AQA CERTIFICATE GEOGRAPHY 8031/1 – Dynamic Physical World Mark scheme 8031 June 2014 Version 0.1/Stage: Final Mark schemes are prepared by the Lead Assessment Writer and considered, together with the relevant questions, by a panel of subject teachers. This mark scheme includes any amendments made at the standardisation events which all associates participate in and is the scheme which was used by them in this examination. The standardisation process ensures that the mark scheme covers the students’ responses to questions and that every associate understands and applies it in the same correct way. As preparation for standardisation each associate analyses a number of students’ scripts: alternative answers not already covered by the mark scheme are discussed and legislated for. If, after the standardisation process, associates encounter unusual answers which have not been raised they are required to refer these to the Lead Assessment Writer. It must be stressed that a mark scheme is a working document, in many cases further developed and expanded on the basis of students’ reactions to a particular paper. Assumptions about future mark schemes on the basis of one year’s document should be avoided; whilst the guiding principles of assessment remain constant, details will change, depending on the content of a particular examination paper. Further copies of this Mark Scheme are available from aqa.org.uk Copyright © 2014 AQA and its licensors. All rights reserved. AQA retains the copyright on all its publications. However, registered schools/colleges for AQA are permitted to copy material from this booklet for their own internal use, with the following important exception: AQA cannot give permission to schools/colleges to photocopy any material that is acknowledged to a third party even for internal use within the centre. MARK SCHEME – Level 1/2 Certificate in Geography – 8031/1 – June 2014 GENERAL GUIDANCE FOR GEOGRAPHY EXAMINERS Quality of Written Communication Where candidates are required to produce extended written material in English, they will be assessed on the quality of written communication. Candidates will be required to: present relevant information in a form and style that suits its purpose; ensure that text is legible and that spelling, punctuation and grammar are accurate; use specialist vocabulary where appropriate. Levels Marking - General Criteria Where answers are assessed using a level of response marking system the following general criteria should be used. Level 1: Basic Knowledge of basic information Simple understanding Little organisation; few links; little or no detail; uses a limited range of specialist terms Reasonable accuracy in the use of spelling, punctuation and grammar Text is legible. Level 2: Clear Knowledge of accurate information Clear understanding Organised answers, with some linkages; occasional detail/exemplar; uses a good range of specialist terms where appropriate Considerable accuracy in spelling, punctuation and grammar Text is legible. Level 3: Detailed Knowledge of accurate information appropriately contextualised and/or at correct scale Detailed understanding, supported by relevant evidence and exemplars Well organised, demonstrating detailed linkages and the inter-relationships between factors Clear and fluent expression of ideas in a logical form; uses a wide range of specialist terms where appropriate Accurate use of spelling, punctuation and grammar Text is legible Level 3 does not always equate to full marks, a perfect answer is not usually expected, even for full marks. 3 of 19 MARK SCHEME – Level 1/2 Certificate in Geography – 8031/1 – June 2014 Annotation of Scripts One tick equals 1 mark, except where answers are levels marked (where no ticks should be used). Each tick should be positioned in the part of the answer which is thought to be creditworthy. Where an answer is levels marked the examiner should provide evidence of the level achieved by means of annotating ‘L1’, ‘L2’ or ‘L3’ in the left hand margin. The consequent mark within this level should appear in the right-hand margin. Ticks must not be used where an answer is levels marked. Examiners should add their own brief justification for the mark awarded e.g. Just L3, detail and balance here. Where an answer fails to achieve Level 1, zero marks should be given. General Advice It is important to recognise that many of the answers shown within this mark scheme are only exemplars. Where possible, the range of accepted responses is indicated, but because many questions are open-ended in their nature, alternative answers may be equally creditworthy. The degree of acceptability is clarified through the standardisation process and subsequently by telephone with the Team Leader as necessary. Diagrams are legitimate responses to many questions and should be credited as appropriate. However, contents which duplicate written material or vice versa should not be credited. Quality of Written Communication (QWC) is part of the award of marks in levels marked answers only. In levels marked answers the quality of the geography is assessed and a level and mark awarded according to the geography. As is sometimes the case, the geography may be sound at a particular level but the examiner may not be sure as to whether there is quite enough to raise the mark within that level. In this case, the examiner should consider the QWC of the answer. QWC that fulfils the criteria for the level should lead to the rise in the mark but where the QWC does not fulfil the criteria, the answer should remain at the mark first thought appropriate. In cases where QWC has been used in the award of marks, the examiner should indicate this with QWC and arrows that indicate either an upward or downward trend according to its impact on the final award of the mark. 4 of 19 MARK SCHEME – Level 1/2 Certificate in Geography – 8031/1 – June 2014 Tectonic Activity and Hazards 1 (a)(i) Composite volcano 1(a)(ii) The first volcano has a rounded shape, gentle sided, particularly on the left of the volcano (1). By contrast the second volcano is steep sided, symmetrically shaped, with deep scars or gullies cut into the side of the cone (1). Accept one valid statement about each volcano if a difference is implied. Allow any valid difference based on photograph eg symmetrical/asymmetrical shape, concave/convex slope, dome/cone shape, crater/no crater, area around Fuji more fertile. (2 marks) AO2 – 1 AO3 – 1 1(a)(iii) 2 x 1 or 1 x 2 (2 marks) AO1 – 2 Viscosity of lava (1). The main factor is the type of material ejected during the eruption (1). Acid lava produces steep sided cones because the lava has a high viscosity and therefore cools slowly (1). Basic lava is runny and spreads out quickly (1). It cools slowly and produces gently sloping cones (1). Other factors affecting shape might include the number of previous eruptions, the formation of secondary cones, etc. 1(b)(i) 3750 1(b)(ii) Supervolcanoes produce (much) more lava than volcanoes (1-reserved mark). The Yellowstone caldera produced 2500 times more lava than Mount St Helens (1). Allow other reference to and/or manipulation of data for second mark. (1 mark) AO1 – 1 (1 mark) AO3 – 1 (2 marks) AO2 – 1 AO3 – 1 5 of 19 MARK SCHEME – Level 1/2 Certificate in Geography – 8031/1 – June 2014 1(b)(iii) Ash is the biggest problem. It can: kill and sicken humans and animals, reduce sunlight, trigger rainfall causing lahars, severely disrupt air, road and rail transport, crush buildings – 30cm of dry ash is enough to collapse a roof, contaminate water supplies, kill crops and other vegetation, clog machinery such as air filters. (4 marks) AO1 – 2 AO2 – 1 AO3 – 1 A case study is not needed but Yellowstone or Tora (Indonesia) are likely examples. Effects likely to refer to impact in immediate area of an eruption – many deaths (87 000 predicted), large ash cloud rising 40 – 50km into atmosphere, destruction of 10 000 square km of land, ash 15cm think covering buildings within 10 000km, flights suspended, livestock and farmland affected. The UK would see the arrival of the ash five days after the eruption; temperatures would fall between 12 and 15 degrees. Parts of Europe and America and Asia would see constant snow cover for three years, crops would fail, monsoon rains would fail, 40% of population could face starvation. Level 1 Basic (1-2 marks) Describes effects of a supervolcano eruption. Statements are general in a random order. A massive amount of ash and lava would reach the ground - up to 2500 cubic km was released in the first Yellowstone eruption. Some ash will travel around in the atmosphere. Lots of people will die. People will choke to death. Buildings will collapse. Crops and animals will die. People will starve. In Yellowstone, there would be no planes. Level 2 Clear (3-4 marks) Effects are clearly described, in an organised way. Statements are linked. The greatest danger would be close to the blast where 90% of people could be killed. Large numbers of people would die across the country – inhaled ash forms a cement-like mixture in human lungs. Buildings would collapse with this area due to the weight of the ash. This would ground planes and make road transport difficult. Livestock would die as they would choke in hot ash. In the USA up to ¾ of the country would be affected in some way if Yellowstone erupted. 6 of 19 MARK SCHEME – Level 1/2 Certificate in Geography – 8031/1 – June 2014 1(c)(i) The earthquake causing the tsunami took place immediately offshore, so arrived quickly (1) or the strength of the earthquake was so strong that the immediate effects were devastating (1). The area affected extended a considerable distance inland (1) (1 mark) AO2 – 1 1(c)(ii) Figure 3 shows the movement of plates and the type of plate material. Answers should indicate convergence of plates, subduction of oceanic crust beneath continental crust, triggering a major earthquake. This submarine earthquake displaced the sea bed, causing a massive tsunami to occur. Allow idea of 3 plates moving at different speeds and directions, causing friction, causing an earthquake which triggers a tsunami. (4 marks) AO1 – 2 AO2 – 1 AO3 – 1 Level 1 (Basic) 1-2 marks Simple points about plate movement and/or the link between earthquakes and tsunamis. Sequence of events likely to be incomplete or random points. There may be little or no use of Figure 3. The plates moved towards each other. The ocean plate moved under the continental plate. The friction caused an earthquake. The sea bed rose and a huge wave formed. Level 2 (Clear) 3-4 marks Linked statements giving a clear explanation of the tsunami, making use of the source. Explanations likely to be organised, in sequence and clearly expressed. The denser Pacific Plate moves towards the Eurasian Plate and is subducted into the mantle. Friction between the two plates sometimes builds up and is then released as a sudden jerk or earthquake. The sudden movement displaces the sea bed, causing a massive wave or tsunami to form. 7 of 19 MARK SCHEME – Level 1/2 Certificate in Geography – 8031/1 – June 2014 1(d) The question refers to a tectonic landscape so allow reference to areas with fold mountains and/or volcanoes. Emphasis is on economic opportunities so these might include the possibilities of geothermal power in volcanic areas, hydroelectric power in areas with fold mountains, mining activities, tourism, agriculture (on fertile soils in volcanic regions), forestry etc. Expect reference to a named case study for Levels 2 and 3. (8 marks) AO1 – 5 AO2 – 3 Farming is a primary activity in all of the fold mountain ranges around the world. Mainly, due to the height and steepness of many of the slopes, this is restricted to cattle and sheep farming. However, in the foothills of the Himalayas, the Nepalese people use terraces in the mountainside to help them grow crops, and some southern facing Alpine slopes are used for vines and fruits. In the Andes, reference to the growing of subsistence crops, such as potatoes on terraces – steps made to create flat areas. Most crops are grown in lower parts of valleys, including some cash crops such as cotton. Llamas are used as pack animals – the males, whilst the females are used for meat. Milk and wool are used for clothes and rugs. HEP – steep, narrow valley are suitable for construction of dams and steep relief gives fast flowing water needed to turn the turbines. Peru has a number of schemes, including Yuncan project and El Platinal project that is under construction. Mining – the Andes is rich in minerals – tin, nickel, silver and gold are all present. Yanacocha gold mine in Peru is the largest in the world and has led to the expansion of the town of Cajamarca from 30 000 to 240 000 inhabitants. Tourism – the main tourist attraction in the Rockies and the Alps is skiing. Hundreds of thousands of people ski each year and this has brought great changes and problems to the main areas. The increase in tourism has meant much-improved infrastructure, a huge increase in hotels and restaurants and the development of entire resorts. It has brought a large amount of much needed money into these areas and allowed local people to diversify from farming into many other jobs. 8 of 19 MARK SCHEME – Level 1/2 Certificate in Geography – 8031/1 – June 2014 Level 1 Basic (1-4 marks) Describes use(s) of fold mountains or volcanic areas. Statements are general in a random order. No case study or just a name given. There are large dams and lakes, producing HEP. Cattle are kept in the mountains. Big areas are used for mining. Dramatic scenery created by volcanic eruptions attracts tourists. This brings income to an area. Level 2 Clear (5-6 marks) Describes uses (at least two) of fold mountains clearly. Statements are linked. Connection with economic opportunity is clear. In Java, Indonesia, the lava and ash deposited during an eruption broke down to provide valuable nutrients for the soil. This creates very fertile soil which is good for agriculture. Sulphur is mined in some active volcanoes, made into fertilisers. The high level of heat and activity inside the Earth, close to a volcano, can provide opportunities for generating geothermal energy, such as in New Zealand. The landscape is attractive to tourists, who also like the hot springs. There are many resources of gold, silver and tin in the Andes. This is blasted out, and the sale of metals abroad helps to keep thousands of people employed. The walkers/skiers show the area is important for tourism. In the Andes, there are a number of long walks like the Inca Trail where people can view the spectacular mountains. The money brought in by foreign tourists helps the economy Level 3 Detailed (7-8 marks) Describes two or more uses of fold mountains or volcanic areas. Statements are logically ordered and linked. Detailed reference to specific case study. Steam from high-temperature geothermal fluids in Iceland is used to drive turbines and generate electrical power, while lower temperature fluids provide hot water for housing, heat for greenhouses and industrial uses, and hot or warm springs at resort spas. Geothermal heat warms more than 70 per cent of the homes in Iceland. In addition to being an energy resource, some geo-thermal waters also contain sulphur, gold, silver, and mercury that can be recovered after the electricity is produced. In Reykjavik there are swimming pools which are heated by geothermal sources. The famous Blue Lagoon is popular with tourists. There are also many geothermally heated greenhouses including some at Hveragerdi. These activities help to create employment and help to supply Iceland with essential raw materials, food and power. There are many resources of gold, silver and tin in the Andes. The Yanacocha gold mine is opencast. This led to the rapid increase of population and wealth in the nearby town of Cajamarca. The Inca Trail in Peru attracts many walkers. This is a long distance hike of 45km and ends in the historic settlement of Machu Picchu, which is the ‘Lost City of the Incas’. For many Peruvians there are opportunities to earn money as tour guides, hoteliers and restaurant owners. 9 of 19 MARK SCHEME – Level 1/2 Certificate in Geography – 8031/1 – June 2014 Ecosystems and Global Environments 2(a)(i) 1 x 2 or 2 x 1 Credit description only. Vegetation consists of tall (Saguaro) cacti (1) with spiky, fine needles (1). The one on the picture has seven small branches coming off it (1). (2 marks) AO2 – 1 AO3 – 1 Other vegetation grows quite low and does not cover the whole area (1). Some plants have small spiky leaves (1). 2(a)(ii) Evidence of plant’s ability to withstand large periods of drought and/or the alkaline/salty conditions of many desert soils. Level 1 (Basic) 1-2 marks Simple statements with limited explanation of how plants are able to live for long periods without water. (4 marks) AO1 – 2 AO2 – 1 AO3 – 1 They have very strong seeds which remain dormant until it rains. They have thorns which help to reduce water loss. Some have very deep roots so they can get down to underground water. A cactus can store water in its stem. Some plants store water in root bulbs. Level 2 (Clear) 3-4 marks Linked statements showing how the plant is adapted to long periods of drought or survive in conditions of alkaline soils. The answer may refer to general adaptations or can be specific to particular plants. Creosote bushes are very hardy and can tolerate soils that are very alkaline. They are spaced wide apart as each plant has shallow widespread roots so they can get water even if there is just a light shower that only wets the surface. The Saguaro cactus has tiny thorns instead of leaves – so it doesn’t get eaten, and to prevent moisture loss. The stem is green for photosynthesis and the concertina folds swell up to store water after rain. The roots are long to get underground water stored deep underground. 10 of 19 MARK SCHEME – Level 1/2 Certificate in Geography – 8031/1 – June 2014 2(b)(i) 2 x 1 or 1 x 2 Producers are organisms that produce their own food. They take energy from the sun and make it into chemical energy (food) by the process of photosynthesis. They are at the bottom of the food chain and may be eaten by consumers. They provide nutrients for the rest of the food chain. They supply energy to primary consumers. (2 marks) AO2 – 1 AO3 – 1 2(b)(ii) The entire organism is not consumed or digested (1). Parts such as roots, woody stems, bones, scales, feathers, etc., aren’t eaten (1). Energy is used up by organisms in each topic level for movement and transport inside their bodies (1). Energy is used in respiration and is released from the body of the organism as heat (1). Energy becomes lost in excretion (1). (1 mark) AO1 – 1 2(b)(iii) When a top predator is no longer present, herbivore populations increase rapidly (1). Without a top predator to regulate their numbers, these animals put a great deal of pressure on the existing vegetation that they require for food and can destroy large amounts of plant life, such as grasses and trees(1). This then causes further problems, such as soil erosion and loss of animal habitat (1).There may be a reduced number of producers (1) (2 marks) AO1 – 2 2(c)(i) Emphasis is on contrasts between the two ecosystems. Credit references to latitude/limits, names of continents/regions. Tropical forests mainly between 10 degrees N and S of Equator, temperate forests vary between 40 and 60 degrees in Europe but much further south in North America and Asia. They are mainly in the Northern Hemisphere. (4 marks) AO2 – 2 AO3 – 2 Level 1 (Basic) 1-2 marks Simple points, perhaps random statements. No clear contrast/two separate accounts. Tropical forests are located in Africa, South America and Asia. TRFs are found close to the equator. Deciduous forests are in western Europe. Temp deciduous forests are found between 40 and 60 degrees north. Level 2 (Clear) 3-4 marks Clear contrasts between the two distributions. Linked statements. Credit latitude references, names of continents, regions, etc. The tropical rainforests are mainly found close the equator but temperate deciduous forests have a much wider distribution, up to 60 degrees north in Europe, but closer to the tropic in Asia. TRFs are found in equatorial Africa, Amazonia in South America and SE Asia whereas temperate deciduous forests are found in eastern North America, Europe and East Asia. 11 of 19 MARK SCHEME – Level 1/2 Certificate in Geography – 8031/1 – June 2014 2(c)(ii) Soils of tropical rainforests tend to be infertile with a hard laterite layer or crust is left exposed (1). By contrast the soils associated with deciduous forests tend to be fertile brown earths, and ideal for growing arable crops (1). Allow 2 separate statements if contrasts are evident. (2 marks) AO1 – 2 2(d) The management strategies should be appropriate to the case study chosen and contribute to the sustainability of the forest in order to provide for future generation by ensuring that the environment is not harmed. Max L1 if case study is based on tropical forest. (8 marks) AO1 – 5 AO2 – 3 Level 1 (Basic) 1-4 marks Simple list of management strategies with no named case study. They can repair footpaths. They can fence off damaged areas. They can zone the forest. They can provide car parks. Level 2 (Clear) 5-6 marks Linked statements with some description of management strategies which are appropriate to the named case study. Limited reference to sustainability. In Epping Forest they are providing car parks for visitors. They are fencing off areas where there is damage. This ensures that the trees are allowed to recover and damage is restricted. They are providing pony trails. Pollarding has been introduced which helps to conserve the forest but prevents the trees becoming too big. Level 3 (Detailed) 7-8 marks Specific case study information, focusing on the strategies and assessment of sustainability. In the National Forest in the East Midlands there is a network of country lanes, walks and cycle trails to provide the needs of walkers, cyclists and horse riders, ensuing that the other parts of the forest are not damaged by these people. 4000 jobs have been provided to provide for the needs of the people visiting the forest. There is a family visitor attraction built near Ashby de la Zouch with nearby craft workshops where people can buy locally made products. In Epping Forest by providing car parks they encourage the use of the forest for recreation but stop cars going to areas where they may cause damage to verges. Letting old trees die and collapse means they rot and provide habitat for many small animals and insects. Pollarding means that trees are restricted to a manageable size but continue providing timber over a long period of time. 12 of 19 MARK SCHEME – Level 1/2 Certificate in Geography – 8031/1 – June 2014 River Processes and Pressures 3(a)(i) Effects - 2, 5 Responses -1, 4 Both statements have to be correct. 3(a)(ii) Must link to economic implications. Damage to crops and grazing areas will affect the economy because the farmers will receive less money and possibly go out of business (1). The closure of roads and railways means that people can’t get to work or reach shops, which would affect many businesses (1). (1 mark) AO2 – 1 3(a)(iii) Lack of vegetation would mean less interception of water/surface runoff would increase, with a higher risk of flooding (1). (2 marks) AO1 – 1 AO2 – 1 Urban areas have concrete surfaces, so water doesn’t infiltrate/stays on the surface, and flood risk increases (1). (2 marks) AO2 – 1 AO3 – 1 13 of 19 MARK SCHEME – Level 1/2 Certificate in Geography – 8031/1 – June 2014 3(a)(iv) Advantages of hard engineering include the effectiveness of dams holding back water to control flooding. Many dams and reservoirs are multipurpose projects and so there are other advantages such as HEP and water supply. This approach means that something is being done to control flooding and that people’s lives and their property should be safe. It means that people do not have to live in fear of flooding or face the consequences of cleaning up or losing family and friends. It is more immediate than strategies like planting trees that take a long time to grow. (4 marks) AO1 – 3 AO2 – 1 Disadvantages include the high cost of installation, the possible loss of land and disruption to local communities (dam construction), the need to replace structures after a relatively short period, continuous maintenance, visually ugly, etc. Credit examples where relevant. Level 1 (Basic) 1-2 marks Simple statements perhaps focusing on either advantages or disadvantages. Max L1 for generic comment and/or description of coastal engineering methods. Dams can hold back the water and stop flooding. Embankments keep the water in the channel. Straightening the channel means the river moves downstream faster and stops water building up. Dams are costly to build. People may have to move when a dam is built. Level 2 (Clear) 3-4 marks Linked statements describing the advantage(s) and disadvantage(s) of hard engineering. Allow L2 max for one advantage and one disadvantage clearly described. The advantages of hard engineering are that the methods are immediately effective at controlling flooding. The water is held back by a dam or contained in the channel by embankments. If the river is straightened, the water moves quickly downstream because the slope is steeper, and the risk of flooding is reduced. If a dam is built the scheme can be used for many things, such as hydroelectric power, irrigation, tourism and water supply. Disadvantages include the fact that many dam and reservoir schemes cost huge amounts of money and may flood valuable farmland or even settlements. After a while sediment builds up in reservoirs and may have to be dredged. 14 of 19 MARK SCHEME – Level 1/2 Certificate in Geography – 8031/1 – June 2014 3(b)(i) The size of sediment becomes smaller (1). The shape becomes more rounded/less angular (1). (2 marks) AO3 – 2 3(b)(ii) 1 x 2 or 2 x 1 (2 marks) AO1 – 1 AO2 – 1 Rivers increase in width and depth because more tributaries join the main river, adding to the discharge and size of channel. More water joins by groundwater flow and surface runoff from the drainage basin, adding to the size of the channel. Lateral and/or vertical erosion may widen/deepen the channel. 3(b)(iii) Methods of transport include traction (the rolling of larger particles along the base of the channel), saltation (bouncing of medium sized particles), suspension (fine particles carried in the water) and solution (dissolved material). These methods may vary in importance downstream with traction and saltation more important nearer the source. (4 marks) AO1 – 3 AO2 – 1 Level 1 (Basic) 1-2 marks Simple points about types of transport. Random definitions and short descriptions of processes. Rivers transport their load by rolling large rocks along the channel. Some fine sediment is carried along in the water. Traction is more important in the upper course. Level 2 (Clear) 3-4 marks Clear linked statements describing the various ways rivers transport their load. Refers to differences in methods of transport at different stages of the river’s course. Rivers carry their load in different ways. Heavier materials such as pebbles and boulders are transported in flood by rolling along the bed of the channel. Medium sized sand and gravel particles bounce along the channel by a process called saltation. Finer sediment is carried along in the water in suspension. The traction and saltation load is more prominent upstream as the particles tend to be larger. 15 of 19 MARK SCHEME – Level 1/2 Certificate in Geography – 8031/1 – June 2014 3(c) The photograph shows a range of landforms including meanders, oxbow lakes and floodplains. Allow reference to levees although less clear on the image. Sequence and process should be integrated in explanation of specific landforms. (8 marks) AO1 – 4 AO2 – 2 AO3 – 2 Level 1 ( Basic) 1-4 marks Simple statements about individual landforms. Sequence may be incomplete or mixed up. Limited or no coverage of process. The river meanders and makes the flood plain wider. A slip-off slope and river cliff are formed by erosion and deposition. The river breaks through and makes a straight channel, and leaves a lake behind. Level 2 (Clear) 5-6 marks More than one landform described, with some explanation of sequence and process. When the river floods the silt builds up on the flood plain to form a floodplain. A river cliff is formed by erosion on the outer bend of a meander; this is where the water is deeper and moves quickly. The slip-off slope is formed on the inside bend by deposition as this is where the river is shallow and flows slowly. Oxbow lakes form from a meander. Erosion takes place on the outside bend, the neck narrows, the river breaks through, and deposition seals oxbow lake. Level 3 (Detailed) 7-8 marks Process and sequence effectively integrated. More than one landform fully explained with full sequence of changes Meanders are formed where there are shallow and deep sections in the river channel (called riffles and pools) Gradually the meander increases in size as the outer bend is eroded quickly, by processes of abrasion and hydraulic power. The outer bend is usually much deeper than the inside bend or slip-off slope where water travels slowly and deposition may take place. Erosion occurs on the outside bend especially by hydraulic power, e.g. along the River Mississippi. Deposition takes place on inside bends where water is shallower and there is lower velocity. Eventually the lake dries out to form meander scar. The enlargement of the meander wears away the valley floor to widen the valley, and the meanders migrate downstream making a continuous area of fairly flat land called a floodplain. 16 of 19 MARK SCHEME – Level 1/2 Certificate in Geography – 8031/1 – June 2014 Coastal Processes and Pressures 4(a)(i) Beach nourishment/reseeding/replenishment/recycling. 4(a)(ii) 1x2 It is necessary to keep adding sand to the beach which can be expensive (2). The beach material can be washed away in a single severe storm, so it may not be effective for long (2). 4(b)(i) Answers should refer to the trapping of beach material being carried by longshore drift. Gradually the beach becomes wider and this acts as a buffer or barrier to wave attack. The cliffs are protected from erosion. (1 mark) AO2 – 1 (2 marks) AO1 – 1 AO2 – 1 (4 marks) AO1 – 1 AO2 – 2 AO3 – 1 Level 1 (Basic) 1-2 marks Simple statements, with an incomplete explanation. Random points. Groynes trap sand and shingle. A wide beach protects the cliffs. Level 2 (Clear) 3-4 marks Linked statements showing an understanding of the effectiveness of groynes in protecting the cliffs. Complete sequence. Wooden or concrete groynes are built at right angles to the coast. These help to trap beach debris which builds up on one side, depending on the direction of longshore drift. Gradually the beach becomes wider and this becomes a barrier to wave attack. The cliffs are protected from further erosion by the waves. 4(b)(ii) Accept any valid method. Seawall/gabions/tetrapods/revetment, etc. (1 mark) AO1 – 1 4(c)(i) Freeze thaw, accept salt crystallization, wetting and drying. (1 mark) AO1 – 1 4(c)(ii) Likely to be slumping or sliding. Rotational slumping occurs where soil and loose rock (1) moves down slope along a curved surface (1), leaving an exposed cliff face below the head of the slump, and producing a mass of debris at the base (1). (2 marks) AO1 – 2 17 of 19 MARK SCHEME – Level 1/2 Certificate in Geography – 8031/1 – June 2014 4(d)(i) 2x1 Vegetation increases inland (1). Vegetation becomes taller (1) and more diverse inland (1). Grasses are replaced by shrubs and eventually trees (1). The number of species becomes greater and vegetation becomes more complex (1). Where dune slacks form at a level below the water table, water loving plants such as willow colonise the dune (1). 4(d)(ii) A range of strategies might be introduced. These might include (for sand dunes): • Vulnerable areas and areas recently planted with marram grass (used to stabilise the dunes) can be fenced off to limit access and damage. (2 marks) AO3 – 2 (4 marks) AO1 – 2 AO2 – 2 • Boardwalks are laid through the dunes to focus tourists onto specific paths. • Car parks are provided and people are not permitted to drive onto the beach. • Fire beaters can be positioned within the dune area in case of a fire. • Facilities including a shop, café, toilets and litter bins are provided near the car parks to focus tourists into one area. • Information boards educate visitors about the environment and how they can help to protect it. Level 1 (Basic) 1-2 marks Strategy(ies) identified with brief description at most. Credit reference to case studies although this is not essential. Marram grass is planted. Areas can be fenced off. Wooden paths or boardwalks are built though the dunes. Level 2 (Clear) 3-4 marks Two or more strategies. Credit strategies applicable to one type of habitat only. Strategies are fully described using linked statements. Shows how the methods work to help conservation of coastal habitats. Case studies can be credited but are not essential. Dune stabilisation is planting vegetation such as marram grass on the dunes. By planting vegetation dunes are made more stable (roots) and the moisture content is maintained. Some areas can be fenced off so that people don’t have access. This means that the vegetation grows without interruption. Keyhaven Saltmarshes have been designated as a SSSI (Site of Special Scientific Interest) and part of a National Nature Reserve. This is to protect the biodiversity and plants of the area and so the area is carefully monitored and managed to help maintain this mix of plants. A shoreline management plan was put in place to add shingle to the spit, and 550m of rock armour at the western end of the spit. It is hoped that this will stabilise the salt marsh. 18 of 19 MARK SCHEME – Level 1/2 Certificate in Geography – 8031/1 – June 2014 4(e) There should be recognition of the formation of headlands and bays over time, based on differences in rock type. Other landforms shown in the sketch maps include wave cut platforms, beaches and stacks. Accept comments about wave refraction and eventual straightening of the coast. (8 marks) AO1 – 4 AO2 – 2 AO3 – 2 Level 1 (Basic) 1-4 marks Description of changing shape of coast with simple statements about formation of headlands and bays. Hard rock is eroded slowly. Soft rock erodes fast. Headlands stick out into the sea. Bays with beaches form between headlands. Over time wave cut platforms and stacks develop at the headlands. Level 2 (Clear) 5-6 marks Description of changes and explanation of why the changes occur. Processes and sequence integrated. Some recognition of how other landforms are created. Where there are differences in rock structure at an angle to the coast, headlands and bays may form. This is because the harder more resistant rock is eroded more slowly than the softer rock. Eventually the headlands are more exposed to wave attack and erosional landforms develop, including wave cut platforms as the cliffs retreat. Beaches may form in the bays. Level 3 (Detailed) 7-8 marks Full description of differential erosion and the formation of headlands and bays. Complete sequence and explanation of process. Credit specific processes if made relevant to the answer - hydraulic action, corrosion, etc. Explanation of the formation of other landforms - wavecut platforms, stacks and beaches. May refer to discordant coastlines and wave refraction. May reach top of level 3 with reference to 2 or more landforms. Because of differences in resistance of rocks to erosion, some parts of the coast may retreat faster than others. This will happen where the rocks are at right angles to the coastline (a discordant coast). Over thousands of years the softer less resistant rock will be eroded more quickly than the harder more resistant rock and differences become more pronounced. Eventually there will be headlands that stick out into the sea and bays where the land has been worn back. Due to wave refraction the energy of the waves is then focused on the headlands and spread out in the bays. As the cliffs wear back, a broad wave cut platform may develop and a series of caves, arches and stacks may form. 19 of 19
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