid water becomes liquid, this is called melting .
Water also has a powerful surface tension .
This is the tendancy for water molecules to stick tightly together very well. Water adheres well to other surfaces. They then rise up as invisible vapour or gas into the atmosphere, usually forming clouds. Every day an actively growing plant transpires 5 to 10 times as much water as it can hold at once. As water vapour rises, it cools and eventually condenses, or becomes liquid again.