How do glaciers affect underlying rock? What will be an ideal ...

[vicky]

How do glaciers affect underlying rock?
 
  What will be an ideal response?

Question 2

Glaciers flow downslope. A glacier moves fastest
 
  A) when it begins to melt.
  B) at its surface and in the center.
  C) at its base and along its sides.
  D) when ablation exceeds accumulation.

[Jane]

Answer to Question 1

Answer: Glaciers erode rock by scraping, plucking, and grinding underlying rock into sizes ranging from boulders to fine dust. Alpine glaciers erode cirques, horns, and aretes at their heads; U-shaped valleys and hanging valleys in their main courses; and fjords where glaciers end their journey at the sea. Continental glaciers erode the land surface that they cover, smoothing and rounding the entire underlying topography.

Answer to Question 2

Answer: B