4.6 Flashcards
1
Q
What does the upper course look like?
A
Steep valley sides, V shaped valleys.
Narrow river
2
Q
Middle course?
A
Meanders
Wider river
Low lying valleys
3
Q
Lower course?
A
Deeper river
4
Q
What is hydraulic action?
A
Air gets into crack, water compresses it, forces crack apart when water leaves.
5
Q
What is abrasion?
A
Sediment smashes against cliff, wearing it down
6
Q
What is attrition?
A
Sediment smashes against each other, making the, smaller and rounder
