I am a compound found naturally in Earth I control the Earths climate I am necessary for all life I am the universal solvent I am continuously recycled I defy gravity I am not a metal I have no nutrients ID: 313275
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Slide1
Who am I?
I am a compound found naturally in Earth
I control the Earth’s climate
I am necessary for all life
I am the universal solvent
I am continuously recycled
I defy gravity
I am not a metal
I have no nutrients
Who am I?Slide2
GroundwaterSlide3
Groundwater
Makes up 23% of Earth’s freshwater.
12% Shallow (we can reach)
11% Deep (out of our reach)Slide4
Underground Layers
When precipitation occurs, water often seeps down into the soil and trickles down in between particles of soil and through cracks and spaces in layers of rock. Slide5Slide6
Permeable and Impermeable
Permeable
layers allow water to travel through them.
Ex: sand, soil, gravel
Impermeable
layers do not allow water to travel through them.
Ex: clay, graniteSlide7
Permeability
Rate that liquids go through pore spaces
Increases with porosity (NOT ALWAYS TRUE)
Holes must connect
IMPERMEABLE- liquid can’t get throughSlide8
Permeable and Impermeable
Pores-
the spaces between rock which water can move through.
Different kinds of rock have different-sized pores. Slide9
Trapped water
When water reaches an impermeable layer, it is trapped and cannot go any further.
The water begins to fill up the spaces above the layer. Slide10
Saturated Zone
The area of permeable rock or soil that is totally filled with water. Slide11
Water Table
The top of the saturated zone.
Knowing the depth of the water table tells you how deep you must dig to reach the groundwater layer. Slide12
Unsaturated zone
The layers of rocks and soil above the water table.
Slide13
Aquifer
Any underground layer of rock or sediment that holds water is called an aquifer.
People often obtain drinking water from aquifers.
Water may stay in an aquifer for thousands of years before it well ever come to the surface!!!Slide14