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The Water Cycle

The Water Cycle. Continuous movement of water from the atmosphere to the earth’s surface and back to the atmosphere again. Water Cycle (aka Hydrologic Cycle).

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The Water Cycle

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  1. The Water Cycle

  2. Continuous movement of water from the atmosphere to the earth’s surface and back to the atmosphere again. Water Cycle(aka Hydrologic Cycle)

  3. Evapotranspiration: the process of evaporation (liquid water changing into water vapor) and transpiration (plants giving off water vapor into the atmosphere). 3 main processes involved in the water cycle:

  4. Condensation: water vapor (gas) changes into liquid water. Precipitation: water falls from clouds to the ground.

  5. The underground water that fills almost all the pores in rock and sediment. Makes up 90% of the earth’s unfrozen freshwater supply. Groundwater

  6. Aquifer: a body of rock in which large amounts of water can flow and be stored. Aquitard: a body of rock in which water cannot flow or be stored.

  7. Porosity: percentage of open spaces in rock. Determined by : Sorting: well-sorted- equal sized = more porous Poorly sorted-unequal sized = less porous Rock properties that affect groundwater

  8. Permeability: how easily water flows through open spaces. For a rock to be permeable, open spaces must be connected. Think about the school… All the doors open = Permeable All the doors closed = Impermeable

  9. Zone of Saturation: the layer of ground where all the pores are filled with water. The upper surface of the zone of saturation is called thewater table. Zone of Aeration: the area between the water table and the earth’s surface. Capillary fringe: the area just above the water table where water is drawn up into this area by “capillary action” Zones of Groundwater

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