P1C 09 Periglacial Landscapes Quiz

What is the process called when the active layer mud flows over the solid permafrost layer down a slope during summer thaw?

• Solifluction

• Frost heave

• Freeze thaw

• Thermokarst

What is the type of mass movement of soil particles by repeated freezing and thawing on slopes in periglacial regions called?

• Solifluction

• Frost heave

• Freeze thaw

• Thermokarst

What is the term for ground that remains continuously at or below 0 degrees Celsius for at least two consecutive years?

• Permafrost

• Patterned ground

• Pingos

• Thermokarst

What are the geometric patterns formed in periglacial landscapes called?

• Polygons

• Stone circles

• Pingos

• Thermokarst

What are large conical shaped hills with ice in the center and a thin layer of vegetation covering them called?

• Polygons

• Stone circles

• Pingos

• Thermokarst

What is the term for a landscape characterized by irregular surfaces of hollows and small hummocks found in periglacial regions?

• Permafrost

• Patterned ground

• Pingos

• Thermokarst

What causes the formation of different hummocks and hollows in a thermokarst landscape?

• Solifluction

• Frost heave

• Freeze thaw

• Uneven subsiding or rising of the soil

Which type of weathering is causing the formation of shattered rocks?

• Physical weathering

• Chemical weathering

• Biological weathering

• Thermal weathering

Why is permafrost more common in North America & Asia but less so in Western Europe?

• The Gulf Stream raises teh temperature over Europe

• Difference in elevation, Europe is lower.

• Difference in precipitation

• Difference in vegetation, Europe has more broad-leaf trees.

Why does permafrost not occur at a depth of more than 100m below the surface?

• Lack of freezing temperatures

• Temperatures increase in layers deeper down

• Lack of organic matter

• Lack of pressure