Glaciation

Question 1

Névé

Answer 1

Low density granular snow consisting of ice crystals

Question 2

Sensible heat

Answer 2

The amount of heat energy that occurs when an object is heated. When an object’s temp falls, the heat removed is also called sensible heal

Question 3

Sublimation

Answer 3

Solid straight to gas e.g ice to water vapour

Question 4

Accumulation

Answer 4

The addition of snow or ice to a glacier

Question 5

Ablation

Answer 5

The natural removal of snow or ice to a glacier

Question 6

Accumulation zone

Answer 6

The area of net gain in a glacier

Question 7

Ablation zone

Answer 7

The area of net loss in a glacier

Question 8

Zone of equilibrium

Answer 8

Net gain of snow = net loss of snow

Question 9

Paleoclimatic

Answer 9

Climatic conditions in the geological past or reconstructed from a direct or indirect data source

Question 10

Pleistocene era

Answer 10

The first epoch of the quaternary period

Question 11

Altitude

Answer 11

The height above sea level

Question 12

Latitude

Answer 12

The distance north or south of the equator

Question 13

Permafrost

Answer 13

Areas of permanently frozen ground

Question 14

Thermohaline system

Answer 14

Part of the ocean circulation, caused by differences in water density, temp and salinity

Question 15

Ice lenses

Answer 15

Formed when moisture in the soil accumulate under rocks, they then freeze

Question 16

Glacial period

Answer 16

A time period when ice masses develop and advance into lower latitude

Question 17

Interglacial period

Answer 17

A time period when glaciers retreat to the polar regions

Question 18

Internal deformation

Answer 18

Small scale movement of ice due to gravity. The ice crystals become unaligned

Question 19

Crevasse

Answer 19

Large deep fractures in a glacier, caused by extensional flow

Question 20

Basal sliding

Answer 20

The large scale movement of ice due to glacial melt water, only in warm based glaciers

Question 21

Pressure melting point

Answer 21

The temperature at which ice melts under pressure, can occur below freezing

Question 22

Seracs

Answer 22

Steep faults on the surface of a glacier

Question 23

Extensional flow

Answer 23

Ice is moving faster at the front of the glacier so the ice is stretched, causing crevasses

Question 24

Compressional flow

Answer 24

The ice behind is moving faster than the front so a build up of ice occurs

Question 25

Abrasion

Answer 25

Rock on rock action wearing away the sides and bottom of a glacier emg rocks in a glacier on the bedrock below

Question 26

Plucking

Answer 26

When ice freezes to the rock below and moves, pulling it out of the ground

Question 27

Rotational slip

Answer 27

When a glacier begins to rotate with mass, this causes erosion on the sides and back wall