Water%20(H2O)

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Water (H2O)

• By Shane Cooley
• http//www.youtube.com/watch?vCJ-AX1G0SmY

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The States of Water

• Under 32 degrees Fahrenheit water is a solid.
• Between 32 and 212 degrees Fahrenheit, water is a
  liquid.

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The States of Water (continued)

• Above 212 degrees Fahrenheit water becomes a
  gas!!
• Example- when boiling water you can see the steam
  rising above the water.

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Changing From One State To Another

• Melting- water changes from a solid to a liquid.
• Evaporating- water changes from liquid to a gas.
• Condensation- water changes from gas to a liquid.
• Example Water droplets on a cold glass of water.
• Frost- water changes from gas directly to a
  solid.
• Example Frosty early morning grass.

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Cohesion

• Water is attracted to other water molecules. This
  special bond between water molecules is called
  cohesion.
• Example Water drop

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Why is Water Cohesive?

• The oxygen molecules in water have a - charge and
  the hydrogen molecules in water have a charge.
• The hydrogen molecules in water are attracted to
  the oxygen molecules and this creates the waters
  interesting cohesive properties.

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Surface Tension

• Surface Tension is what we can call the cohesive
  water molecules at the surface of water.

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Different temperatures of water have different
properties!

• Cold water molecules are so cold that it
  restricts there movement thus making the
  molecules stick together making cold water more
  dense.
• Hot water contains more energy which makes the
  molecules more excited then cold water. This in
  turn makes the molecules move faster which makes
  the water less dense because there is more space
  between molecules.

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Convection Currents!!!!

• Convection Currents transfer heat through fluids,
  which is a liquid or gas!!
• The fluid circulation that we see in convection
  currents carries energy from the heat source to
  the other portions of the fluid.

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Where do we see convention currents?

• Wind Patterns.
• Ocean Currents.
• Beneath the earth- heat sources in the earths
  mantle set up slow moving convention currents.
• The suns surface.

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Toxic Garbage Island

• Did you know there is giant garbage patch about
  two times the size of Texas that floats in
  between Hawaii and San Francisco?
• Scientists estimate that it weights about 3.5
  billion tons and consists of 80 plastic!
• BUT HOW AND WHY?

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