2010 HSC Senior Science Marking Guidelines

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1 00 HSC Senior Science Marking Guidelines Section I, Part A Question Answer D B C 4 B 5 D 6 A 7 B 8 A 9 A and D 0 D B C B 4 C 5 A 6 A 7 C 8 A 9 C 0 C

2 00 HSC Senior Science Marking Guidelines Section I, Part B Question (a) Shows how properties of colloids and suspensions are different Lists properties of colloids AND/ suspensions Question (b) Names the mixture as a colloid Question (c) Provides ONE advantage of mayonnaise being a colloid Question (a) Identifies the feature that ph measures Question (b) Correctly identifies a way of measuring ph in a school laboratory

3 00 HSC Senior Science Marking Guidelines Question (c) Outlines the ph of internal and external organs Provides thorough reasons for them being maintained at those levels Provides examples of both internal and external organs Identifies the ph of internal and external organs Provides a basic reason for the ph being maintained Provides example(s) Identifies the ph of both internal or external organs Identifies a reason for ph to be maintained Identifies internal external organs Question (a) Identifies the correct sequence of steps for the dissolution and distribution of medication throughout body Identifies ONE step Identifies more than ONE step but incorrectly sequenced Question (b) Provides disadvantages of using oral medications with a supporting statement for the use of subdermal implants Provides advantages of using subdermal implants with a supporting statement for the use of subdermal implants Identifies a disadvantage of using oral medications and supports either statement Identifies an advantage of subdermal implants and supports either statement Lists advantage(s)/disadvantage(s) of using oral medications Lists advantage(s)/disadvantage(s) of using subdermal implants

4 00 HSC Senior Science Marking Guidelines Question 4 (a) Correctly draws and labels cartilage, tendon and muscle on the diagram in correct anatomical position Correctly draws and labels TWO of either cartilage, tendon or muscle on the diagram Correctly draws and labels ONE of either cartilage, tendon muscle on the diagram 4 Question 4 (b) Identifies the function of both cartilage and tendons Identifies a function of either cartilage tendons Question 5 Identifies materials for both parts correctly and provides thorough reason related to each biomaterial 4 Identifies materials for both parts correctly and provides sound reason related to each biomaterial Identifies materials for both parts correctly and provides basic reasoning related to each biomaterial Identifies correct materials Relates ONE property of a biomaterial to its use 4

5 00 HSC Senior Science Marking Guidelines Question 6 Demonstrates a thorough knowledge and understanding of properties of energy Relates how electromagnetic waves are used in technologies for communication and medicine Gives examples of technologies used in medicine and communication and names the type of energy used Communicates with coherence and logical progression and includes correct use of scientific terms and ideas Demonstrates a sound knowledge and understanding of properties of energy Relates how electromagnetic waves are used in technologies for communication and medicine Gives an example for both medicine and/or communication, naming the type of energy used Communicates clearly using scientific terms States that technologies use energy in the form of electromagnetic waves Gives a correct example for medicine/communication, using a named energy form States that technologies use electromagnetic waves Identifies that electromagnetic waves can be used to carry energy Gives a correct example of a device using a named electromagnetic wave/other energy form Question 7 Identifies TWO communication devices/technologies Relates an advantage of using a range of devices to the examples given Identifies TWO communication devices Gives ONE advantage of using a range of devices Identifies a communication device Gives an advantage of this device identifies an application of this device Identifies a communication device States an advantage of using a communication device 4 5

6 00 HSC Senior Science Marking Guidelines Question 8 (a) Identifies features of the orbit that cause a satellite to be geostationary Identifies a feature of the orbit that causes a satellite to be geostationary Question 8 (b) Uses a diagram and text to clearly show the relative positions of satellite, Australia and equator Uses a diagram and text to show some of the requirements needed for a geostationary satellite Provides a correct and relevant statement about the geostationary satellites Provides a diagram which shows ONE feature of geostationary satellite States ONE feature of a geostationary satellite 4 Question 9 Sketches in general terms FOUR changes to the method that would 4 provide more valid and reliable results Sketches in general terms THREE changes to improve the method s validity or reliability Provides TWO changes that would improve reliability and/or validity Provides a strategy to improve validity Provides a change for either reliability or validity 6

7 00 HSC Senior Science Marking Guidelines Question 0 Demonstrates a thorough knowledge of technological advances that have had an impact on people and society Makes a judgement on the value of the stated advances Relates the outcomes of technological advances to maintaining humans as functioning organisms Provides examples Communicates with coherence and logical progression and includes correct use of scientific principles and ideas Demonstrates a sound knowledge and understanding of technological advances that have had an impact on people and society Provides example(s) Communicates some scientific principles and ideas in a clear manner Demonstrates a basic knowledge of technological advances that have had an impact on people and society Provides example(s) Communicates in a basic form, using general scientific terms Demonstrates a limited knowledge of technological advances Communicates simple ideas

8 00 HSC Senior Science Marking Guidelines Section II Question (a) (i) Provides a definition of the term polymerisation Question (a) (ii) Names TWO natural polymers and compares their properties Names TWO natural polymers and compares ONE property Names ONE natural polymer and outlines a property Question (b) (i) States a relevant problem Question (b) (ii) Identifies and supports a relevant strategy related to the problem identified in (i) Identifies a relevant strategy and relates it to the problem identified in (i) Identifies a relevant strategy Question (c) (i) Provides features of the results of a first-hand investigation to identify the effect of temperature on different polymers Makes a relevant statement about the effect of temperature on polymers 8

9 00 HSC Senior Science Marking Guidelines Question (c) (ii) Identifies potential risks and shows how they would be managed Identifies a potential risk and shows how it would be managed Identifies TWO potential risks Identifies a potential risk in the investigation Identifies a method of managing a relevant risk Question (d) Demonstrates coherence and logical progression Describes the contributions of scientific work to society Differentiates scientific work from social contributions Makes a statement of value Refers to given example Describes a contribution of scientific work to society Refers to given example Makes a relevant statement about example given 4 5 9

10 00 HSC Senior Science Marking Guidelines Question (e) Demonstrates thorough knowledge and understanding of plastics and their impacts Gives examples of several plastics with reference to their properties and uses Supports clear arguments or conclusions Communicates with coherence and logical progression and includes correct use of scientific principles and ideas Demonstrates sound knowledge and understanding of plastics Gives an example of ONE plastic and refers to its properties or the uses of plastics Communicates some scientific ideas in a clear manner Demonstrates basic knowledge of plastics Identifies a few properties or uses of plastics Communicates ideas in a basic form, using general scientific terms Demonstrates a limited knowledge of plastics Identifies ONE property or ONE use of plastics Communicates simple ideas Question (a) (i) Correctly names an additive that is not a preservative Question (a) (ii) Clearly states how roles of preservatives are different to other food additives, giving an example(s) Identifies the role of preservatives and another food additive Identifies the role of either a preservative or another food additive Question (b) (i) States a relevant problem 0

11 00 HSC Senior Science Marking Guidelines Question (b) (ii) Identifies and supports a strategy related to the problem identified in (i) Identifies a relevant strategy and relates it to the problem identified in (i) Identifies a relevant strategy Question (c) (i) Provides features of the results of a first-hand investigation to demonstrate the solubilities of nitrates, nitrites and sulfites Makes a relevant point about nitrates/nitrites or sulfites Question (c) (ii) Compares the roles of nitrates, nitrites and sulfites and their use in food as preservatives Describes the role(s) of nitrates/nitrites and sulfites as preservatives Makes a relevant point about the role of chemical preservatives in foods Question (d) Demonstrates coherence and logical progression Describes the contributions of scientific work to society Differentiates scientific work from social contribution Makes a statement of value Refers to given example Describes a contribution of scientific work to society Refers to given example Makes a relevant statement about example given 4 5

12 00 HSC Senior Science Marking Guidelines Question (e) Demonstrates thorough knowledge and understanding of the need for control and labelling of food additives Provides relevant examples Provides a judgement Communicates with coherence and logical progression and includes correct use of scientific ideas Demonstrates sound knowledge and understanding of the need for control and labelling of food additives Provides relevant examples Communicates some scientific ideas in a clear manner Demonstrates a basic knowledge of the need for control and labelling of food additives Provides example(s) Communicates in basic form, using general scientific terms Demonstrates a limited knowledge of additives in food Communicates simple ideas Question (a) (i) Names THREE types of blood vessels Names fewer than THREE types of blood vessels Question (a) (ii) Clearly shows the difference in structure AND blood-carrying capacities of two blood vessels Shows the difference in structure blood-carrying capacity of two blood vessels Question (b) (i) States a relevant problem

13 00 HSC Senior Science Marking Guidelines Question (b) (ii) Identifies and supports a relevant strategy related to the problem identified in (b) (i) Identifies a relevant strategy and relates it to the problem identified in (b) (i) Identifies a relevant strategy Question (c) (i) Provides features of the results of a first-hand investigation to culture bacteria from everyday surroundings Makes a relevant statement about culturing bacteria Question (c) (ii) Identifies potential risks and shows how they would be managed Identifies a potential risk and shows how it would be managed Identifies TWO potential risks Identifies TWO management practices Identifies a potential risk in the investigation Identifies a method of managing a relevant risk Question (d) Demonstrates coherence and logical progression Describes the contributions of scientific work to society Differentiates scientific work from social contribution Makes a statement of value Refers to given example Describes a contribution of scientific work to society Refers to given example Makes a relevant statement about example given 4 5

14 00 HSC Senior Science Marking Guidelines Question (e) Demonstrates thorough knowledge and understanding of the nervous system Relates pain detection and responses to pain through the nervous system Communicates with coherence and logical progression and includes correct use of scientific terms and ideas Demonstrates sound knowledge and understanding of the nervous system Relates pain detection and responses to pain through the nervous system Communicates some scientific ideas in a clear manner Demonstrates a basic knowledge of the nervous system Communicates ideas in a basic form using general scientific terms Demonstrates a limited knowledge of the nervous system Communicates simple ideas Question 4 (a) (i) Correctly identifies a community organisation active in disaster relief Question 4 (a) (ii) States the roles of the SES and RFS by: Including similarities Including differences Includes only similarities Includes only differences Includes similarities and differences but is not explicit about roles Gives a role of the RFS or SES Question 4 (b) (i) States a relevant problem relating to safety 4

15 00 HSC Senior Science Marking Guidelines Question 4 (b) (ii) Identifies a relevant strategy related to the problem identified in (i) and includes a supporting statement Identifies a relevant strategy and relates it to the problem identified in (i) Identifies a relevant strategy Question 4 (c) (i) Provides observations of the results of a first-hand investigation to compare flammability of dry and fresh leaves Makes a relevant statement about flammability of leaves Question 4 (c) (ii) Demonstrates a clear understanding of the application of the results to reduce bushfire risk in rural areas Provides a basic description of how to reduce risk of bushfire in rural areas, related to results of investigation States how risk could be reduced with no reference to results Question 4 (d) Demonstrates coherence and logical progression Describes the contributions of scientific work to society Differentiates scientific work from social contribution Makes a statement of value Refers to given example Describes a contribution of scientific work to society Refers to given example Makes a relevant statement about example given 4 5 5

16 00 HSC Senior Science Marking Guidelines Question 4 (e) Demonstrates thorough knowledge and understanding of disasters caused by atmospheric pressure with examples Provides an explanation of how atmospheric pressure is monitored Communicates with coherence and logical progression and includes correct use of scientific principles and ideas Demonstrates sound knowledge and understanding of disasters caused by atmospheric pressure with examples Provides an explanation of how atmospheric pressure is monitored Communicates some scientific principles and ideas in a clear manner Demonstrates a basic knowledge of disasters caused by atmospheric pressure or monitoring of these disasters Provides at least ONE example of how atmospheric pressure is monitored Communicates ideas in a basic form, using general scientific terms Demonstrates a limited knowledge of disasters caused by atmospheric pressure or monitoring of these disasters Communicates simple ideas Question 5 (a) (i) Identifies TWO spin-offs Identifies a spin-off Question 5 (a) (ii) Provides a statement describing original use and current use Identifies original use or current use Question 5 (b) (i) States ONE problem 6

17 00 HSC Senior Science Marking Guidelines Question 5 (b) (ii) Clearly describes ONE strategy and provides support/reason for its effectiveness Identifies ONE strategy and makes a judgement Describes ONE strategy Identifies ONE strategy Question 5 (c) (i) Provides features of a named system used for human space travel Identifies a system other than the space shuttle Provides a feature without identifying the system Question 5 (c) (ii) Sketches in general terms advantages and disadvantages related to the system in part (i) Provides an advantage and a disadvantage Provides an advantage/disadvantage and relates it to system from part (i) Provides an advantage a disadvantage Question 5 (d) Demonstrates coherence and logical progression Describes the contributions of scientific work to society Differentiates scientific work from social contribution 4 5 Makes a statement of value Refers to given example Describes a contribution of scientific work to society Refers to given example Makes a relevant statement about example given 7

18 00 HSC Senior Science Marking Guidelines Question 5 (e) Demonstrates a thorough knowledge and understanding of the strategies and materials used Provides relevant examples Provides a judgement Communicates with coherence and logical progression and includes correct use of scientific ideas Demonstrates a sound knowledge and understanding of the strategies and materials used Provides relevant examples Communicates some scientific ideas in a clear manner Demonstrates a basic knowledge of the strategies and materials used Provides examples Communicates in basic form using general scientific terms Demonstrates a limited knowledge of strategies or materials used Communicates simple ideas

19 Senior Science 00 HSC Examination Mapping Grid Question Content Syllabus outcomes Section I Part A 9... H H H H , H H , H H , H , 4.(a), (d), (g) H0, H H ,. (c) H0, H.(c), (d) H , H H H H H9 9.(c), 4.(a) H7, H9, H, H ,.(c),.4(b) H7, H9, H Section I Part B (a) 9... H8 (b) 9..., 9... H8 (c) 9... H8 (a) 9... H8 (b) 9... H8 (c) , H7, H8, H9 (a) ,.(e) H8, H (b) 9..5, H9 4 (a) ,. H9, H 4 (b) 9..., 9... H , 9...8,.(c), 4.(a), (b), (c) H8, H, H , , , 4.b H, H0, H H0 8 (a) H0

20 00 HSC Senior Science Mapping Grid Question Content Syllabus outcomes 8 (b) ,.(e) H0, H ,.(a) H0, H , 4.(b) H4, H9, H4 Section II Question Polymers (a) (i) H8 (a) (ii) H8 (b) (i) 4.(a), 4.(a) H4 (b) (ii) , , , 4.(b), (d), 4. H6, H8, H4 (c) (i) ,.(b) H8, H (c) (ii).(b),.(b), (d) H8, H, H (d) H, H4, H8 (e) , 4.(b) H4, H8, H4 Section II Question Preservatives and Additives (a) (i) H8 (a) (ii) H8 (b) (i) 4.(a), 4.(a) H4 (b) (ii) , , , 4.(b), (d), 4. H7, H4 (c) (i) ,.(b) H8, H (c) (ii) , , 4.(c) H8, H4 (d) H, H4, H8 (e) , , , 4.(b) H4, H8, H4 Section II Question Pharmaceuticals (a) (i) H9 (a) (ii) H9 (b) (i) 4.(a), 4.(a) H4 (b) (ii) , 4.(b), (d), 4. H7, H8, H4 (c) (i) ,.(b) H (c) (ii) ,.(b),.(b), (d) H, H (d) H, H4, H8 (e) , , , 4.(b) H7, H9, H4 Section II Question 4 Disasters (a) (i) , H4 (a) (ii) , H4 (b) (i) 4.(a), 4.(a) H (b) (ii) , 4.(b), (d), 4. H4 (c) (i) ,.(b) H8, H (c) (ii) , , , 4.(c) H0, H4 (d) 5 9.8,.(e), 4.(e) H, H, H4

21 00 HSC Senior Science Mapping Grid Question Content Syllabus outcomes (e) , 4.(b) H4, H4 Section II Question 5 Space Science (a) (i) H4 (a) (ii) H, H4 (b) (i).(c) H (b) (ii) , , 4.(b) H4 (c) (i) H, H6 (c) (ii) H, H6 (d) 5 9.9,.(e), 4.(e) H, H4, H (e) , 9.9.4, 4.(b) H, H, H8, H4