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NSW HSC 2009 : EARTH & ENVIRONMENTAL SCIENCE

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2009 H I G H E R S C H O O L C E R T I F I C AT E E X A M I N AT I O N Earth and Environmental Science Total marks 100 General Instructions Reading time 5 minutes Working time 3 hours Write using black or blue pen Draw diagrams using pencil Board-approved calculators may be used A Geological Time Scale is provided at the back of this paper Write your Centre Number and Student Number at the top of pages 9, 11, 15, 19 and 39 S ection I Pages 2 22 75 marks This section has two parts, Part A and Part B Part A 15 marks Attempt Questions 1 15 Allow about 30 minutes for this part Part B 60 marks Attempt Questions 16 27 Allow about 1 hour and 45 minutes for this part S ection II Pages 23 35 25 marks Attempt ONE question from Questions 28 31 Allow about 45 minutes for this section 139 Section I 75 marks Part A 15 marks Attempt Questions 1 15 Allow about 30 minutes for this part Use the multiple-choice answer sheet for Questions 1 15. 1 The diagram shows two continents with several geological features and a plate boundary. N Continent B Key Mid-ocean ridge Extinct Tertiary volcano Continent A Permian coal basin What geological setting is shown in the diagram? (A) Divergent boundary with Continents A and B moving apart (B) Transform fault with Continents A and B moving closer together (C) East-west conservative boundary with Continents A and B moving apart (D) North-south convergent boundary with Continent A moving south and Continent B moving north 2 Which material from large explosive volcanic eruptions contributes most to a decrease in global temperatures? (A) Carbon dioxide (CO2) (B) Sulfur dioxide (SO2) (C) Water vapour (H2O) (D) Radon (Rn) 2 3 The table summarises some features of hazards associated with volcanic activity. Hazard Features Lahar A fast moving mixture of hot water and volcanic debris that travels along topographic depressions. Acid rain Acid rain is produced by rain water falling through volcanic emissions. It can be as corrosive as battery acid. Volcanic gases CO2 and SO2 can be released into the atmosphere during an eruption or may escape continuously into the atmosphere prior to an eruption. Which of the following is a valid inference based on the information in the table? (A) Lahars and volcanic gases have similar features. (B) Volcanic gases are only a risk during periods of active eruption. (C) The majority of deaths during an eruption are caused by acid rain. (D) Risks from lahars can be minimised if people build on topographic highs. 4 What is the plate tectonic super-cycle? (A) The cyclic pattern in the rate of motion of two plates at divergent boundaries (B) The regular cyclic motion of supercontinents around the equator (C) The ongoing cycle of formation and breakup of supercontinents (D) The recycling of lithospheric plates at convergent boundaries 3 5 Awaiting Copyright Of the points A, B, C or D marked on the map, at which location would a deep focus earthquake be most likely to occur? (A) A (B) B (C) C (D) D 6 In the fossil record, terrestrial vertebrates first appeared in the Devonian Period. What advantage did the terrestrial environment offer these vertebrates? (A) Less exposure to ultraviolet radiation (B) Greater variation in temperature (C) Less competition for resources (D) Greater variety of land plants 7 What is the best description of Ediacaran metazoans? (A) Simple single-celled organisms (B) Soft-bodied multicellular animals (C) Animals with hardened body parts (D) Primitive photosynthetic organisms 4 8 Which of the following is the likely cause of an explosive radiation of new species following a mass extinction event? (A) Increased competition between organisms (B) A significant environmental change (C) Depletion of the ozone layer (D) The mutation of DNA 9 The diagram shows two stratigraphic columns for a sedimentary basin. Column 1 Column 2 Key Brachiopod species B Trilobite species T 375 Ma Conglomerate Basalt Sandstone 380 Ma Limestone 401 Ma What is the likely age of the Brachiopod species B? (A) Between 380 Ma and 401 Ma (B) Younger than trilobite species T (C) Younger than 375 Ma (D) Older than 401 Ma 5 Siltstone 10 How do fossils provide evidence that supports the theory of evolution by natural selection? (A) They can be mapped to indicate the distribution of each species. (B) They can be analysed to interpret competition between species. (C) They can be compared to show similarities between species. (D) They can be dated to determine an absolute age. 11 Scientists study the relationship between changes in past environments and changes in fossil life forms. What do the results of these studies allow scientists to do better? (A) Implement scientific procedures (B) Predict the future life forms that will evolve (C) Implement strategies to stop environmental change (D) Predict the potential impact of environmental changes on modern life forms 12 To simulate the effect of chlorofluorocarbons (CFCs) on ozone in the atmosphere, quantities of ozone, oxygen and a CFC are placed in a sealed container which contains a source emitting ultraviolet radiation. Which of the following changes are most likely to occur after one month of exposure to ultraviolet radiation? Ozone CFC (A) Decrease Increase Decrease (B) Increase Increase Increase (C) Increase Decrease Decrease (D) 13 Oxygen Decrease Decrease Increase Why are most Australian soils less fertile than those on other continents? (A) Most Australian soils have been intensively farmed. (B) Australia s low mountains contribute to significant rainfall. (C) Most Australian soils form by the slow weathering of lateritic rocks. (D) Most of the Australian continent is geologically very old and tectonically stable. 6 14 Which of the following correctly identifies an international strategy, its purpose and its intended outcome? Strategy Purpose Intended outcome (A) Kyoto To reduce greenhouse gas emissions Reduction in UV radiation reaching Earth s surface (B) Montreal To reduce greenhouse gas emissions Reduction in global warming caused by humans (C) Kyoto To reduce production of ozone depleting chemicals Reduction in global warming caused by humans To reduce production of ozone depleting chemicals Reduction in UV radiation reaching Earth s surface (D) Montreal The graph shows the relationships between crop yield and soil salinity measured on farms in an area of NSW. 30 Crop yield (tonnes per hectare) 15 25 20 15 10 5 0 0 10 20 30 40 50 60 70 80 90 100 Soil salinity (mS/m) What is the likely crop yield in tonnes per hectare on a farm in this area of NSW, where the soil salinity is 100 mS/m? (A) 0 (B) 3 (C) 7 (D) 15 7 BLANK PAGE 8 Board of Studies NSW 2009 2 009 HIGHER SCHOOL CERTIFIC ATE EXAMINATION Earth and Environmental Science Centre Number Section I (continued) Part B 60 marks Attempt Questions 16 27 Allow about 1 hour and 45 minutes for this part Student Number Answer the questions in the spaces provided. Question 16 (5 marks) The diagram shows a section of Earth s crust. Oceanic crust Key Plate motion Mountain range X (a) Identify the structure labelled X. 1 ............................................................................................................................... (b) (i) The mountain range in the diagram forms at a plate boundary. 1 Identify the type of plate boundary. ................................................................................................................... (ii) Explain the tectonic process that leads to the formation of this type of mountain range. ................................................................................................................... ................................................................................................................... ................................................................................................................... ................................................................................................................... ................................................................................................................... ................................................................................................................... 140 9 3 Question 17 (7 marks) (a) The map shows the distribution of epicentres of large-magnitude earthquakes. Awaiting Copyright Why are earthquakes located in the pattern shown on the map? 1 ............................................................................................................................... ............................................................................................................................... (b) Identify ONE technology that can be used to predict earthquakes, and explain how it works. 3 ............................................................................................................................... ............................................................................................................................... ............................................................................................................................... ............................................................................................................................... ............................................................................................................................... ............................................................................................................................... (c) Explain ONE impact that earthquakes have on the built environment. ............................................................................................................................... ............................................................................................................................... ............................................................................................................................... ............................................................................................................................... ............................................................................................................................... ............................................................................................................................... 10 Board of Studies NSW 2009 3 2 009 HIGHER SCHOOL CERTIFIC ATE EXAMINATION Earth and Environmental Science Centre Number Section I Part B (continued) Student Number Question 18 (4 marks) Explain the role of subduction in the growth of the Australian continent. ......................................................................................................................................... ......................................................................................................................................... ......................................................................................................................................... ......................................................................................................................................... ......................................................................................................................................... ......................................................................................................................................... ......................................................................................................................................... ......................................................................................................................................... Please turn over 140a 11 4 Question 19 (5 marks) On 8 August 2008 the island arc volcano Kasatochi erupted explosively producing large amounts of sulfur dioxide (SO2), carbon dioxide (CO2), water vapour (H2O) and other gases. (a) Draw a labelled cross-section of the type of plate boundary that could produce a volcano such as Kasatochi. Question 19 continues on page 13 12 3 Question 19 (continued) (b) The following graph shows the daily emissions of SO2 directly above the Kasatochi volcano in the period 10 17 August 2008 as measured by: GOME (Global Ozone Monitoring Experiment on board the European Remote Sensing Satellite) SCIAMACHY (an imaging spectrometer operated by the European Space Agency) OMI (the Ozone Monitoring Instrument jointly operated by the UK Meteorological Office and the National Centre for Environmental Prediction). 60 Key SO2 (tonnes per day) 50 GOME SCIAMACHY 40 OMI 30 20 10 0 10 11 12 13 14 15 16 17 August 2008 Explain why these data can be considered to be both accurate and reliable. ............................................................................................................................... ............................................................................................................................... ............................................................................................................................... ............................................................................................................................... End of Question 19 13 2 Question 20 (7 marks) (a) Identify the organisms responsible for the formation of 3.4 billion-year-old stromatolites in Australia. 1 ............................................................................................................................... (b) Account for the change in both the abundance and distribution of stromatolites over time. 3 ............................................................................................................................... ............................................................................................................................... ............................................................................................................................... ............................................................................................................................... ............................................................................................................................... ............................................................................................................................... (c) Explain the role of photosynthetic organisms in the development of the ozone layer. ............................................................................................................................... ............................................................................................................................... ............................................................................................................................... ............................................................................................................................... ............................................................................................................................... ............................................................................................................................... 14 Board of Studies NSW 2009 3 2 009 HIGHER SCHOOL CERTIFIC ATE EXAMINATION Earth and Environmental Science Centre Number Section I Part B (continued) Student Number Question 21 (6 marks) (a) Outline TWO features of land plants that have enabled them to survive in terrestrial environments. 2 ............................................................................................................................... ............................................................................................................................... ............................................................................................................................... ............................................................................................................................... (b) Why have reptiles been more successful than amphibians in exploiting terrestrial environments? ............................................................................................................................... ............................................................................................................................... ............................................................................................................................... ............................................................................................................................... ............................................................................................................................... ............................................................................................................................... ............................................................................................................................... ............................................................................................................................... 141 15 4 Question 22 (3 marks) (a) Identify ONE feature of Early Phanerozoic organisms that Late Proterozoic organisms did not have. 1 ............................................................................................................................... (b) Describe an advantage the feature gave to the Early Phanerozoic organisms. 2 ............................................................................................................................... ............................................................................................................................... ............................................................................................................................... ............................................................................................................................... Question 23 (4 marks) Assess a practice for managing agricultural pests that is an alternative to the use of pesticides. ......................................................................................................................................... ......................................................................................................................................... ......................................................................................................................................... ......................................................................................................................................... ......................................................................................................................................... ......................................................................................................................................... ......................................................................................................................................... ......................................................................................................................................... 16 4 Question 24 (4 marks) The diagram shows a flowchart for the treatment of sewage. Raw Sewage Screening X Large Solids Sludge Landfill Composting Aerobic Bacteria X Methane Digestion Sludge Fertiliser Y Discharge to a river (a) Process X appears twice in this flowchart. What is process X? 1 ............................................................................................................................... (b) (i) Identify a process that could be used at Y. 1 ................................................................................................................... (ii) Justify the use of the process you identified in part (b) (i). ................................................................................................................... ................................................................................................................... ................................................................................................................... ................................................................................................................... 17 2 BLANK PAGE 18 Board of Studies NSW 2009 2 009 HIGHER SCHOOL CERTIFIC ATE EXAMINATION Earth and Environmental Science Centre Number Section I Part B (continued) Student Number Question 25 (4 marks) Name TWO methods that could be used to rehabilitate a contaminated mine site. Justify your choice of these methods. ......................................................................................................................................... ......................................................................................................................................... ......................................................................................................................................... ......................................................................................................................................... ......................................................................................................................................... ......................................................................................................................................... ......................................................................................................................................... ......................................................................................................................................... Please turn over 142 19 4 Question 26 (4 marks) The data in Graphs A and B were obtained from the same pasture land in NSW. Graph A shows soil depth, soil moisture and number of sheep per hectare (ha). Graph A Soil moisture (kg/kg soil) 0.25 Key 0 sheep per ha 15 sheep per ha 20 sheep per ha 0.2 0.15 0.1 Stocking rates & soil moisture content of pasture land, New South Wales State of Environment, 1997. Reproduced with permission by the NSW Environmental Protection Authority. 0.05 0 5 10 15 20 25 Soil depth (cm) Graph B shows soil moisture and erosion rates for two paddocks, one which had been grazed by sheep and a second left ungrazed. Graph B Soil erosion rate (kg/ha) 14 Key Grazed pasture 12 Ungrazed pasture 10 8 6 4 2 0 0 0.1 0.2 0.3 0.4 Soil moisture (kg/kg soil) Question 26 continues on page 21 20 Question 26 (continued) (a) Using information in Graph A, identify the relationship between soil moisture and the number of sheep per hectare. 1 ............................................................................................................................... ............................................................................................................................... ............................................................................................................................... (b) Using information from both graphs, justify a strategy to reduce the rate of soil erosion on a sheep farm. ............................................................................................................................... ............................................................................................................................... ............................................................................................................................... ............................................................................................................................... ............................................................................................................................... ............................................................................................................................... End of Question 26 21 3 Question 27 (7 marks) Analyse how features of the Australian environment and the unsustainable use of resources have contributed to the extinction of organisms since the arrival of humans in Australia. ......................................................................................................................................... ......................................................................................................................................... ......................................................................................................................................... ......................................................................................................................................... ......................................................................................................................................... ......................................................................................................................................... ......................................................................................................................................... ......................................................................................................................................... ......................................................................................................................................... ......................................................................................................................................... ......................................................................................................................................... ......................................................................................................................................... ......................................................................................................................................... ......................................................................................................................................... ......................................................................................................................................... ......................................................................................................................................... ......................................................................................................................................... ......................................................................................................................................... ......................................................................................................................................... ......................................................................................................................................... ......................................................................................................................................... 22 Board of Studies NSW 2009 7 2 009 HIGHER SCHOOL CERTIFIC ATE EXAMINATION Earth and Environmental Science Section II 25 marks Attempt ONE question from Questions 28 31 Allow about 45 minutes for this section Answer the question in a writing booklet. Extra writing booklets are available. Pages Question 28 Question 29 Organic Geology a Non-renewable Resource .................. 27 29 Question 30 Mining and the Australian Environment .............................. 30 32 Question 31 143 Introduced Species and the Australian Environment ........... 24 26 Oceanography ...................................................................... 33 35 23 Question 28 Introduced Species and the Australian Environment (25 marks) (a) (i) 1 Name an introduced plant that has become a pest in Australia. For the plant named in part (a) (i): (ii) 1 (iii) Outline how it was able to disperse within the Australian environment. 1 (iv) (b) Identify ONE reason why it was introduced into Australia. Identify ONE strategy that can be used to control it. 1 One control program for pests such as the European Red Fox is to use poison baits. This method involves attracting the pest with fresh feeds (for example pieces of meat) followed by the poison baits (for example pieces of meat with poison) several days later. (i) 1 Identify a potential risk of the use of this control program. The table gives data for one control program in a bushland reserve in a Sydney suburb. Fresh feeds laid Fresh feeds taken Poison baits laid Poison baits taken April 2005 31 20 0 September 2005 55 50 24 21 April 2006 22 1 20 0 September 2006 12 7 24 10 September 2007 0 20 3 September 2008 0 13 1 Date (ii) Using the data in the table, evaluate the effectiveness of the control program. Question 28 continues on page 25 24 3 Question 28 (continued) (c) Outline TWO criteria used to determine the conditions under which an organism can be used for biological control. 2 (ii) (d) (i) Compare the use of bacterial/viral parasites with the release of sterilised males as biological controls. 2 The table gives information for an introduced plant species. Average soil phosphorus level (ppm) Numbers of an introduced plant species per 100 m2 15 20 25 30 35 40 45 5 7 21 32 40 56 59 (i) Identify the independent variable in the table. 1 (ii) Detach the graph paper on page 39. Plot the information given in the table onto the graph paper. 3 Question 28 continues on page 26 25 Question 28 (continued) (e) The graph shows the relationship between average daily temperature and the percentage of seeds germinating. 30 Percentage of native plant seeds germinating 25 20 15 10 5 0 10 20 30 40 Average daily air temperature ( C) 50 60 Analyse the trend in the graph. (f) 3 Analyse the impact that species introduced into Australia, apart from humans, have had on the biotic and abiotic components of the Australian environment. Use examples in your answer. 6 End of Question 28 26 Question 29 Organic Geology a Non-renewable Resource (25 marks) Name ONE coal-producing locality. 1 What is the element that is the most abundant by mass in fossil fuels? 1 (iii) What property of crude oil allows it to be separated into its various fractions during distillation? 1 (iv) (b) (i) (ii) (a) Identify ONE product of burning fossil fuels that is not a gas. 1 The table shows world energy usage in terawatts (TW = 1012 watts) from 1965 to 2005, and gives projected world energy usage for 2025 and 2055. Year Oil (TW) Coal (TW) Gas (TW) Other Energy Sources (TW) 1965 2.0 2.0 0.8 0.1 1975 3.5 2.2 1.5 0.2 1985 3.7 2.7 2.0 0.4 1995 4.3 3.0 2.5 0.6 2005 5.0 3.8 3.3 0.9 2025 4.0 3.8 3.8 2.1 2055 1.5 3.9 4.3 4.4 (i) Using information in the table, predict ONE economic effect of projected world energy usage. 1 (ii) Justify the use of ONE other energy source in meeting future world energy demand. 3 Question 29 continues on page 28 27 Question 29 (continued) (c) What is catalytic cracking in petroleum refining? 1 (ii) (d) (i) Outline the maturation of petroleum including diagenesis, catagenesis and metagenesis. 3 The table shows the percentage of carbon in some fossil fuels and the amount of carbon dioxide produced during combustion. Carbon in fuel (%) Carbon dioxide production during combustion (g CO2 /100 g fuel) 10 25 35 50 70 85 95 5 15 17 24 30 43 50 (i) Identify the independent variable in the table. 1 (ii) Detach the graph paper on page 39. Plot the information given in the table onto the graph paper. 3 Question 29 continues on page 29 28 Question 29 (continued) (e) The graph shows the relationship between depth and rock density in a coal basin. 0 10 20 Depth below surface (m) 30 40 50 60 70 80 90 100 110 120 0 0.5 1.0 1.5 2.0 Density of rock (g/cc) 2.5 3.0 Analyse the trend in the graph. (f) 3 Analyse how the geology of both coal deposits and petroleum accumulations influences exploration techniques for these resources. 6 End of Question 29 29 Question 30 Mining and the Australian Environment (25 marks) (a) Identify ONE landmark decision of the High Court of Australia which has had an impact on mining operations in Australia. 1 (ii) Identify ONE effect of the decision identified in part (a) (i) on the exploitation of a mineral deposit. 1 (iii) Give an example of a base metal. 1 (iv) (b) (i) What is ONE renewable resource? 1 The table gives details of some major mineral provinces in Australia. Resource in the Province Iron Nickel Silver, lead, zinc Copper, gold Titanium Current reserves (Mt) Current ore production (Mt per year) 1400 600 15 480 400 100 30 2 30 4 (i) 1 (ii) (c) Using information in the table, predict which resource will last the longest. For ONE mineral province in Australia, describe ONE model of mineral genesis responsible for mineralisation that is found there. 3 (i) Outline ONE exploration method that was significant in the discovery of a named ore deposit. 1 (ii) Assess the extent to which the provision of infrastructure has had an impact on the feasibility of mining the ore deposit in part (c) (i). 3 Question 30 continues on page 31 30 Question 30 (continued) (d) The table gives information for ore grade and magnetic intensity of the ore. Grade of ore (% copper) Magnetic intensity of the ore (gamma) 0 5 10 15 20 25 30 60 72 76 90 100 106 118 (i) Identify the independent variable in the table. 1 (ii) Detach the graph paper on page 39. Plot the information given in the table onto the graph paper. 3 Question 30 continues on page 32 31 Question 30 (continued) (e) The graph shows the relationship between ore grade and depth below the surface. 0 Depth below surface (m) 20 40 60 80 100 120 0 2 4 6 8 Grade of ore (% copper) 10 12 Account for the trend in the graph. (f) 3 Evaluate the sustainability of mining in Australia in terms of environmental impact and resource limitations. 6 End of Question 30 32 Question 31 Oceanography (25 marks) What is the average value of the salinity of modern oceans? 1 Outline ONE process that contributes to the salinity of oceans. 1 (iii) Identify ONE possible origin of Earth s oceanic water. 1 (iv) Identify ONE region of the crust where new ocean basins are forming. 1 The map shows mass water movement in the Pacific Ocean, Indian Ocean and Atlantic Ocean. Co ld Wa rm (b) (i) (ii) (a) Awaiting Copyright Warm Cold What is ONE consequence of using ocean sewage outlets in northern Australia? (c) 2 How has an increased understanding of oceans changed society s use of ONE ocean resource? 2 Question 31 continues on page 34 33 Question 31 (continued) (d) (i) Describe how ONE of the following technologies provides information about the oceans: 2 Echo sounder Core sampler Bathythermograph Magnetometer (ii) (e) Why should we develop new technologies to study the oceans? 2 The table gives information for water temperature and the mass of sodium chloride dissolved in water. Mass of sodium chloride dissolved in water (g) Water temperature ( C) 5 10 15 20 25 30 2 3 8 13 14 17 (i) Identify the independent variable in the table. 1 (ii) Detach the graph paper on page 39. Plot the information given in the table onto the graph paper. 3 Question 31 continues on page 35 34 Question 31 (continued) (f) The graph shows the relationship between temperature and depth below the ocean surface. 0 Depth below ocean surface (m) 10 20 30 40 50 60 0 5 10 15 Temperature ( C) 20 25 Analyse the trend in the graph. (g) 3 Analyse the role of physical conditions, including availability of light at different depths in the oceans, in determining the distribution of marine communities and the types of sediments found on the ocean floor. 6 End of Paper 35 BLANK PAGE 36 BLANK PAGE 37 Geological Time Scale EON ERA PERIOD EPOCH Holocene 0 Quaternary 2 Pleistocene Pliocene 5 Cenozoic 10 20 30 Miocene Tertiary Oligocene 40 70 Palaeocene Mesozoic Ma BP 60 Phanerozoic Eocene 50 100 200 Palaeozoic 300 400 500 1000 2000 Jurassic Triassic Permian Carboniferous Devonian Silurian Ordovician Cambrian Ediacaran Proterozoic 600 Cretaceous 3000 Archaean 4000 Hadean 38 Board of Studies NSW 2009 2 009 HIGHER SCHOOL CERTIFIC ATE EXAMINATION Earth and Environmental Science Centre Number Student Number This page is to be detached, completed and attached to the inside front cover of your writing booklet for the option question you have completed. Question attempted 144 39 BLANK PAGE 40 Board of Studies NSW 2009

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Additional Info : New South Wales Higher School Certificate Earth And Environmental Science 2009
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