Properties of Water:

Definitions:
  • Melting: water changing from solid to liquid.
  • Evaporating: water changing from liquid to gas.
  • Condensation: water changing from gas to liquid.
  • Freezing: water changing from liquid to solid.
  • Frost formation: water changing from gas directly to solid.
  • Sublimation: water changes from solid directly to gas.
  • Cohesion: when water molecules are attracted to other water molecules.
  • Adhesion: when water molecules are attracted to other materials.
  • Surface tention: the cohesion of water molecules at the surface opf the water.
  • Capillary action: when water in a straw uses adhesion to move up the straw defying gravity.

General Information:
Water has three distinct stages: Ice(solid), water(liquid), and water vapor(gas). Through freezing, melting, evaporating, condensation, frost formation, and sublimation water changes from one stage to another. When a piece of ice starts to get close to freezing it starts to expand and take in air until it freezes. The reason that ice floats is because it is less dense than liquid water. Infact if ice did not float in water then we would not be here because then when ice freezes on a body of water it woud freeze from the bottom up causing all life to die in the water, but since ice does float it has an opposite effect of creating a protective layer on top of the water and thus preserving the life beneath.
Stages of Water
Stages of Water
Another property of water is cohesion. This means that water attracts other water molecules. When you put a drop of water on a piece of wax paper it forms a sphere which has the least amount of surface area and this sphere is caused by the cohesion property of water. Cohesion is important in life because it causes the capilary action(explained below) which is uesd in plants to bring water up the stem to the other parts of the plant. Also a property of water and related to cohesion is surface tention which means that water has a surface that is able to hold up a small leaf or allow a water strider to glide accros the water.
Water Cohesion
Water Cohesion

Another property of water is adhesion. Adhesion is the attraction of water to other materials. This means that water will stick to other objects that it comes in contact with, like the spiderweb below. An important thing that adhesion helps is in the desert. When there is dew in the air early in the morning it is able to stick to the plants where it is then lick off by all sorts of wildlife that use it to survive.
Water Adhesion
Water Adhesion

Finnaly the last property of water is the capilary action. This action is where water moves up a straw or similar tube through adhesion to the object it is able to climb up above the surface of the water. This can be observed when you stick a straw inside a glass of water and a little bit of the water in the straw will move up it. This is a very important process in the plant kingdom because plants use the capilary action to move water up and down its trunk/stem to replenish the water supply in the other areas of its body.
The Capilary Action
The Capilary Action



Questions:
1. What property of water allows water to move up the stem of a plant?
A)Adhesion
B)Cohesion
C)Capilary Action
D)Surface Tention
2. Compare and contrast adhesion and cohesion.
3. What organism use the capilary action to move water?
A)Grass
B)Cat
C)Crow
D)Fly
4. Other than its use in consumption, how does water help living organisms survive?

Answers:
1. c
2. Adhesion is water sticking to other objects where cohesion is water sticking to other water.
3. a
4. It can create a protective layer of ice in a body of water or move up a tree using the capilary action.

Video:http://www.youtube.com/watch?v=4auXUSY9c54
Watch this video to see all the properties of water in action.
Summary:
This video showa all the properties of water above. You only need to watch the first 2:25 of the movie to get all the properties. It shows real life experiments thats shows the properties of water in full. I hope you like it.