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Evidence Of Erosion

Test Description: Characteristics of different erosional environments including glaciers, rivers, oceans and gravity.

Instructions: Answer all questions to get your test result.

1) The major source of sediments found on the deep ocean bottom is

Aicebergs that have broken off of continental glaciers Berosion of continental rocks Csubmarine volcanic eruptions Dsubmarine landslides from the mid-ocean ridges

2) On the Earth's surface, transported materials are more common than residual materials. This condition is mainly the result of

Asubduction Bfolding Cerosion Drecrystallization

3) The best evidence that erosion has taken place would be provided by

Adeep residual soil observed on a hillside Bfaulted rock layers observed on a plateau Ctilted rock layers observed on a mountain Dsediment observed at the bottom of a cliff

4) Which rock material was most likely transported to its present location by a glacier?

Arounded sand grains found in a river delta Bresidual soil found on a flat plain Cunsorted loose gravel found in hills Drounded grains found in a sand dune

5) What change will a pebble usually undergo when it is transported a great distance by streams?

AIt will become jagged and its mass will decrease. BIt will become rounded and its volume will decrease. CIt will become rounded and its mass will increase. DIt will become jagged and its volume will increase.

6) A sediment particle transported by a stream over a long period of time will most likely show

Aa decrease in density and size Ban increase in weight and hardness Can increase in volume and number of cleavage planes Da decrease in mass and number of angular edges

7) Which erosional force acts alone to produce avalanches and landslides?

Awinds Bgravity Csea waves Drunning water

8) For which movement of earth materials is gravity not the main force?

Aboulders carried by a glacier Bmoisture evaporating from an ocean Csediments flowing in a river Dsnow tumbling in an avalanche

9) The bedrock at a certain location is deeply scratched, and in some places is covered by a layer of unsorted sediment. Which erosional agent was probably responsible for these features?

Awind Brunning water Cocean waves Dglaciers

10) Large igneous boulders have been found on surface sedimentary bedrock. Which statement best explains the presence of these boulders?

AThe area was once part of a large mountain range. BSedimentary bedrock is composed of igneous boulders. CBoulders were transported to the area by ice. DThe area has had recent volcanic activity.

*select an answer for all questions

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