h2oh2o water. where is our water 97.5% of all water on earth is saltwater or brackish water. 1.75%...
TRANSCRIPT
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H2O
Water
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Where is our water
97.5% of all water on Earth is saltwater or brackish water.
1.75% of all water is frozen..75% of all of the water on Earth is available
for us to use.What is our main source for fresh water?
Groundwater
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(WATER CYCLE)
Hydrologic Cycle
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Vocabulary Review
Hydrosphere water
Lithosphere land
Atmosphere air
Biosphere organisms
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Steps in the Hydrologic Cycle
Precipitation Water falling from the sky
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Steps in the Hydrologic Cycle
Evaporation Liquid water turns into water vapor
Heat is added
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Steps in the Hydrologic Cycle
Condensation Water vapor turns in to liquid water
Heat is given off
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Heat transfer
When water changes states heat is transferred
Where does the energy come from? Where does it go?
Energy cannot be created or destroyed
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Steps in the Hydrologic Cycle
Runoff The flow of water over land
Powered by gravity
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Steps in the Hydrologic Cycle
Transpiration Water vapor given off by plants
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Surface water
Lakes, rivers, ponds
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Steps in the Hydrologic Cycle
Ground water the water located beneath the earth's surface in soil
pore spaces and in the fractures of rock formations
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Groundwater
VocabularyPorosity is a measure of how much of a rock
is open space. This space can be between grains or within cracks or cavities of the rock.
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Permeability is a measure of the ease with which a fluid (water in this case) can move through a porous rock.
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Aquifer
a body of saturated rock through which water can easily move.
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Water Table
The upper surface of the zone of saturationDigging in the sand
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Recharge
Refilling of the aquifersRain/snow percolates/seeps down in to the
porous rock
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Wetlands
An area of land that is saturated with water
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Wetlands
Wetlands help cleanse our water
Wetlands contain great biodiversity
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Natural Cleaning of the Water
Evaporation cleans the waterPercolation filters the waterWetlands filter the water
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Human Impact on Freshwater
PollutionBuildings/PavingDestruction of wetlands
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