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What is the predominant agent oferosion in deserts?

Ques. #1

Wind

Ans.

A river dissolves salt. Is this achemical or a physical change ANDexplain why.

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Ques. #2

Ans.

Physical. The salt has not been chemicallychanged. When the water evaporates thesalt remains.

What formed thisvalley AND explainhow you know?

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Ques. #3

Ans.

Formed by glaciers – It’s U-shaped

What name is givento the area indicatedby the arrow?

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Ques. #4

Ans.

A (river) DELTA

The tear-dropshaped featurein the photo iscomposed ofwhat kind ofsediment?

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Ques. #5

Ans.

UNSORTED glacial till

What kind of particles might befound in suspension in zone D?

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Ques. #6

ColloidsAns.

Explain the pattern ofdeposition (in water)shown in the diagram.

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Ques. #7

Ans.

The smallest beads were the most dense andthe largest were the least dense.

Indicate three ways in which rocksare changed by long periods ofstream abrasion.

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Ques. #8

Ans.

They get rounder and smoother and smaller.

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Ques. #9

Ans.

Particle D

When dropped into water, whichparticle wouldrequire the least time to settle?

During which season of the year would a stream in upstate NY becarrying the greatest total amount of sediment AND explain WHY?

Ques. #10

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Spring. Because melting snow increases stream volume which increases stream velocity. The faster a stream is moving the more material it can carry.

At what point in the stream (give letter A - D and depth 0.1 to 0.9) is deposition most likely to occur?

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Ques. #11

Ans.

Location A at a depth of 0.5m

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Ques. #12

Ans.

These are MORAINES

What term refers tothe dark lines in themiddle and along thesides of this glacier ?

Describe how andwhere this pattern ofdeposition may haveoccurred?

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Ques. #13

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Where: In a lake. How: Deposition from streams carryingsediment into the lake repeating in an annual pattern.

What is the force driving all erosion?

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Ques. #14

Ans.

Gravity

What would be thepredominant agent of erosion for a climate that had a temperature of 25 degrees C and 30mm of annualprecipitation.

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Ques. #15

Ans.

In an arid climate wind is the most important agent.

Which agent oferosion isresponsible fordepositing thissoil?

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Ques. #16

Ans.

Glaciers - the particles are unsorted

When a piece of limestone is placed in acid, bubbles of carbon dioxide are produced? This is an example of whatprocess?

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Ques. #17

Ans.

Chemical weathering

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Ques. #18

Ans.

It is very old and the slope is nearly flat.

What do you know about the age and the slope of this river.

What agent of erosionhas affected this areaand what evidence doyou see that supportsyour conclusion?

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Ques. #19

Ans.

Glaciers - parallel grooves in the rock

A soil composed of silicate particlesand organic material is found on topof limestone (carbonate) bedrock.What kind of soil is this?

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Ques. #20

Ans.

A transported soil because its silicate compositionis unrelated to the carbonate bedrock beneath it.

What kinds of particles will be carried by a stream moving at5 cm/sec?

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Ques. #21

Ans.

Sand AND everything smaller

Name 3 characteristics of particlesthat can affect the rate at whichthey settle in still water.

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Ques. #22

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Size, shape, density

Which agent oferosion is responsible for eroding the valleyshown in the diagram?

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Ques. #23

Ans.

V-shaped valley cut by running water

What kind of energy is constantlydecreasing during the process oferosion?

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Ques. #24

Ans.

Potential energy

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Ques. #25

Ans.

1) Increase the slope2) Increase the amount of water in the trough3) Narrow the outlet

Name 3 differentways this equip-ment could bemodified in orderto increase therate of waterdischarge.

Name four clues that would lead you to believe an area had been subject to glacial erosion.

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Ques. #26

Ans.

1) Parallel grooves in rocks2) Narrow, deep lakes3) U-shaped valleys4) Unsorted sediments5) Scratched & polished rock6) Erratics

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Ques. #27

Ans.

Location D. Steepest slope means fastest rate of flow.

At which location can the stream carry the largest particles?

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Ques. #28

Ans.

Location A (The higher the elevation, the greater the Pe)

At which locationwould a particlein this streamhave the greatestpotential energy.

What term refers to rocks bouncingalong the bottom of a stream?

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Ques. #29

Ans.

Saltation

What is another term for physical weathering?

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Ques. #30

Ans.

Mechanical weathering

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Erratics and kettle lakes aresigns of glacier (glacial) erosion