Exercises

Question 21.1

How are valley glaciers distinguished from continental glaciers?

Question 21.2

How is snow transformed into glacial ice?

Question 21.3

How does glacial growth or shrinkage result from the balance between ablation and accumulation?

Question 21.4

What are the mechanisms of glacial flow?

Question 21.5

How do glaciers erode bedrock?

Question 21.6

What information do striations provide about glaciation?

Question 21.7

Describe three kinds of glacial sediment.

Question 21.8

Describe three landforms made by glaciers.

Question 21.9

Will the melting of ice shelves due to global warming increase sea level? Explain your answer.

Question 21.10

What type of sedimentary deposit marks the farthest advance of a glacier?

Question 21.11

Why are kettles described as water-laid sedimentary deposits, rather than ice-laid deposits?

Question 21.12

Why does sea level drop during ice ages?