Periglacial Features and Landforms (AQA A-Level Geography): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What is the typical range of annual average temperatures in periglacial regions?
What is the typical range of annual average temperatures in periglacial regions?
-15°C to -1°C
What percentage of Earth's land surface is currently covered by permafrost?
What percentage of Earth's land surface is currently covered by permafrost?
20-25%
In continuous permafrost areas, how deep is the active layer typically?
In continuous permafrost areas, how deep is the active layer typically?
0.5 metres
What is the minimum slope angle on which solifluction can occur?
What is the minimum slope angle on which solifluction can occur?
2°
What is the name for unfrozen ground below the frozen permafrost layer?
What is the name for unfrozen ground below the frozen permafrost layer?
Talik
Why are stones pushed upward during frost heave in patterned ground formation?
Why are stones pushed upward during frost heave in patterned ground formation?
Lower specific heat capacity
What creates the milky appearance of ice wedges?
What creates the milky appearance of ice wedges?
Air bubbles trapped in ice
Which type of pingo forms through hydrostatic pressure beneath former lake beds?
Which type of pingo forms through hydrostatic pressure beneath former lake beds?
Closed system pingo
What is the typical diameter range of ice-wedge polygons?
What is the typical diameter range of ice-wedge polygons?
15-30 metres
What causes thermokarst depressions to form in periglacial landscapes?
What causes thermokarst depressions to form in periglacial landscapes?
Human activity warming permafrost