water, water, water

water, water, water, water is everywhere. Water takes up more then 70% of the earth. That is 400 billion-billion Gallons of water on earth. that's a lot of water. water has many different properties Adhesion, Cohesion, Solvent, Specific heat, and surface tension. 

First there is adhesion it is the attractive force between molecules in one phase  and different molecules in another phase. Adhesion is what made it so we could move water from one cup over 3.4 meters to another cup. To do this we held the cup with the water up in the the air. then we poured it down a tight string to another cup. The molecules in the string and the molecules in the water stuck together and made it possible for the water to slide down the string to the other cup.


Next there is cohesion. Cohesion is the attractive forces between similar molecules in the same phase. Cohesion is what made it possible to stack 55 drops of water on one penny before it started flowing off the penny. There was a huge bubble on the penny and it was hanging over the edge of the penny but cohesion caused The water molecules to  stick together so it didn't fall over the edge. Another property that made putting 55 drops of water on one penny possible is surface tension. Surface tension is a property of the surface of a liquid that allows it to resist an external force.

Another is solvent. A solvent is a liquid which dissolves another substance without any change in its chemical composition. Hydrophilic is water loving. it will dissolve in water. hydrophobic is water fearing. It will not dissolve in water. For example oil. Oil will not dissolve in water it just floats on top. that's why the bp oil spill was so serious. If oil was water loving the oil spill wouldn't be a problem.

The last property of water is Specific heat. Specific heat is the amount of heat needed to raise the temperature of a 1 gram sample of water by one degree celsius. This makes it so the temperature in the ocean doesn't change from night and day.