Unit 3

Question 1

straition

Answer 1

grooves gouged in bedrock formed by rocks frozen in the ice and run in the same direction as movement of glaciers

Question 2

spillways

Answer 2

deep, wide valleys formed by glacier melt water

Question 3

misfit streams

Answer 3

small streams in the middle of spillways that occur when melt water disappears

Question 4

till plains

Answer 4

till is material like gravel, clay and sand in ice.
- gently rolled plains formed by deposits of sand, clay and gravel from glaciers and if not acted upon by water, are pointy and angular

Question 5

lake plains

Answer 5

fertile and flat plains formed by deposits of silt and glacial meltwater (good for agriculture

Question 6

moraines

Answer 6

an ice sheet that has deposited till at it’s edge, hilly swapy, and thin soil (good for forestation)

Question 7

drumlins

Answer 7

an egg-shaped hill with a steep side (wide end) and a gentle slope formed when glaciers move deposited material over (soil is well drained)

Question 8

erratics

Answer 8

are picked up by ice sheets and carried hundreds of km over to make up different bedrock. ex- rocks from the canadian shield were carried hundreds on km away/to the lowlands

Question 9

eskers

Answer 9

when rivers flow within melted ice, they carry sand and gravel and lay them in a river bed (are left as steep-sided ridges)

Question 10

alpine glacier

Answer 10

formed in the mountains and move down valleys by gravity “sharpening” the features of the mountain to look rugged

Question 11

continental glaciers

Answer 11

move outward under their own ice and snow weight. the surface becomes smoother since they erode at high points of terrain and deposit eroded material is at the bottom

Question 12

folding

Answer 12

happens over a long period of time when the rock layers bend together instead of break due to high temperatures and pressure. the pressure currents are exerted to the midddle, causing folding ridges

Question 13

faulting

Answer 13

is fractures in bedrock along where movement has taken place and appear in the Earth’s crust by stress of convention currents that occur in the mantle. If the rock is brittle or bends quick, it breaks and forms a fault

Question 14

plate tectonics

Answer 14

the internal forces that deform the Earth’s crust
- there are 20 located in water bodies and land
- the plates move due to uneven distribution of heat, and move over a weak layer of hot rock hundreds of km below the surface

Question 15

glacier advance

Answer 15

glaciers advance when the rate of snow is lower than the rate of accumulation

Question 16

glacier retreat

Answer 16

glaciers retreat when the rate of melt is greater than rate of accumulation