Question bank › GCSE › GCSE Geography › Paper 1 Section C – Physical landscapes in the UK

UK physical landscapes (coasts, rivers)

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Answer on paper first, then reveal the mark scheme one mark at a time.

6 marks · 7–8 minutes

6 marks – explain how a waterfall and gorge form

Using an example, explain how a waterfall and gorge are formed. [6 marks]

You may use a labelled diagram in your answer.

What is being assessed
  • AO1: show knowledge of places, environments and processes
  • AO2: show understanding by explaining how and why, in developed chains of reasoning
What examiners reward
  • The correct sequence of processes in order: differential erosion, undercutting, overhang, collapse, retreat
  • Precise erosion processes named and explained (hydraulic action, abrasion)
  • The gorge explained as a result of the waterfall retreating upstream
  • A named example with accurate rock types
LevelMarksWhat it looks like
Level 3 (Detailed)5–6Accurate, specific knowledge (named place or example where asked) is used to give a developed explanation, with clear links between cause and effect and the question set.
Level 2 (Clear)3–4Relevant knowledge and some explanation, but links are partial or one-sided, or place detail is limited.
Level 1 (Basic)1–2Basic, generic or isolated points with little explanation or place detail.
How to plan it
  1. Start: band of hard rock on top of softer rock in the upper course
  2. Soft rock eroded faster → step → plunge pool by hydraulic action and abrasion
  3. Undercutting → overhang → collapse → debris aids abrasion
  4. Repeated → waterfall retreats upstream → leaves a steep-sided gorge
  5. Example: High Force, River Tees – Whin Sill dolerite over softer Carboniferous sandstone and limestone
Show the top-band model answer

Waterfalls form in the upper course of a river where a band of resistant rock lies on top of a less resistant rock1. The softer rock is eroded more quickly than the hard rock, so a step develops in the river bed.

As water falls over the step, it erodes the softer rock at the base through hydraulic action, as the force of the water forces air into cracks2, and abrasion, as rocks carried by the river are swirled around and scrape the bed. This creates a deep plunge pool. The softer rock behind the waterfall is also undercut, leaving the hard rock above as an overhang3. Eventually the overhang is unsupported and collapses into the plunge pool. The fallen rocks are then used as tools for further abrasion4, deepening the plunge pool.

This process repeats many times, so the waterfall gradually retreats upstream5. As it moves back, it leaves behind a narrow, steep-sided valley called a gorge.

An example is High Force on the River Tees, where the water drops about 21 metres. Here a layer of hard dolerite, part of the Whin Sill, lies on top of softer sandstone and limestone6. The softer layers are undercut and the dolerite collapses, and the retreat of the waterfall has created a gorge downstream.

1. Starts with the essential condition – differential erosion – which earns the first credit.
2. Erosion process explained, not just named.
3. Correct sequence: undercutting comes before collapse.
4. Adds the feedback step that many answers miss.
5. Explicitly explains the gorge – the second landform in the question.
6. Accurate, specific rock detail makes the example count.
Where marks are usually lost
  • Describing what a waterfall looks like rather than explaining how it forms
  • Getting the sequence wrong (collapse before undercutting)
  • Forgetting the gorge, or saying the waterfall moves downstream
  • Naming erosion processes without explaining them
  • Unlabelled or unannotated diagrams that add nothing
6 marks · 7–8 minutes

6 marks – is hard engineering the best way to manage coastal erosion?

'Hard engineering is the best way to manage coastal erosion.'

Using an example of a coastal management scheme in the UK, to what extent do you agree with this statement? [6 marks]

What is being assessed
  • AO1: show knowledge of a named UK scheme and its strategies
  • AO2: show understanding of how the strategies work and their effects
  • AO3: evaluate the strategies and reach a supported judgement
What examiners reward
  • A named UK scheme with specific strategies and places
  • Explaining how each strategy works and its effects – including effects further along the coast
  • Comparing with an alternative (soft engineering or managed retreat)
  • A clear, supported judgement on 'best' (cost, effectiveness, environmental impact)
LevelMarksWhat it looks like
Level 3 (Detailed)5–6Detailed, accurate knowledge of a named UK scheme. How the strategies work and their effects are explained in developed chains of reasoning, and the answer reaches a clear, justified judgement on 'to what extent'.
Level 2 (Clear)3–4Clear knowledge of a scheme with some specific detail. Strategies and effects are explained, but evaluation is partial and the judgement only partly supported.
Level 1 (Basic)1–2Basic or generic knowledge, possibly without a named scheme. Strategies are described rather than explained, with little or no judgement.
How to plan it
  1. Holderness: soft boulder clay, erodes around 2 m a year
  2. Mappleton 1991: rock groynes + rock armour – village and road protected
  3. Problem: longshore drift starved further south – Cowden eroded faster
  4. Alternative: managed retreat at Medmerry – cheaper, creates habitat
  5. Judgement: best only where high-value assets justify the cost
Show the top-band model answer

The Holderness coast in East Yorkshire is one of the fastest-eroding coastlines in Europe, losing around 2 metres a year on average, because its cliffs are made of soft boulder clay1. At Mappleton, a scheme costing about £2 million was completed in 1991. Two rock groynes trap sediment moved south by longshore drift2, creating a wider beach that absorbs wave energy, and rock armour at the foot of the cliff breaks up waves. This has protected the village and its coast road3, showing that hard engineering gives reliable protection to valuable property.

However, because the groynes trap sediment, less reaches the coast further south, so the cliffs near Cowden have eroded more rapidly since the scheme was built. The problem has been moved rather than solved4, and hard engineering is also expensive to build and maintain.

Managed retreat can be more sustainable. At Medmerry in West Sussex5, completed in 2013, the sea was allowed to flood low-lying farmland behind a new inland embankment, creating saltmarsh that absorbs wave energy and provides habitat while protecting around 350 properties.

Overall, I only partly agree6. Hard engineering is best where valuable assets such as villages and roads must be protected, but because it is costly and increases erosion elsewhere, it is not the best approach for a whole coastline.

1. Explains WHY management is needed, using geology – accurate AO1/AO2.
2. Specific strategy explained with the process that makes it work.
3. Evaluates the scheme against its aim before considering drawbacks.
4. A sharp evaluative point showing the scheme's wider impact.
5. A named alternative to compare against, not just theory.
6. Clear judgement that says what 'best' depends on.
Where marks are usually lost
  • Describing types of hard and soft engineering in general with no named scheme
  • Saying groynes 'stop erosion' without explaining how they trap sediment
  • Forgetting the down-drift effects of hard engineering
  • Concluding 'it depends' without saying on what
  • Writing too much – this is a 6-mark question, so keep to two or three developed points and a judgement

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