Quizlet

Flashcards: 4th gr. science Mod. B ch 2 Randell

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soil and rockBesides water, rivers carry large amounts of what ?
dissolveSome rocks break apart because mineral
glaciersMoraines are depostits left over by ?
oceansWhat changes shorelines.
glaciersWhat forms moraines
rivers of iceValley glaciers are ____ .
valleys and canyonsWhen streams and rivers erode the land they form ____ .
riversWhat can erode canyons
the soil and rocks settle at the bottomWhen rivers reach flat land and the water slows down what happens?
8 million yearsThe Colorado River has been carvng the Grand Canyon for about _____ .
weatheringThe breaking down and wearing away of rocks is called what ?
weatheringWater seeping into cracks and freezing is an example of ?
waterfallsWhat erodes their own cliffs?
cracks get biggerWhen water seeps into the cracks of rocks and freezes what happens to the cracks?
erosionThe movement of weathered rocks and soil by water is called?
erosionRock and soil moved by glaciers and rivers is an example of what?
riversCanyons have been formed by what?
change the shorelineOcean waves can ______ ?
erode rocksOver a period of time a waterfall can _____ .
grind rocks togetherSome beach sand is formed when ocean waves ___ .
creeps slowly forwardWhat does a typical valley glacier do ?
waterThe weathering of rocks is caused by wind and _____ .