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science test ch 4

QuestionAnswer
Weathering breakdown of rocks due to physical or chemical changes.
Physical weathering changes the size and/or shape of rocks
Frost action when water gets into cracks and freezes. the water freezing makes more vol. so the crack gets bigger.
Abrasion rock bits in streams rub together. this wears them down.
Chemical weathering changes the mineral composition and forms new substances.
Soil mix of weathered rock, microorganisms and organic remains
Mass movement / mass wasting when rocks or sediments move downhill without being carried by water, wind or ice
Stream velocity other word for stream speed. slope and amount of flowing water controls.
moraines deposit of unsorted till pushed into place by a coming glacier
drumlins streamlined hills. steep slope in the north, not in the south
possible causes of ice ages movements of the conttenints change in the tilt of the Earth's axis changes in the earths orbit shape changes in carbon dioxide changes in the amount of dust
Erratic big rock moved by a glacier
Esker A winding ridge by a stream in a tunnel under a glacier
Kame small hill of sediments by a stream, often at the edge of a glacier
outwash sorted sediments carried from glacier by meltwater
Striations scratches on bedrock made by glacier dragging rocks
Whaleback A rock knob shaped and plucked by moving ice.
Created by: M0l
 

 



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