Lab 07: glacial landscapes | Geography homework help


INTRODUCTION

This module examines bald processes and verseaments. Topics involvecontinental and alpine glaciation, ablation and hoard, cirques, drumlins, kettles, kames and moraine. Period these themes may counterbisect to be ill-assorted, you achieve subordinatestand how they are inherently kindred.The modules initiate delay five hole themes, or vignettes, which are base in the accompanying Google Earth finish. These vignettes bring-in basic concepts of the bald processes and landforms. Some of the vignettes feel airliness, videos, or soon articles that achieve afford another perspective or visual sense for the theme at workman.  After lection the vignette and associated links, counterbisect the forthcoming questions. Please melody that some links effectiveness prime a period to download naturalized on your Internet despatch.

 

Expandthe INTRODUCTION folder and then obstruct Theme 1: Introduction.

ReadTopic 1: Introduction.

Question 1: What are some uses of freshinsinuate from glaciers?

A.   Agriculture

B.   Industry

C.   Tourism

D.   All of the above

Read Topic 2: Types of Glaciers.

Question 2: What is the semi-round verseament at the far left of the effigy?

A.   Drumlin

B.   Lateral moraine

C.   Terminal moraine

D.   Medial moraine

 Read Topic 3: History delayin Bald Ice.

Question 3: Amid the snow, do calmer temperatures termination in better or inferior concentrations of unthoughtful oxygen (16O)?

A.   Higher, accordingly there is further distillation to upheave 18O out of the ocean

B.   Lower, accordingly there is further distillation to upheave 18O out of the ocean

C.   Higher, accordingly there is hither distillation to upheave 18O out of the ocean

D.   Lower, accordingly there is hither distillation to upheave 18O out of the ocean

 Read Topic 4: The Global Retreat and Advance of Glaciers.

Question 4: What happened to the Peterman Glacier on Aug 5, 2010?

A.   Satellite effigyry regard the glacier was in-effect advancing

B.   A big bulk of the glacier broke off the designing glacier

C.   Icebergs were mottled calving

D.   An ice dam fashiond by icebergs broke unleashing 3 darling cfs of insinuate

 Read Topic 5: Human Reliance on Glaciers for Water.

Question 5: What was the peak execute on August 14, 2002?

A.   97 cfs

B.   3.9 darling cfs

C.   1.9 darling cfs

D.   145,000 cfs

Collapse and unobstruct INTRODUCTION.

GLOBAL PERSPECTIVE

 Expand GLOBAL PERSPECTIVE and then double-click and prime Major Universe Glaciers.

This map pomps the subsidence of important glaciers (in blue-colored) throughout the universe. At offer, glaciers balancespread closely 10 to 11 percent of the demeanor of the Earth. Frequent cities pause on glaciers as their commencement of insinuate.

Double‑click Question 6. When you attain at your end, discbalance the knowledge to apaim in the blanks beneath. Repeat this for Questions 7 and 8:

Question 6:        

City:

A.   Lima

B.   Buenos Aires

C.   Santiago

D.   Bogotá

Population:

A.   7.2 darling

B.   2.7 darling

C.   3.6 darling

D.   4.5 darling

Glacier(s) located which verse from city:

A.   North

B.   East

C.   West

D.   South

 

Question 7:

City:

A. Bhutan

B. Lhasa

C. Katmandu

D. Tibet

Population:

A.2.7 darling

B. 4.3 darling

C. 1.9 darling

D. 4.5 darling

Glacier(s)located which verse from city:

A.   North

B.   West

C.   East

D.   South

Question 8:

Glacier: Atetsch

Latitude and Longitude (degrees singly):

A.   Latitude 46 °N, Longitude 8° E

B.   Latitude 46 °N, Longitude 8° W

C.   Latitude 46 °S, Longitude 8° E

D.   Latitude 46 °S, Longitude 8° W

 

Collapse and unobstruct GLOBAL PERSPECTIVE
ALPINE GLACIATION

Figure 1.Glacier bulk budget.(Arbogast 2nd Ed.).

Alpine glaciers are base in frequent of the universe’s important mountain ranges. These glaciers are dynamic and glide downhill subordinate the intensity of lugubriousness. In frequent places, alpine glaciers are returning as the snowpack decreases in evening months and medium temperatures extension during the germinate and summer months.

Expand the ALPINE GLACIATION folder.Double-click and prime Mass Balance.

This is the Klinaklini glacier in British Columbia, Canada. Adesire an alpine glacier there are two important zones, hoard and ablation. The zone of hoard(Figure 1) is located at better tallnesss where temperatures redesigning calm sufficient such that snowfall exceeds running balance the conduct of a year. Conversely, the zone of ablation is located at inferior tallnesss where running exceeds snowfall. The red verse in the average represents the equilibrium verse, where snowfall and running are correspondent balance the conduct of a year. Farther down in the zone of ablation, and dropping of ice by meltinsinuate is plum.

Question 9: Where do we discbalance the designing fissures in the glacier notorious as crevasses– in the zone of hoard or the zone of ablation?

A.   Zone of hoard

B.   Both zone of hoard and ablation

C.   Zone of ablation

D.   Neither zone of hoard now ablation.

 KeepMass Balance selected, and then double‑click Direction of Flow.

Question 10:Explain the verse of glide of bald ice, from the zone of hoard to the dropping of ice by meltwater.

A.   The glacier glides downward from the zone of hoard subordinate the govern of lugubriousness.

B.   The glacier glides uphill as it melts

C.   The glacier glides in a southern verse towards the equator

D.   Direction pauses on the sum of snowfall.

 

Erosional Features

Figure 2.Glaciation (17.16 Arbogast 2nd Ed.)

 

A cirque (or corrie) is a bowl‑shaped erosional verseament fashiond by close bald ice glide that that plucks esthetic from a smoothness on a spring and promotes the myth of a debasement. Cirque glaciers are typically the source of U castd debasement glaciers. After glaciation, frequent cirques comprehend tarn lakes (Figure 2) period in the bald debasements, chains of paternoster lakes are formed, commsingly united by a only course rule.

 

Expand Erosional Features and then double‑click and prime Mt. Rainier.

Figure 3. Geographic Features verse item

 

Mount Rainier, delay its 25 glaciers balancespreading 90 clear km (35 clear mile), has further glaciers than any other peak in the continental US.

 

Mt. Rainier is located south of Seattle, Washington. Google has a exercise that enables you to see further knowledge about the mountain such as the tallness and the tallness profile, and to fly on a outing. Open the Layers pane, spread Borders and Labels, spread Labels and then obstruct Geographic Features (Figure 3).        

 

 Double‑click Mount Rainier Tour.

 

 Double‑click and prime A and B.

Question 11: The ridgeverse is what archearcheemblem of bald verseament?

A.           Cirque

B.           Tarn

C.           Horn

D.           Arete

 Double‑clickForbidden Peak Tourto get a closer seem.

Question 12:What bald verseament (there are almost 20 of them) is base on twain sides of the ridgeverse between A and B?

A.           Cirque

B.           Tarn

C.           Horn

D.           Arete

Question 13: Seem at the lake beneath this ridgeline. This lake is what archearcheemblem of bald verseament?

A.           Cirque

B.           Tarn

C.           Horn

D.           Arete

 Double‑click and prime .

Question 14:What archearcheemblem of bald verseament is this lake?

A.           Cirque

B.           Tarn

C.           Horn

D.           Arete

 Double-click prime the Dfolder.

When 3 or further cirques tail into each other they fashion a detail landform verseament.However, this verseament is subordinately arduous to see in the 2D perspective.

 Double‑click. Double‑click and primeMountain Tour.

Question 15: What is the call of this bald verseament, to which the mountain is calld (Hint: You can individualize the call of the important height by enabling Geographic Features)?

A. Cirque

B. Tarn

C. Horn

D. Arete

 

Close the euphuism regulate panel:

 Double-click and primeValley. Click animation in the window.

This debasement was originally fashiond by a liberal stream rule and in-effect qualified by a glacier that has departed retreated.

Question 16:What archearcheemblem of debasement is base at D?

A. Liberal stream debasement

B. Bald debasement

C. Hanging debasement

D. V – castd debasement

 

Collapse and unobstruct Erosional Features

Transportation and Depositional Features

 Double-click Transportation and Depositional Features.

This is the glacier d'Otemma in Switzerland. Amid this alpine glacier, divers attractional verseaments are plum. Most renowned are the diversified moraines base adesire (lateral), unmoulded or between (medial) and at the end (terminal) of the glacier. Morainesconsist of unsorted watch (diamicton or settlement) that is deposited delay glaciers; the subsidence of the moraine individualizes the archetype. Three of the most well-notorious moraines are:

Double‑click and prime learning F, G, and H barely to establish the forthcoming verseaments:

Question 17:Feature :

A.   Medial moraine

B.   Terminal moraine

C.   Lateral moraine

D.   Recessional moraine

Question 18:Feature :

A.   Medial moraine

B.   Terminal moraine

C.   Lateral moraine

D.   Recessional moraine

Question 19:Feature

A.   Medial moraine

B.   Terminal moraine

C.   Lateral moraine

D.   Recessional moraine

Collapse and unobstruct ALPINE GLACIATION.

Continental Glaciation

During bald periods in the departed, big portions of North America were balancespread by continental glaciers. Today, these glaciers are base predominantly in Greenland and the Antarctica. But remnants of continental glacier motive can be base despite plenteous of Canada,the northern continental US, northern Europe and Russia.

Expand and clickCONTINENTAL GLACIATION. Click continental glaciation video in the window. This airlines depicts marginal landforms of continental glaciers.

As you can see, it is the attractional verseaments of continental glaciations that redesigning on the anticipation.These verseaments involve those that formed subordinate or as a termination of bald lobes period other verseaments are a termination of bald meltwater.

 ExpandDepositional Features.

Drumlins are fashiond by continental glaciers that recast earlier deposited glacier esthetic as they progress balance it (Figure 4).They watch to be elongated and orient in the verse of ice progressment. The harden end of a drumlin faces the verse from which the glacier was tender when it fashiond the drumlin.

 

Figure 4.Topographic truthfulness of a drumlin and its verse of bald ice glide.

 Double-click Drumlin.

This is a anticipation delay divers drumlins. From the air it is arduous to see them; notwithstanding, it becomes further apparent when conouting verses are ascititious to pomp tallness changes.

 Set the tallness exaggeration to 3.

Select Drumlin Contour.

Look for a sequence of conouting verses forming an elongated cast common to Figure 4. This verseament is a drumlin.

Double-click and prime Drumlin Angular View to see an angular conception of the verseament.

Question 20: According to the casts of the drumlins, what (compass) verse do you consider the ice was tender when it formed the drumlins?

A. NE

B. NW

C. SE

D. SW

 

Double-click and prime Kettle Lake.

This big round substance of insinuate is a kettle lake formed by a fill of ice a returning glacier flux off. Balance duration the fill of ice is barely buried and then melts to fashion a debasement.When appointed delay insinuate, this debasement is termed a kettle lake. Use the magistrate utensil and appraise the absence despite the lake from aim H to aim I.

Question 21: How ample, in miles, is the lake (from H to I)?

A. 1.6 miles

B. 2.6 miles

C. 3.6 miles

D. 4.6 miles

 

Question 22: Assuming the lake is round, consider the area of this lake (A=πr2)in clear miles, where A is area, pi is 3.14, and r2 is the radius of the dispersion cleard.

Area is __________________mi2

A. Π(0.8)2 = 2.00  clear miles

B. Π(1.6)2 = 8.04 clear miles

C. Π(3.6)2 = 40.72 clear miles

D. Π(4.6)2 = 66.48 clear miles

 

ExpandEskers. Prime Ripley Esker.

Eskers are desire snake affect ridges fashiond by the attraction of settlement frommelt insinuate courses that glideed delayin or subordinate glaciers. Gravel pits repeatedly mine eskers for sand and gravel.

This is the Ripley Esker in Minnesota. Regard how the trees depict the esker.

 Select Belle Prairie.

You can use the forthcoming Google Earth utensils to find the esker easier to see on the topographic maps:

·         Use the Adjust Opacity utensil to see how the topographic map compares to the aerial photograph.

·         Use the Ruler utensil to scold the protraction of the esker.

Question 23: What is the border protraction of the esker in miles?

A.   1.5 miles

B.   2 miles

C.   5 miles

D.   10 miles

Question 24: What are the two dominant economic activities base encircling the esker?

A.   Farming and ranching

B.   Ranching and quarrying

C.   Tourism and farming

D.   Quarrying and farming

 

Double-click Moraine.

This anticipation in Minnesota is mottled delay a final moraine and kettle lakes. Period the lakes are comfortable to see, the moraine is not.

Double-click Moraine Perspective to conception the anticipation from a 3-D perspective.

The moraine counterparts as a sequence of hills.

SelectInspiration Peak to conception a topographic map of the anticipation.

Question 25: What is the tall aim (in feet) of the moraine in the red draft?The tall aim is located adjacent the convenient eastern bisect of the Inspiration Peak map remarkable by the red sum 1.

A.   1550

B.   1650

C.   1705

 

D.   1555