61. What is the name for the process by which glaciers create U-shaped valleys by eroding the sides and bottom of a V-shaped valley?
a) Glacial scouring
b) Glacial plucking
c) Glacial abrasion
d) Glacial erosion
62. Which of the following is a type of glacial deposit that forms when a glacier deposits sediment in a depression it has created in the ground?
a) Esker
b) Kame
c) Drumlin
d) Moraine
63. What is the name for the process by which glaciers deposit sediment as they melt?
a) Ablation
b) Accumulation
c) Sublimation
d) Basal sliding
64. Which of the following is a type of glacial feature that forms when a glacier cuts a narrow, steep-walled gorge through a mountain range?
a) Horn
b) Arete
c) Col
d) Valley
65. What is the name for the process by which glaciers move by sliding along a layer of water at their base?
a) Basal sliding
b) Internal deformation
c) Shear deformation
d) Plastic deformation
