P2 Whiteboard questions

Question 1

Explain how waterfalls are formed

Answer 1

• more resistant rock over less resistant rock
• less resistant rock erodes creating a step
• overhang is created
• overhang cannot withstand pressure, it breaks and rocks fall down
• a plunge pool is created, hydraulic action and from falling rocks.

Question 2

Explain the processes that happen in a meander

Answer 2

deposition - inside - current slower
erosion - outside - current faster

Question 3

Explain how human activities can affect storm hydrographs

Answer 3

• urbanisation
• land-use change
• deforestation
• building on floodplains
• not dredging