Unit 7: Option A — Freshwater: Drainage Basins
Topic 7.1: Drainage basin hydrology and geomorphology Questions
Practice 20 exam-style questions for IB Geography SL Topic 7.1. Review the question stems below, then unlock the full Question Bank to access markschemes, model answers, and AI grading.
1Explain3 marks
• Aimnova practice
Explain the sequence of depositional processes by which a river builds a delta.
Markscheme and model answer locked
Unlock Question2identify1 mark
• Aimnova practice
Lag time on a storm hydrograph is the gap between…
Markscheme and model answer locked
Unlock Question3identify1 mark
• Aimnova practice
A short lag time and high peak discharge describe a basin that is…
Markscheme and model answer locked
Unlock Question4Estimate4 marks
• Aimnova practice
The table tracks four parts of a drainage-basin system as a share of the rainfall during one rainfall event.
Markscheme and model answer locked
Unlock Question5identify1 mark
• Aimnova practice
Which factor would lengthen a basin's lag time?
Markscheme and model answer locked
Unlock Question6identify1 mark
• Aimnova practice
Moving downstream, discharge and hydraulic radius usually…
Markscheme and model answer locked
Unlock Question7Outline4 marks
• Aimnova practice
A small drainage basin's discharge rose after its land use changed. Outline two land-use changes that could explain this rise, and state how each increases run-off.
Markscheme and model answer locked
Unlock Question8Outline2 marks
• Aimnova practice
A rural drainage basin has a short lag time. Outline one reason for this and develop how that factor speeds the river's response.
Markscheme and model answer locked
Unlock Question9Outline4 marks
• Aimnova practice
Outline two physical factors, other than rock type, that can make a drainage basin respond quickly to a storm.
Markscheme and model answer locked
Unlock Question10Outline2 marks
• Aimnova practice
Outline how river discharge and hydraulic radius are related as you move downstream.
Markscheme and model answer locked
Unlock Question11State4 marks
• Aimnova practice
The storm hydrograph below shows rainfall and the discharge of two contrasting basins after one storm.
Markscheme and model answer locked
Unlock Question12Estimate3 marks
• Aimnova practice
The table shows the peak annual discharge of a small river recorded in two decades.
Markscheme and model answer locked
Unlock Question13Explain4 marks
• Aimnova practice
Explain how urbanisation changes the shape of a river's storm hydrograph.
Markscheme and model answer locked
Unlock Question14Explain4 marks
• Aimnova practice
Explain how the permeability of the rock in a drainage basin affects its storm hydrograph.
Markscheme and model answer locked
Unlock Question15identify1 mark
• Aimnova practice
A river deposits its load mainly when…
Markscheme and model answer locked
Unlock Question16identify1 mark
• Aimnova practice
On a meander, the outer bend is where the river…
Markscheme and model answer locked
Unlock Question17identify1 mark
• Aimnova practice
Abrasion erodes a river channel when…
Markscheme and model answer locked
Unlock Question18identify1 mark
• Aimnova practice
A waterfall retreats upstream because…
Markscheme and model answer locked
Unlock Question19identify1 mark
• Aimnova practice
River discharge is the volume of water passing a point each…
Markscheme and model answer locked
Unlock Question20identify1 mark
• Aimnova practice
A delta is most likely to form where a river…
Markscheme and model answer locked
Unlock QuestionReady to practice Topic 7.1?
Get instant AI feedback on your answers, view detailed markschemes, and track your progress across all IB Geography SL topics.