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8th science 4
ch. 4
Question | Answer |
---|---|
a huge bowl shaped depression dug out by a valley glacier is a | cirque |
what is a natural ridge formed along the edge of a river's channel | levee |
Which type of weathering involves the breaking or peeling away of rock into layers | exfoliation |
a pillarlike structure of rock formed when the middle of a sea arch collapses is a | sea stack |
the feature formed by streams merging and flowing toward the sea as a large river is a | river system |
what is produced when a sea cave is eroded continually | sea arch |
large, deep grooves and scratches in rock, produced by glaciers, are | striae |
the piles of debris left behind when a glacier melts are | moraines |
a low hill formed when a glacier overruns a moraine is a | drumlin |
deposits of clay and silt left by a sandstorm are | loess |
What type of weathering occurs when rainwater soaks into cracks in a rock and freezes, splitting the rock | ice wedging |
when a glacier-carved valley fills with seawater a ?? forms | fjord |
which natural acid, found in rainwater and ground water, promotes chemical weathering of rocks | carbonic acid |
the most important effect of wind erosion is | deflation |
regions of the earth's surface where limestone is exposed and abundant are called ?? regions | karst |
ice sheets smaller than continental glaciers are | ice caps |
a long pile of rocks deposited parallel to the shore to prevent erosion is a | breakwater |
the sharp steeple-shaped point of a mountain with three or more cirques is a | horn |
a large, funnel-shaped depression in the ground caused by cavern collapse is | sinkhole |
narrow, sandy islands that lie off the coast of the mainland are called | barrier islands |
the eroding action of windblown sand is called | abrasion |
suspension, saltation, and creep in which wind transports sediments are ? processes | aeolian |
the natural processes that break down rocks are collectively called | weathering |
a spirelike mass of dripstone on the floor of a cave is called a | stalagmite |
the method of erosion prevention that modifies a smooth slope into a series of level, stairlike steps is | terracing |
the carrying away of rock fragments, such as by wind or running water, is called | erosion |
the type of rock most commonly associated with caverns is | limestone |
particles too heavy to be lifted by the wind are rolled in short bursts through a process called | creep |
the source of a river | headwaters |
the sediments carried by a stream | load |
one of numerous streams that feed into a river at various points | tributary |
land that borders a river and is covered by river water in flood time | floodplain |
a winding, looping curve in a river on flat ground | meander |
lake formed when a sharp curve in a river is cut off from the rest of the river | oxbow lake |
fan-shaped deposit of sediments at the mouth of a river | delta |
region of land drained by a stream or river system | drainage basin |
a large stream that carries water from the mountains to the sea | river |
fan-shaped deposit of sediments at the mouth of a dry stream bed in the desert | alluvial fan |
what are two general types of weathering | chemical and physical |
what are the two major types of glaciers | continental and valley (alpine) |
Name the deep cracks that develop on the surface of a glacier | crevasses |
what are limestone formations that have become filled with various passageways and large caves called | caverns |
what is the main agent of chemical weathering | water |
what is a vertical face of rock called that forms when the sea erodes land | sea cliff |