Question 1

Compare the rate of movement in a surging glacier with other physical geography processes.Identify some of the possible causes of surging and the impacts of surging upon the environment.

Accepted Answer

The answer of Compare the rate of movement in a...

Question 2

A rock knob is shaped by moving ice,such that the lee side is eroded by glacial abrasion to create a smooth surface.

Accepted Answer

A rock knob, also known as a roche moutonnée, is shaped by moving ice such that the upstream side (stoss side) is smoothed by glacial abrasion, while the downstream side (lee side) is often plucked and left rough as the glacier moves over it.

Question 3

Hanging valleys are formed by ice sheets when they erode high mountain peaks.

Accepted Answer

Hanging valleys are formed by tributary glaciers that erode their valleys less deeply than the main glaciers they flow into, not by the erosion of high mountain peaks by ice sheets.

Question 4

Streams of meltwater from the terminus of a glacier build glacial deltas that eventually become flat-topped land forms known as kames.

Accepted Answer

The answer of Streams of meltwater from the terminus of...

Question 5

There has been only one significant glacial episode in the last 200,000 years.

Accepted Answer

There have been several significant glacial episodes in the last 200,000 years, including the Wisconsin glaciation in North America and the Weichselian glaciation in Europe.

Question 6

Stratified drift consists of layers of sorted and stratified clays and angular pebbles and large boulders.

Accepted Answer

Stratified drift consists of layers of sorted and stratified sediments, typically sand and gravel, deposited by glacial meltwater, not clays, angular pebbles, or large boulders.

Question 7

Describe the spread of ice sheets across North America during the Wisconsinan glaciation

Accepted Answer

The answer of Describe the spread of ice sheets across...

Question 8

Using an annotated diagram,describe the erosional land forms produced by alpine glaciers.Where relevant identify examples of such features in your local region,or provide well-known examples from around the world.

Accepted Answer

The answer of Using an annotated diagram,describe the erosional land...

Question 9

Describe and explain the possible causes of the Late Cenozoic Ice Age.

Accepted Answer

The answer of Describe and explain the possible causes of...

Question 10

Describe the formation of a glacial trough and the formation of associated hanging valleys.

Accepted Answer

The answer of Describe the formation of a glacial trough...

Question 11

Lobes of ice flowing from the Laurentide ice sheet spread around an area in Wisconsin known as the Driftless Area.

Accepted Answer

The Driftless Area is a region in southwestern Wisconsin that was not covered by the Laurentide ice sheet during the last ice age. As a result, the area has a unique landscape that is characterized by steep bluffs, deep valleys, and rolling hills.

Question 12

Compare and contrast the characteristics and formation of drumlins and rock knob.

Accepted Answer

The answer of Compare and contrast the characteristics and formation...

Question 13

Using an annotated diagram,describe the general features of a valley glacier.Identify and define the processes that dominate each zone.

Accepted Answer

The answer of Using an annotated diagram,describe the general features...

Question 14

Ice sheets during the last glacial maximum in North America,extended as far south as Florida and Texas.

Accepted Answer

During the last glacial maximum, ice sheets in North America extended into the northern United States but did not reach as far south as Florida or Texas. They covered much of Canada and parts of the northern United States, including areas like New York and parts of the Midwest, but the southernmost extent was roughly around the latitude of central Illinois.

Question 15

Compare and contrast the movement and characteristics of alpine glaciers and continental ice sheets.

Accepted Answer

The answer of Compare and contrast the movement and characteristics...

Question 16

Compare and contrast the different forms of glacial drift,till and moraines.Draw diagrams to indicate particle size and sorting.

Accepted Answer

The answer of Compare and contrast the different forms of...

Question 17

The astronomical hypothesis proposed by Milankovitch suggests that cycles in axial rotation and solar revolution has a period of around 20,000 years.

Accepted Answer

The Milankovitch cycles include variations in Earth's orbit and axial tilt, with precession having a cycle of about 26,000 years, not 20,000.

Question 18

Using an annotated diagram,describe the depositional land forms produced by continental glaciers.Where relevant identify examples of such features in your local region,or provide well-known examples from around the world.

Accepted Answer

The answer of Using an annotated diagram,describe the depositional land...

Question 19

A cirque is a bowl-shaped depression in which snow may accumulate.

Accepted Answer

A cirque is a bowl-shaped depression in a mountain side that is created by glacial erosion. It is commonly filled with snow and can accumulate snow and ice to form a glacier.

Question 20

When the floor of a trough open to the sea lies below sea level,the sea water enters as the ice front recedes,forming a fiord.

Accepted Answer

This statement is true. As the floor of the trough beneath the ice front is pushed down by the weight of the ice, it can sink below sea level. When the ice front retreats, sea water fills the trough, forming a fiord.

Quiz 17: Glacier Landforms and the Ice Age