Amazing Water

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Amazing Water
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Water is

• Colorless
• Odorless
• Tasteless
• Amazing?

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Why is water important?

• Water is 70 of our total body weight
• 75 of the Earth is covered in water
• A person can live without food for more than a
  month but can only live without water for one
  week
• All cells contain water and most are bathed in it
• Many chemical reactions have water as a reactant
  or product
• Many reactions occur in water

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Some important terms

• Solute
• the substance that is dissolved
• Solvent
• the substance does the dissolving

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Chemical Properties of Water
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Property 1 Cohesion

• Water sticking to itself (similar to magnets).
• Think co-operate co-pilot

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Property 2 Surface Tension

• Water molecules crowd together near surfaces
  (push pull forces)

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Surface Tension
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Property 3 Adhesion

• Water sticking to something other than water
  (this is why water makes things wet)

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Property 4 Capillary Action

• Utilizing cohesive and adhesive forces, water
  also has the unique ability to rise upward
  against gravity
• (this is how plants get water to their leaves)