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37 Cards in this Set
- Front
- Back
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erosion
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the removal of surface material
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water cycle
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the continuous movement of water from water sources
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condensation
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water vapor cools and changes to liquid water droplets that form in clouds
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precipitation
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rain, snow, sleet, or hail that falls from clouds onto the earth's surface
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runoff
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water that flows across land and collects in rivers, streams, and eventually the ocean
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evaporation
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occurs when liquid water from the earth's surface and from living organisms changes into water vapor
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percolation
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the downward movement of water through pores and other spaces in soil due to gravity
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infiltration
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the movement of water into the ground due to the pull of gravity
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tributaries
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smaller streams or rivers that flow into larger ones
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drainage basin
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the land drained by a river system
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divide
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an area of higher ground than the basins it separates
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channel
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the path that a stream follows
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gradient
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the measure of the change in elevation over a certain distance
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discharge
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the amout of water a stream or river carries in a given amount of time
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load
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the materials carried in a stream's water
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bed load
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large materials such as pebbles and boulders
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suspended load
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make the river look muddy becaus of small rocks and soil in suspension
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dissolved load
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consists of dissolved materials
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flood plains
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valleys
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meanders
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turns in a river
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deposition
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the process where material is dropped or settles
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alluvium
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rock and soil deposited by streams
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placer deposit
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places in a river where the current slows down and heavy minerals are sometimes deposited
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delta
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a fan shaped deposit where the river reaches a large body of water
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alluvial fan
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fan shaped deposits that form on dry land
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flood plain
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a place where the volume grows and sometimes causes the river to overflow
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ground water
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water below the earths surface
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water table
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where the zone of aeration and the zone of saturation meet
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aquifer
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a rock layer that stores and allows the flow of ground water is called an aquifer
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porosity
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the amount of open space between individual rock particles
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permeability
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a rocks ability to let water pass through it
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recharge zone
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where water enters and aquifer
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sinkhole
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a circular depression
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point source pollution
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pollution that comes from one point
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nonpoint source pollution
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pollution that comes from many different places
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sewage treatment plants
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factories that clean the waste materials out of water that comes from the sewer or drains
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septic tank
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a large underguround tank that collects and cleans waste water from a household
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