Week 6.2

Question 1

Desert

Answer 1

One of the 2 types of dry climate. The driest of dry climates

Question 2

Steppe

Answer 2

One of the 2 types of dry climate, a marginals and more humid desert that separates it from bordering humid climates

Question 3

Rain shadow

Answer 3

Dry region that results in the leeward side

Question 4

Cross bed

Answer 4

I

Question 5

Wind Saltation

Answer 5

Wind blown sand that moves by skipping and bouncing across the surface

Question 6

Wind Suspended load

Answer 6

Mostly silt because of the lack of chemical weathering (less clay)

Question 7

Dune

Answer 7

A hill or ridge of wind deposited sand

Question 8

Slip face

Answer 8

The steep leeward surface of a sand dune

Question 9

Loess

Answer 9

Deposits of wind blown silt lacking visible layers, buff colored, capable of maintaining a nearly vertical cliff

Question 10

How does wind carry its sediment load

Answer 10

Transports fine particles in suspension and larger as bed load. Less capable of picking up but can spread more than stream

Question 11

What sizes of sediments can wind move

Answer 11

Grains of sand/ fine particles

Question 12

What factors contribute to the type of dune that might result

Answer 12

Wind direction
Velocity
Sand availability
Amount of vegetation

Question 13

What kind of sedimentary rocks form in this environment (desert / wind)

Answer 13

I

Question 14

Bed load that wind carries

Answer 14

Sand grains

Question 15

Alpine glacier

Answer 15

Glacier confined to a mountain valley, which in most instances had been a stream valley

Question 16

Ice sheet

Answer 16

Very large thick mass of glacial ice flowing outward in all directions from one or more accumulation centers

Question 17

Snowline

Answer 17

The lower limit of perennial snow

Question 18

Zone of accumulation

Answer 18

The part of a glacier that is characterized by snow accumulation and ice formation. The outer limit of this zone is the snowline

Question 19

Zone of wastage

Answer 19

The part of a glacier beyond the snowline, where annually there is a net loss of ice

Question 20

Glacial budget

Answer 20

The balance or lack of balance between ice formation at the upper end of a glacier and ice loss in the zone of wastage

Question 21

Glacial striations

Answer 21

Stretches and grooves on bedrock caused by glacial abrasion

Question 22

Rock flour

Answer 22

Ground up rock produced by the grinding effect of a glacier

Question 23

Till

Answer 23

UNSORTED sediment deposited directly by a glacier

Question 24

Glacial erratic

Answer 24

An ice transported boulder that was not derived from the bedrock near its present site

Question 25

Moraine

Answer 25

H

Question 26

Different types of moraines

Answer 26

I

Question 27

Outwash plain

Answer 27

Relatively flat gently sloping plain consisting of materials deposited by melt water streams in

Question 28

Difference between continental Ice sheet and alpine glacier

Answer 28

Ice sheets cover a much larger area

Question 29

In a glacial system, how is sediment created

Answer 29

Plucking:Meltwater penetrates the cracks of the bedrock beneath and freezes, as the water freezes and expands it pries rocks loose

Abrasion: as the glacier slides over bedrock it functions like sandpaper, smoothing and polishing it

Question 30

What sizes of sediments can glaciers move

Answer 30

Large blocks

Question 31

What is the shape and landscape after a glacier has been present

Answer 31

Rugged angular, sharp, mountain area, produced by erosion from ALPINE glaciers

Question 32

What kind of sedimentary rocks form in this environment (glacial)

Answer 32

I