Glacial Erosion (Leaving Cert Geography): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What are the two primary mechanisms of glacial erosion?
What are the two primary mechanisms of glacial erosion?
Plucking and abrasion
By what percentage does water expand when it refreezes in rock cracks during plucking?
By what percentage does water expand when it refreezes in rock cracks during plucking?
9%
What are the deep scratches carved into bedrock by abrasion called?
What are the deep scratches carved into bedrock by abrasion called?
Striae or striations
How does glacial thickness affect the rate of erosion?
How does glacial thickness affect the rate of erosion?
Thicker glaciers create more pressure
Why do glaciers on steeper slopes have greater erosive power?
Why do glaciers on steeper slopes have greater erosive power?
They flow faster
How many steep sides does a cirque typically have?
How many steep sides does a cirque typically have?
Three steep sides
What is a bergschrund?
What is a bergschrund?
A deep crevasse in a cirque glacier
On which slopes did most Irish cirques form?
On which slopes did most Irish cirques form?
North or north-east facing slopes
What forms when two cirques develop on either side of the same mountain?
What forms when two cirques develop on either side of the same mountain?
An arête
What shape are glaciated valleys?
What shape are glaciated valleys?
U-shaped with steep sides and flat floor
What are truncated spurs?
What are truncated spurs?
Triangular cliffs from eroded spurs
What is a tarn?
What is a tarn?
A water-filled cirque after glaciers melt