Science

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1. 
   clane Teacher
   High School - 10th Grade

   Water molecules are attracted to each other because of their molecular structure (H2O). The attraction forms hydrogen bonds. Water molecules will stay stuck together until something weakens the bond. Soap is a good example of a substance that will weaken the hydrogen bonds in water.

   Water molecules bind not only to other water molecules, but also to other types of molecules. Attraction between two unlike substances such as water and glass is called adhesion. When water sticks to a surface, it is because of the forces of attraction between the two different substances involved.

   Cohesion is a force which holds a solid or liquid together, owing the attractions between molecules. Whereas adhesive forces attract different types of molecules, cohesive forces attract molecules within a substance. Cohesive forces decrease with temperature increases.

   Since paper can be considered a solid and water is a liquid the two can have a cohesive affect when paired.

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   Posted by clane on Monday April 7, 2008 at 1:13 PM
   
   

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