Weather and climate challenges (Edexcel GCSE Geography A): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What is discharge in a river system?
What is discharge in a river system?
Amount of water flowing through a river
How does increasing discharge affect erosive power?
How does increasing discharge affect erosive power?
Increases exponentially
What happens to sediment transport during dry periods?
What happens to sediment transport during dry periods?
Rivers deposit sediment
What causes freeze-thaw weathering in river valleys?
What causes freeze-thaw weathering in river valleys?
Water freezing & expanding in rock cracks
By what percentage does water expand when it freezes?
By what percentage does water expand when it freezes?
Approximately 9%
Why are storm events described as a 'double threat'?
Why are storm events described as a 'double threat'?
Increase flood risk & erosion damage
What happens to soil during extended dry periods?
What happens to soil during extended dry periods?
Becomes baked hard, can't absorb water
When do some of the most serious floods occur?
When do some of the most serious floods occur?
After dry spells
How does frozen ground affect water infiltration?
How does frozen ground affect water infiltration?
Prevents it, becoming impermeable
What surface does frozen ground resemble regarding permeability?
What surface does frozen ground resemble regarding permeability?
Concrete or tarmac
How far downstream can upland storms cause flooding?
How far downstream can upland storms cause flooding?
Hundreds of kilometres away
What are natural levees?
What are natural levees?
Raised banks parallel to river channel