AQA GCSE Geography A Q1,6,7 Unofficial Markscheme 2017 Watch

B0redBrioche
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1a) A plate margin is the boundary between two tectonic plates. (1) Exemplification- e.g. destructive plate margin, constructive or any named plate boundary (e.g. Indo-Australian and Eurasian) (1)

ai) Destructive- Oceanic and continental move together due to convection currents. (1)
Oceanic crust subducts beneath Continental as denser but at constructive plate boundaries plates move apart due to convection currents and lava flows up and creates new land. (1)
Shield volcanoes=constructive, composite volcano= destructive (1)
Any other valid comparisons

b) Hazards of Volc (8)
- Ash in the air causes breathing problems
-Disrupts plane travel
-Mudflow/pyroclastic flow destroys buildings and vegetation
-Land is lost for farming
-Biodiversity is reduced due to destruction of land
-People can be killed by pyroclastic flow
-Ash causes irritation and visual pollution
-Maybe reference to a case study (Eyjafjallajokull, Nyiragongo)

c) Monitoring volcanoes (6)
- Seismometers to see pick up small tremors precursor to eruption
- Satellites to monitor the change in shape of the volcanoes
- Sulfur Dioxide gas increases
- Land starts bulging - tiltmeters

d)
Distribution around plate boundaries and around the ring of fire in the Pacific. (1)
Quoting evidence from map e.g. high density along South America Western coastline (1)
Not really sure what the other mark was for maybe talking about the severity of the tsunami being lower if it's triggered in the middle of the ocean rather than on the coast? (1)

e)Tsunami case study - 2004 Boxing Day tsunami - 9.0 Richter scale- megathrust undersea earthquake at the Indo-Australian plate boundary . 2 sea shelves created displacing large amounts of water causing a tsunami which affected 13 countires (3)

Other questions will be done later because I have D+T revision to do

6a) Sketch Map- Weird question but I basically copied the map above and annotated the river being the melt water and one of the settlements were built after 1644 after the glacier had retreated. (4)

b) Landforms in picture- Arete, Moraine,Scree, steep back wall, corrie, cliffs, interlocking spurs? (3)

bi) Hanging valley - A hanging valley is created when a tributary glacier joins the main glacier. This is due to the main glacier eroding at a faster rate and eroding more of the land creating a land height difference which is called a hanging valley. Refer to plucking, abrasio, rotational slip etc. Maybe marks for how a glacier is formed

c) Tourism - People may come to glacial areas to experience winter sports such as skiing and snowboarding for thrill and excitement. E.g. Chamonix (2)

d) Pros and Cons on tourism in Chamonix map-

Pros:
-Local Employment (Trail guide)
-Local economy thrives allowing for better infrastructure

Cons:
-Footpath erosion of trails
-Air pollution from congestion of cars and buses
-Litter

Refer to things on the map (e.g. bus station)

Any other points which refer to the map and are creditable (4)

e)'Glacial retreat can hurt the economy of tourist resorts and so will damage the fragile environment to sustain their economy' or something like that (8)

- Snow cannons for artificial snow - drilling into ice damage environment
- Ski lifts to get to higher up where there is more snow- construction damage
- Building of indoor attractions to be all year round- construction damage
- Lorries and Trucks to transport construction materials- air pollution
- Deforestation to make space for the buildings
- Any more?
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Queenie123
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Thank you for doing this xx
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B0redBrioche
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Question 6 complete
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B0redBrioche
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(Original post by Queenie123)
Thank you for doing this xx
No problem!
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username3167456
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For 1b) would reference to lahars, volcanic ash settling on towns etc be relevant? I was really stuck whether I was supposed to use a case study so I linked it back to Montserrat where I could... Feeling okay though as mentioned quite a few things you said.

thanks for this!
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B0redBrioche
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(Original post by samwesttt)
For 1b) would reference to lahars, volcanic ash settling on towns etc be relevant? I was really stuck whether I was supposed to use a case study so I linked it back to Montserrat where I could... Feeling okay though as mentioned quite a few things you said.

thanks for this!
Yeah that sounds pretty good, I'm sure you'll get marks for it and referring to a case study will only strengthen your answer. Too bad I spelt Ejyafjallajokull wrong in the exams -_-

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XxxvatxxX
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Please someone do Q5
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Fox Corner
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Nice one! I've added this to the unofficial markscheme list
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m!ek
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Also for the glacial retreat 8 marker, pressure will be put on the higher land with the remaining glacier and snow so causing more avalanches and erosion of the mountain
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