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37 Cards in this Set

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