Exam 4 quiz questions.docx

Quiz 17 attempt 1:  Question 1 2 out of 2 points A glacier confined in a bowl-shaped recess is known as a(n) _____ Selected Answer: cirque glacier. Correct Answer: cirque glacier.  Question 2 2 out of 2 points Approximately, what percentage of the Earth's freshwater is frozen? Selected Answer: 75 % Correct Answer: 75 %  Question 3 2 out of 2 points Worldwide, alpine glaciers are presently increasing in size and number. Selected Answer: Fals e Correct Answer: Fals e  Question 4 2 out of 2 points A snowline refers to ________ Selected Answer: the lowest line (latitude or elevation) where winter snow accumulation persists throughout the summer. Correct Answer: the lowest line (latitude or elevation) where winter snow accumulation persists throughout the summer.  Question 5 2 out of 2 points

A paternoster lake is a singular lake filling a small cirque basin behind risers of rock material. Selected Answer: Fals e Correct Answer: Fals e  Question 6 2 out of 2 points Which of the following has not been sited as a possible cause of ice sheet darkening? Selected Answer: sunspot activity Correct Answer: sunspot activity  Question 7 2 out of 2 points The area of sediment deposit by by glaciofluvial action beyond the glacial terminus is known as the _________ Selected Answer: outwash plain. Correct Answer: outwash plain.  Question 8 0 out of 2 points The albedo of the Greenland Ice Sheet has decreased over the past decade due to ice sheet darkening. Selected Answer: Fals e Correct Answer: True  Question 9 2 out of 2 points Approximately, 81% of Greenland and 90% of Antarctica are covered with ice sheets. Selected Answer: Tru e

Correct Answer: Tru e  Question 10 2 out of 2 points The Great Lakes of the United States resulted from repeated glacial advances and retreats which enlarged and deepened stream valleys to form the basins of the future lakes. Selected Answer: Tru e Correct Answer: Tru e Quiz 17 attempt 2:  Question 1 2 out of 2 points Combined, alpine glaciers and ice sheets cover about 10% of the Earth's land surface. Selected Answer: Tru e Correct Answer: Tru e  Question 2 2 out of 2 points Thawing of permafrost could create a positive feedback loop as vast amounts of carbon are released into the atmosphere, further amplifying warming. Selected Answer: Tru e Correct Answer: Tru e  Question 3 2 out of 2 points Drumlins and kettles are examples of alpine glacial landforms. Selected Answer: Fals e Correct Answer: Fals e  Question 4 2 out of 2 points During the Pleistocene, there was as many as 18 glacial advances and retreats.

Selected Answer: Tru e Correct Answer: Tru e  Question 5 0 out of 2 points Glacial erosion and deposition produce landforms similar to fluvial processes and are, therefore, difficult to ascertain their origins. Selected Answer: True Correct Answer: Fals e  Question 6 2 out of 2 points The accumulation zone of a glacier ends at the ________, which marks the elevation above which the winter snow and ice remained intact throughout the summer. Selected Answer: firn line Correct Answer: firn line  Question 7 2 out of 2 points In terms of areal extent, which of the following sequences is ordered from largest to smallest extent covered? Selected Answer: ice sheet, ice cap, ice field, alpine glacier Correct Answer: ice sheet, ice cap, ice field, alpine glacier  Question 8 2 out of 2 points When several cirque glaciers gauge an individual mountain summit from all sides, a pyramidal peak known as a ________ results. Selected Answer: hor

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