Water (H2O)
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By: Shane Cooley http://www.youtube.com/watch?v=CJ-AX1G0 SmY
description
Water (H2O). By: Shane Cooley http://www.youtube.com/watch?v=CJ-AX1G0SmY. The States of Water. Under 32 degrees Fahrenheit water is a solid. Between 32 and 212 degrees Fahrenheit, water is a liquid. The States of Water (continued). Above 212 degrees Fahrenheit water becomes a gas!! - PowerPoint PPT Presentation
Transcript of Water (H2O)
By: Shane Cooleyhttp://www.youtube.com/watch?v=CJ-AX1G0SmY
The States of WaterUnder 32 degrees Fahrenheit water is a solid.
Between 32 and 212 degrees Fahrenheit, water is a liquid.
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.
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.
CohesionWater is attracted to other water
molecules. This special bond between water molecules is called cohesion.
Example: Water drop
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.
Surface TensionSurface Tension is what we can call
the cohesive water molecules at the surface of water.
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.
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.
Where do we see convention currents?
Wind Patterns.
Ocean Currents.
Beneath the earth- heat sources in the earth’s mantle set up slow moving convention currents.
The sun’s surface.
Toxic Garbage IslandDid 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?
