Earth Science- Water Erosion
Artificial levees and dams are structures used to control _______.
flooding
An intermittent hot spring in which a column of water shoots up with great force at various intervals is a(n) _____.
geizer
A U-Shaped ______ results after a glacier moves through a narrow V-Shaped valley.
glacier trough
Most streams carry the largest part of their load _______
in suspension
Over time, how do sand dunes tend to migrate?
in the same direction as the wind blows
A stream's discharge ________
increases between its source and mouth
When wind creates a sand dune, the sheltered side if the dune ______.
is steeper than the windward side
Sinkholes can form when _________.
rainwater containing carbon dioxide dissolves underground
The most prominent features of a narrow V- shaped valley where the stream profile drops quickly are _____
rapids and waterfalls
Groundwater is found underground in the zone of ______.
saturation
A mass movement that involves the sudden movement of a block of material is a called a ______.
slide
A drainage basin is _______
the land that contributes water to a stream.
What is the water cycle?
the unending circulation of Earth's water supply
Springs form where _____.
the water table intersects the ground surface
When two cirques on opposite sides of a valley meet, they form a(n).
Arete
What is a bowl-shaped depression at the head of a glacial valley?
Cirque
When glaciers with embedded rocks move over bedrock valley walls, they grind out PERPENDICULAR grooves and scratches. T/F
False, Parallel
A method of transport by which strong winds cause particles to stay airborne for long distances is called SALTATION T/F
False, Suspension
A landslide in which layers of snow slide down a mountainside at speeds of up to 300 km/hr is a(n) ROCKSLIDE. T/F
False, avalanche
The best way to reduce the number of disasters related to mass movements os to RELOCATE people. T/F
False, educate
Because a heavy saturation of water greatly increases the weight of soils, the force of FRICTION is more likely to pull the material downhill. T/F
False, gravity
Where there is limited sand available and strong prevailing winds, _______.
Longitudinal dunes are formed
The ability of a stream to carry a load is determined by its _____.
capacity
The lowering of the land surface that results from the wind's removal of surface particles is known as ______.
deflation
A depositional feature that forms where a stream enters a lake or ocean is a ____
delta
Streams flowing under a melting glacier deposit long, winding ridges of layered sediments called ________.
eskers
Which type of rock usually underlies a karst landscape?
limestone
Streams that flow over floodplains often move in wide curves called _______.
meanders
A ridge consisting of mixed debris deposited by a glacier is a(n) _______.
moraine
What causes abrasion in a desert?
wind
Slumps are common after rainfall because the water ______.
Reduces friction between soil grains
After WEATHERING processes take place, mass movements occur. T/F
True
Many parts of Earth's surface are covered by thick layers of windblown silt are called LOESS. T/F
True
Permeable rock layers or sediments that freely transmit groundwater are ____.
aquifers
A(n) ____ is one in which ground water rises on its own under pressure.
artisan well
The slow, steady, downhill flow of loose weathered earth materials is called _______.
creep
A floodplain forms where a stream _____
cuts mainly side to side
Abrasion changes the desert surface by ______.
cutting and polishing exposed rock surfaces.
What is material deposited directly by a glacier?
till
The ability of a stream to erode and transport material depends largely on its _________
velocity
Rocks that are shaped by windblown sediment are known as _________.
ventifact
Desert pavement is created as a result of _____.
water erosion
The shape of star dunes is mostly due to _______.
wind direction
