WJEC (B) GCSE Geography Theme 2 Topic 2 Click to continue Hodder Education Revision Lessons Water supply
Dec 26, 2015
WJEC (B) GCSE Geography
Theme 2 Topic 2
Click to continue
Hodder Education Revision Lessons
Water supply
WJEC (B) GCSE Geography
Theme 2 Topic 2
1 Work in pairs. Number yourselves 1 and 2.
2 Number 1s face the board. Number 2s must face away from the board.
3 You are going to be shown a diagram.
4 Number 1s must describe the diagram to number 2s.
5 Number 2s must draw the diagram on A3 paper, based on Number 1’s description.
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The water cycle
WJEC (B) GCSE Geography
Theme 2 Topic 2
List as many stores as you can from the diagram.
Stores
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WJEC (B) GCSE Geography
Theme 2 Topic 2
Stores
Clouds
Ocean/sea
Soil
Rock
Trees/plants
Ice/snow
Lake
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WJEC (B) GCSE Geography
Theme 2 Topic 2
Transfers
List as many transfers as you can from the diagram.
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WJEC (B) GCSE Geography
Theme 2 Topic 2
Transfers
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Evaporation
Precipitation
Transpiration
Groundwater flow
Throughflow
Streamflow
Surface runoff
Infiltration
Percolation
Snow melt
WJEC (B) GCSE Geography
Theme 2 Topic 2
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Routes to the ocean
Describe four routes by which rainfall mightreach the ocean.
WJEC (B) GCSE Geography
Theme 2 Topic 2
1 Precipitation fall flows over the surface to the ocean.
2 Precipitation falls and lands on leaves of trees, drips off (stem flow) and flows over the ground as surface runoff (e.g. as a stream).
3 Rain infiltrates soil and flows through soil as throughflow.
4 Rain infiltrates soil and flows through saturated zone as groundwater flow. Click to
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Routes to the ocean
WJEC (B) GCSE Geography
Theme 2 Topic 2
Question: Explain how cutting down trees might affect the water cycle. (3 marks)
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Exam practice
Exam tips
• The question says ‘explain’, so you should try to use the words ‘so’ and ‘because’ in your answer.
• Use key words from the water cycle diagram.
• Don’t write the question out again — it wastes time.
WJEC (B) GCSE Geography
Theme 2 Topic 2
Question: Explain how cutting down trees might affect the water cycle. (3 marks)
1 Less interception
2 Loss of a store of water
3 Less transpiration
4 Increased surface runoff
So, a good answer would be:
There would be less interception of rain [1 mark], so there
would be greater surface runoff [1 mark] and a loss of a store
of water [1 mark].Click to
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Exam practice
WJEC (B) GCSE Geography
Theme 2 Topic 2
Question: Explain one way that human activity can change the water cycle. (2 marks)
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Exam practice
Exam tips
• The question says ‘one way’, so you need to give only one example.
• The question says ‘explain’, so you should try to use the words ‘so’ and ‘because’ in your answer.
• Use key words from the water cycle diagram.
• Don’t write the question out again — it wastes time.
WJEC (B) GCSE Geography
Theme 2 Topic 2
Question: Explain one way that human activity can change the water cycle. (2 marks)
1 Tarmacking/concreting the ground = water can’t infiltrate
2 Cutting down trees (deforestation) = loss of store, less interception, increased surface runoff
3 Planting trees (reforestation or afforestation) = creates a store, more interception, slows surface runoff
4 Building a reservoir or dam = increased evaporation
5 Farming = planting crops creates a store, harvesting removes a store
6 Industry = takes water out of a system
7 Building a well or borehole = takes a water store from aquifer
So, a good answer would be:
Concreting the ground [1 mark] would stop the water infiltrating the ground. [1 mark] Click to
continue