Deck 43: Glacial Erosion and Deposition

Question 1

Glaciers are large bodies of ice which are either stationary or in motion.

Answer 1

False

Question 2

The _____ consists of all forms of frozen water that exists above, below, and on the surface of the Earth.

A) hydrosphere
B) cryosphere
C) lithosphere
D) biosphere

Answer 2

B

Question 3

Alpine glaciers that are small and confined to hollows below mountain peaks are termed:

A) valley
B) continental
C) mountain
D) cirque

Answer 3

D

Question 4

After glaciers recede, they enter a warm period that can last tens of thousands of years until Earth enters a new cooling episode, which is called the _____ period.

A) deglaciation
B) glacial
C) interglacial
D) Ice Age

Question 5

An extended period of time when Earth's atmospheric temperatures decrease causing the expansion of glacial ice in high latitudes and growth of alpine glaciers in lower latitudes is termed:

A) glaciation
B) glacial surge
C) interglacial
D) Ice Age

Question 6

The present interglacial period is unprecedented because:

A) ice sheets and glaciers are both advancing and receding at the same time
B) glacial and continental ice are melting at a slower rate than previous ice ages
C) humans have become agents of environmental change
D) both a & c

Question 7

Valleys are to alpine glaciers as _____ are to ice sheets.

A) continental
B) mountains
C) streams
D) firn

Question 8

Sustained rapid movement of glaciers as much as one meter per hour and as long as a month or more is called a:

A) glacial surge
B) deglaciation
C) glacial creep
D) glacial sliding

Question 9

As glaciers carry rocks and rock fragments downslope, _____ form as underlying rock scratch surface bedrock.

A) abrasions
B) striations
C) glacial sliding
D) ablations

Question 10

All are forms of ablation EXCEPT:

A) melting
B) evaporating
C) calving
D) precipitation

Question 11

Asymmetrical mounds caused by glacial ice plucking are termed:

A) mountain glacier
B) Roche moutonnee
C) firn
D) basal ice

Question 12

Although much of today's glaciers are receding, evidence of the extent may be seen by the following:

A) u-shaped valleys, plucked bedrock
B) well-sorted deposits
C) striations on bedrock and unsorted till
D) both (a) and (c)

Question 13

The best glacial evidence that has helped geologists determine locations of ancient highlands that no longer exist is to look at _____, which may indicate the direction of glacial flow from high areas to low lands.

A) striations
B) Roche moutonnee
C) crevasses
D) plucked rocks

Question 14

Glacial surges are typically associated with all of the following EXCEPT:

A) deglaciation
B) alpine glaciers
C) continental glaciers
D) mountain glaciers

Question 15

Glaciers move in two ways. _____ is when the entire glacier moves downslope as one whole piece, and _____ is the movement that occurs within a glacier.

A) glacial creep; glacial sliding
B) glacial sliding; glacial creep
C) glacial sliding; glacial surge
D) glacial surge; glacial creep