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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 |