glacier final exam

Question 1

what are glaciers?

Answer 1

3 mile thick blocks of ice that flow with gravity

Question 2

Types of glaciers

Answer 2

Mountain glaciers and continental glaciers

Question 3

form from ice river shapes and flow from high to low elevations in mountain setttings

Answer 3

Mountain glaciers

Question 4

large land masses covered in ice, flow as function of gravity

Answer 4

continental glaciers

Question 5

Three conditions to form glaciers

Answer 5

more snow has to fall and stay put, no removal of snow, and can be a function of altitude or latitude

Question 6

how do glaciers move?

Answer 6

Water flows along base; water reduces the friction

Question 7

What is meant by brittle flow, plastic flow and basal slip?

Answer 7

Brittle flow refers to the cracks being made at the top due to movement. Plastic flow refers to the ductile characteristic in the deeper parts of the glacier; basal slip refers to the smooth bottom from the water to allow the glacier move with gravity and slide

Question 8

What is a horn?

Answer 8

result o fmultiple glaciers going away from each other leaving a peak

Question 9

What is acrete

Answer 9

two glaciers scooping out

Question 10

what is a cirque?

Answer 10

The area of the mountain that is separated by a moraine

Question 11

What is a U shaped valley?

Answer 11

The result of cirques and form glacial movement

Question 12

what are hanging valleys?

Answer 12

Result of glacial retreat and are narrowed U shaped valleys

Question 13

large boulders out of place

Answer 13

glacial erratics

Question 14

pile of rubble from glacier usually in edges of sediment and rocks in the middle

Answer 14

medianmoraines

Question 15

sediment dropped by glacial ice

Answer 15

glacial till

Question 16

sediment transported in meltwater that is dominated by sand and gravel

Answer 16

outwash plain

Question 17

pile of sediment that acts as an edge on the side of U shaped valleys

Answer 17

lateral moraine

Question 18

form at the stable toe of a glacier

Answer 18

end moraines

Question 19

form at the farthest edge of flow

Answer 19

terminal moraines

Question 20

form as retreating ice stalls

Answer 20

recessional moraines

Question 21

long aligned hills of molded lodgment till

Answer 21

drumlins

Question 22

till left behind by rapid ice retreat

Answer 22

ground moraine

Question 23

long, sinuous ridges of sand and gravel and form as meltwater channels within or below the ice

Answer 23

eskers

Question 24

melted stranded ice blocks form hole in land after melting

Answer 24

kettle lakes

Question 25

changes how earth reactts in the solar system; looks at orbital changes

Answer 25

milankovich cycle

Question 26

How did milaknovich cycle affect glacial extent and the ice ages

Answer 26

The earth being tilted will have different sun positioning causing it to experience heat n varying time frames. It is also due to the tilt of the earth that sparks ice ages and times of glaciers