Cold environments

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1. What is abrasion?

  • occurs in areas where temperatures rise during the day but drop below freezing at night for a substantial part of the winter.
  • is a series of processes that operate under a patch of snow leading to the disintegration of the rock surface.
  • occurs when the material the glacier is carrying rubs away at the valley floor and sides.
  • involves the glacier freezing onto and into rock outcrops.
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Other questions in this quiz

2. what are the types of moraines?

  • recessional, medial, lateral, terminal
  • push, recess, medieval, stop
  • recess, evil, medial, shunt

3. what can be created from frost heave?

  • an esker
  • squares and triangles
  • stone strips and polygons
  • an irregular permafrost pattern

4. What is the zone of ablation?

  • where outputs exceed inputs and therefore more mass is lost rather than gained. This is the lower part of the glacier.
  • where inputs exceed outputs and therefore where more mass is gained than lost over a year. This is the upper part of the glacier.
  • the difference between the total accumulation and the total ablation during 1 year.
  • a negative balance in summer where ablation exceeds accumulation and the reverse in winter.

5. what is a varve?

  • deposits with distinct layering
  • sand and pebbles
  • a bad human name
  • a stream discharge increase


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