h2oh2o water. where is our water 97.5% of all water on earth is saltwater or brackish water. 1.75%...
TRANSCRIPT
H2O
Water
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
(WATER CYCLE)
Hydrologic Cycle
Vocabulary Review
Hydrosphere water
Lithosphere land
Atmosphere air
Biosphere organisms
Steps in the Hydrologic Cycle
Precipitation Water falling from the sky
Steps in the Hydrologic Cycle
Evaporation Liquid water turns into water vapor
Heat is added
Steps in the Hydrologic Cycle
Condensation Water vapor turns in to liquid water
Heat is given off
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
Steps in the Hydrologic Cycle
Runoff The flow of water over land
Powered by gravity
Steps in the Hydrologic Cycle
Transpiration Water vapor given off by plants
Surface water
Lakes, rivers, ponds
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
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.
Permeability is a measure of the ease with which a fluid (water in this case) can move through a porous rock.
Aquifer
a body of saturated rock through which water can easily move.
Water Table
The upper surface of the zone of saturationDigging in the sand
Recharge
Refilling of the aquifersRain/snow percolates/seeps down in to the
porous rock
Wetlands
An area of land that is saturated with water
Wetlands
Wetlands help cleanse our water
Wetlands contain great biodiversity
Natural Cleaning of the Water
Evaporation cleans the waterPercolation filters the waterWetlands filter the water
Human Impact on Freshwater
PollutionBuildings/PavingDestruction of wetlands