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30 Cards in this Set
- Front
- Back
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abraison
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wearing away of rock by a grinding action
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aquifer
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the permeable layer, usually sandstone or gravel
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base level
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the level of the body of water into which a stream flows
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bed load
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sand, pebbles, and boulders that are moved along the bed of a stream and are too heavy to be carried in suspension
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calving
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glaciers as they extend into the sea, great blocks of ice break off to become icebergs
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carrying power
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the total amount of sediment in a stream together with the size of the particles being moved by the stream
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continental glacier
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the large ice sheets of Greenland and Antartica
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deficit
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a condition in which soil water storage is gone and there is a need for moisture from rainfall
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evaoptranspiratoin
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the loss of moisture as water vapor from the ground and from plants leaves
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firn
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in the hugh snowfields freshly fall snow becomes compressed and recrystalizes into a granular ice mat
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porosity
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percentage of material that is pore (open) space
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recharge
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the filling of soil water supply at times when plants need little moisture so there is some to fill underground water supply
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hydrosphere
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all the water of the Earth including surface and water underground
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ice caps
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small ice sheets
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ice front
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the location where a glacier melts as fast as it moves forward
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ice sheet
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roughly circular or oval in shape
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impermeable
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describes a rock material through which water does not pass easily
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outwash
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a broad stratified gently sloping deposit formed beyond the terminal moraine by streams
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permeable
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the airspaces in rocks (pores) means that water can pass through it
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rock flour
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a mixture of fine sand and silt formed by the crushing of rock under a glacier
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snow line
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the lowest level that permanent snow reaches in summer
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straiations
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scratches on rocks and bedrock due to glacier movement
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surplus
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the condtion of having rainfall greater than the need for moisture when the soil is already saturated (holding all it can hold)
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till
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unsorted and unstratified rock materials carried inthe bottom of a glacier
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usage
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the condtion where plants draw water from the soila t times when the need for moisture is greater than the rainfall
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valley glacier
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a large slowmoving, wedge-shaped stream of ice
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water budget
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describes the income and outgo of water in a region
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water cycle
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the hydrologic cycle, a never-ending movement, of water from one part of the hydroshpere to another
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water table
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the surface below which the ground is saturated with water
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watershed
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the entire area drained by a stream and its tributaries
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