Glaciation

Question 1

what is plucking

Answer 1

when water freezes onto rocks then plucks them away from tbe back wall

Question 2

what is abrasion

Answer 2

when rocks stuck in the ice grind the hollow like sand paper

Question 3

what is frost shattering

Answer 3

when water gets into small crack, freezes and expands shattering the rock

Question 4

what is the formation of an esker

Answer 4

• meandering ridge along a valley floor
• they are formed when meltwater gets underneath the glacier
• made up of meltwater, sands and gravel - sorted by size as the heavier rocks are dropped first by the water
• Stones are rounded as flowing water rounding them by erostion
• When temperatures rise or latitudes are low glascier starts to melt

Question 5

formation of drumlin

Answer 5

• hills of unsorted glacial depostits
• formed when the glacier becomes overloaded by sediment
• The glacier streamlines the sediment as it overflows
• found in swarms

Question 6

terminal moraine

Answer 6

• ride across a valley floor which is unsorted
• made up of glacial deposits
• glacier moves downhill bulldozing sediment infront of the snout
• on lower altitudes or when temperatures rise glacier loses power and moraine is deposited