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Grade 9 Geography > Glaciers > Flashcards

Flashcards in Glaciers Deck (12):
1

How much of the earth is covered with ice

10%

2

What has the most amount of ice

Anarctica 85%

3

What kind of glaciers does Greenland and Antarctica have

Conventional glaciers

4

What were the 3 original ice centres in Canada

Keewatin
Labrador
Cordillera

5

Explain glacial movement

1.front advances-rate of snow accumulation is greater than melting rate

2.Stationary front-Snow accumulation of rate of melt are, ice in glacier moves forward. But melts off as fast as it moves forward.

3. Retesting front-rate of melt is faster than accumulation. Ice on glacier is still moving forward or out, but is melting so fast the front is losing ground.

6

What is a glacier

A slow moving mass of ice

7

What are continental glaciers

Glaciers that occur on late areas of land
-move under their own weight
-occur in regions near the earths poles
-only exists in Greenland and Anarctica

8

What are alpine glaciers

Formed in mountainous regions
-move down valleys from high elevations to low elevations due to gravity
-give upper portions of the mountain a rugged appearance

9

What is the zone of accumulation

Area of glacier where snow builds up and turns ice. Ice is spread outward from its centre at this zone

10

What is the zone of ablation

The melting of snow or ice

11

What is a striation

Groves that were gouged out in the bedrock under the ice sheet
-caused by rocks that were frozen in ice
-visible in the Canadian Shield today
-run in the same direction of the movement of the ice sheet

12

Explain the forming of glacial ice

Stage 1:Snow

Stage 2:Neve

Stage 3:Glacial ice
Takes 200 years