Lecture: 20-21 Glacial Processes

Question 1

______ is granular snow that has survived a summer melt season

Answer 1

Firn

Question 2

True or False: As firn is compacted it gradually recrystalizes into glacial ice.

Answer 2

True

Question 3

____ are large masses of perennial snow and ice, (resting on or adjacent to a land surface) that typically shows movement in response to gravity.

Answer 3

Glaciers

Question 4

____ are A large ice mass, of area greater than 50,000 km2, these ice masses cover the underlying topography(e.g. Antarctic Ice Sheet)

Answer 4

Ice sheets

Question 5

____ are A large ice mass, sufficient to bury underlying topography but with an area less than 50,000 km2.

Answer 5

Ice cap

Question 6

____ are a A level area of ice of variable size, in cross-section it lacks the prominent dome shape seen in sheets and caps

Answer 6

Ice field

Question 7

____ are A long relatively narrow ribbon of ice that is confined between valley walls, usually fedby cirque glaciers or functions as an outlet glacier for ice fields, caps or sheets

Answer 7

Valley glacier

Question 8

____ are A small body of ice, firn and snow that occupies a depression, hollow or bowl on a mountain side.

Answer 8

Cirque glaciers

Question 9

True or False: a negative mass balance will retreat while a positive mass balance will move forward

Answer 9

True

Question 10

___ is where mass balance is positive and ___ is where mass balance is negative?

Answer 10

Accumulation zone, Ablation zone