Understanding Glacier Dynamics: Concepts and Key Terms

Score for this attempt: 90 out of 100 Submitted Feb 7 at 11:49am This attempt took 13 minutes. Question 1 4 / 4 pts As a continental glacier arrives at the coastline, parts of the glacier reach the water and fall in forming __________. rivers ice sheets icebergs floating glaciers Good job! Your correct answer demonstrates your understanding of the module concepts. Question 2 4 / 4 pts During the winter, the amount of snowfall increases on a glacier, which causes accumulation and the glacier to thicken, and because there is not much melting this creates a net gain of ice called a __________ ice budget.

neutral positive zero budget negative Good job! Your correct answer demonstrates your understanding of the module concepts. Question 3 4 / 4 pts New snow on a glacier in the first year, which is called __________ snow, is very granular in nature and gets partially melted, or undergoes sublimation or evaporation. neve zone of ablation zone of accumulation firn Good job! Your correct answer demonstrates your understanding of the module concepts.

Question 4 4 / 4 pts __________ are scientists who study glaciers and dig down and analyze the different layers and the type of snow that has accumulated over the summer and winter seasons. Geologists Ecologists Biologists Glaciologists Good job! Your correct answer demonstrates your understanding of the module concepts. Question 5 4 / 4 pts Greenland and Antarctica are both __________ ice sheets. continental oceanic

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arctic floating Good job! Your correct answer demonstrates your understanding of the module concepts. Question 6 4 / 4 pts The process of the ice falling into the ocean is called glacial __________. Good job! Your correct answer demonstrates your understanding of the module concepts. Question 7 4 / 4 pts This is the area where more snow melts and evaporates than gets replaced by new snowfall and results in an overall net loss of ice. Zone of Ablation Zone of Accumulation Firn

Neve Good job! Your correct answer demonstrates your understanding of the module concepts. Question 8 4 / 4 pts __________ are large masses of very thick ice found above the snow line. Good job! Your correct answer demonstrates your understanding of the module concepts. Question 9 4 / 4 pts About __________ of the current landmass of the Earth is made up of glaciers. 0% 10% 20% 5%

Good job! Your correct answer demonstrates your understanding of the module concepts. Question 10 4 / 4 pts The __________ line is an imaginary line at which the snow never melts. Good job! Your correct answer demonstrates your understanding of the module concepts. Question 11 10 / 10 pts Describe how glaciers form using ablation, sublimation, evaporation, and accumulation. Please use complete sentences and proper grammar. Your Answer: In order to have a place where glaciers form, the amount of ablation, which is snow lost through melting, evaporation, and sublimation, needs to be less than the amount of snowfall. Question 12 5 / 5 pts

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Please match the following. Glaciation The process of glaciers carving out the landscape. Gravity This is the main cause of glacier movement, by packing the ice and causing it to begin to move downhill. Basal Sliding This is caused by ice melting due to the increased pressure. Creep This is also known as internal deformation of the glacier's ice crystals, which causes the glacier to move slower on the bottom than on the top. Crevasses

These are very large cracks in the brittle upper portion of the glacier from the stress caused due to the top moving faster than the bottom. Good job! Your correct answer demonstrates your understanding of the module concepts. Partial Question 13 3 / 5 pts Please match the following. Cirque A round area of ice. Headwall A sharp, jagged mountain resulting from glacial erosion.

Sorry, please look back through the "Glacier Movement & Erosion" lesson. Reviewing this information will help you with answering the question. Arête A high wall of rock behind a cirque. Sorry, please look back through the "Glacier Movement & Erosion" lesson. Reviewing this information will help you with answering the question. Horn A worn wedge left at the top of a mountain where glaciers move down several sides carving the mountain sharply. Hanging Valley This is formed after the ice melts from glaciers sliding down mountains forming several u-shaped valleys, and one u-shaped valley runs into another one coming from another mountain. Question 14 4 / 4 pts

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A __________ lake forms when a block of ice breaks off the glacier and gets stuck in the dirt leaving a depression which fills up with water as the ice melts. Good job! Your correct answer demonstrates your understanding of the module concepts. Question 15 4 / 4 pts __________ are similar in look to a drumlin, but they are found with kettles because they are both formed when the glacier melts and are made up of sand and gravel till deposited as the melt water recedes and therefore are composed of outwash and layers of sand and gravel. Kames Arete Eskers Drumlins Good job! Your correct answer demonstrates your understanding of the module concepts. Question 16 4 / 4 pts

Ridges of soil and sediments that have been deposited by melting glaciers are called __________. glacial till terminal moraines moraines lateral moraines Good job! Your correct answer demonstrates your understanding of the module concepts. Question 17 4 / 4 pts __________ are created when glaciers move over old moraines and deposit sediment carried by the glacier, forming a sloping tail on the older Moraine. Good job! Your correct answer demonstrates your understanding of the module concepts. Incorrect Question 18

0 / 4 pts When a glacier begins to melt due to warmer temperatures, the resulting water flows to the valley below carrying with it sediments, sand, and gravel, scraping it away and depositing it, and that sediment deposited by the glacier is called __________. outwash removal fill out fill up Sorry, please look back through the "Glacial Deposition" lesson. Reviewing this information will help you with answering the question. Question 19 4 / 4 pts In the event that two glaciers collide, their advancing glacial till meets in the middle as a __________ moraine. Good job! Your correct answer demonstrates your understanding of the module concepts. Question 20

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4 / 4 pts __________ are large rocks that are not the same as the rock types found in the area and are deposited by the glaciers as they move or melt. Erratics Eskers Arete Drumlins Good job! Your correct answer demonstrates your understanding of the module concepts. Incorrect Question 21 0 / 4 pts Roche Moutonnée are small “mountains” that lie in the direction of glacial flow, that is, __________. cross-cut parallel

horizontal vertical Sorry, please look back through the "Glacial Deposition" lesson. Reviewing this information will help you with answering the question. Question 22 4 / 4 pts The upstream side of the Roche Moutonnée is __________, indicating that the glacier is flowing from that direction. Good job! Your correct answer demonstrates your understanding of the module concepts. Question 23 4 / 4 pts A __________ is one that is at the lowest edge of a large glacier and where the glacier ends. They can be very large glacial landforms. glacial till terminal moraine

lateral moraine moraine Good job! Your correct answer demonstrates your understanding of the module concepts. Quiz Score: 90 out of 100 Previous Next

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