Glaciers

46. Which of the following is not a type of glacial till?
a) Lodgment till
b) Ablation till
c) Flow till
d) Deformation till

47. What is the name for the process by which glaciers leave behind large boulders and rocks as they retreat?
a) Plucking
b) Abrasion
c) Deposition
d) Meltwater erosion

48. Which of the following is a type of glacial lake that forms behind a moraine?
a) Proglacial lake
b) Kettle lake
c) Tarn lake
d) Cirque lake

49. What is the name for the process by which glaciers move downhill?
a) Melting
b) Sublimation
c) Flow
d) Ablation

50. Which of the following is a type of glacier that covers a large area of land and is not confined to a valley?
a) Alpine glacier
b) Continental glacier
c) Hanging glacier
d) Tidewater glacier