CONFIDENTIAL DRAFT Further information on Higher Physics Course Assessment (January 2014) Key points Physics (Higher) is a new Course, but includes some familiar content found in the current Higher Physics Course and is very similar to the Revised Higher Physics Course. As the Course assessment support material was developed, the further mandatory information in the Course Assessment Specification was reviewed and updated. An updated Couse Assessment Specification will be republished in due course. At Higher, the Course assessment will have two components: a question paper and an assignment. The question paper assesses the added value of the course with a particular focus on breadth — drawing on knowledge and skills from across the Course — and application in theoretical contexts. Candidates will apply breadth of knowledge from across the Course, and depth of understanding, to answer appropriately challenging questions in physics contexts. The assignment assesses the added value of the course, with a particular focus on challenge (requiring greater depth or extension of knowledge and/or skills) and application. Candidates will apply skills of scientific inquiry, using related knowledge, to carry out an in-depth study of a physics topic. The topic will be chosen by the candidate, who will investigate/research the underlying physics. Course assessment will be out of 120 marks in total. The question paper will have 130 marks in total. Section 1 has 20 marks, and Section 2 has 110 marks (which will be scaled back to 80 marks). The assignment will have 20 marks. Higher Specimen Question Paper (publication by 28 February 2014) The purpose of the question paper is to assess breadth of knowledge from across the Course, depth of understanding, and application of this knowledge and understanding. Candidates will do this by answering appropriately challenging questions. The question paper allows candidates to demonstrate knowledge and understanding by making statements and providing descriptions and explanations, and integrating knowledge. It will also give candidates an opportunity to demonstrate the following skills, knowledge and understanding: Demonstrating knowledge and understanding of physics by making statements and providing descriptions and explanations, and integrating knowledge. Applying knowledge of physics to new situations, interpreting information and solving problems. Planning and designing experiments/practical investigations to test given hypotheses or to illustrate particular effects, including safety measures. Selecting information and presenting information appropriately in a variety of forms. Processing information (using calculations, significant figures and units, where appropriate). Making predictions from evidence/information. Drawing valid conclusions and giving explanations supported by evidence/justification. Evaluating experimental procedures, identifying sources of uncertainty and suggesting CONFIDENTIAL DRAFT January 2014 CONFIDENTIAL DRAFT improvements. Marks will be distributed approximately proportionately across the Units. The majority of the marks will be awarded for applying knowledge and understanding. The other marks will be awarded for applying scientific inquiry, scientific analytical thinking and problem solving skills. The question paper will have two sections. Section 1 will have 20 marks, and will consist of objective questions. This section will give candidates an opportunity to demonstrate breadth of knowledge from across the areas specified in the ‘Further mandatory information on Course coverage’ section at the end of the Course Assessment Specification. Section 2 will have 110 marks (which will be scaled back to 80 marks). It will consist of restricted and extended response questions. This section will give candidates an opportunity to demonstrate application of knowledge and understanding to answer appropriately challenging context-based questions. They will do this by drawing on and applying knowledge from the ‘Further mandatory information on Course coverage’ section at the end of the Course Assessment Specification. A standard resource containing relevant data and formulae will be provided for use by candidates while sitting the question paper. (For sample questions from the current draft of the Specimen Question paper, please see Appendix 1) Higher Specimen Coursework (publication by 31 March 2014) The assignment will require the candidate to carry out an in-depth study of a physics topic. The topic will be chosen by the candidate (to be reviewed by the assessor) who will investigate/ research the underlying physics. It will give candidates an opportunity to demonstrate the following skills, knowledge and understanding: applying physics knowledge to new situations and analysing information and solving problems selecting information and presenting information appropriately in a variety of forms processing information (using calculations, significant figures and units, where appropriate) drawing valid conclusions and giving explanations supported by evidence/justification communicating findings/information effectively The evidence for this assessment takes the form of a report. The report will be submitted to SQA for external marking. This assignment has two stages: a research stage a communication stage, during which the report is written CONFIDENTIAL DRAFT January 2014 CONFIDENTIAL DRAFT The research stage will be conducted under some supervision and control. The communication stage will be conducted under a high degree of supervision. The assignment will have 20 marks, which will be distributed against the following criteria: Skills, knowledge and understanding Mark allocation Aim(s) 1 Applying knowledge and understanding of physics 4 Selecting information 2 Processing and presenting data/information 4 Analysing data/information 2 Conclusion(s) 2 Evaluation 3 Presentation 2 (For further information from the current draft of the assignment, please see Appendix 2) CONFIDENTIAL DRAFT January 2014 CONFIDENTIAL DRAFT Appendix 1 Examples of types of questions for Higher Question Paper Section 1 Section 1 will have 20 marks, and will consist of objective questions. The types of questions in this section will be similar to those seen in previous Higher Physics Question Papers. Section 2 Section 2 will have 110 marks which will be scaled back to 80 marks It will consist of restricted and extended response questions. Possible types of Section 2 question are shown in examples 1, 2 and 3. Example 1 A linear accelerator is used to accelerate protons. The accelerator consists of hollow metal tubes placed in a vacuum. R S proton beam 35 kV alternating supply metal tube The diagram shows the path of protons through the accelerator. Protons are accelerated across the gaps between the tubes by a potential difference of 35 kV. (a)The protons are travelling at 1·2 x 106 ms-1 at point R. (i) Show that the work done on a proton as it accelerates from R to S is 5·6 x 10-15 J. Space for working and answer (ii) 2 Calculate the speed of the proton as it reaches S. Space for working and answer 5 (b) Suggest one reason why the lengths of the tubes increase along the accelerator. Space for working and answer 1 Total marks CONFIDENTIAL DRAFT January 2014 8 CONFIDENTIAL DRAFT Example 2 A student explains the expansion of the Universe using an “expanding balloon” model. The student draws “galaxies” on a balloon and then inflates it. Use your knowledge of physics to comment on this model. Space for working and answer 3 Total marks 3 Example 3 A student is investigating the refractive index of a perspex block for red light. The student directs a ray of red light towards a semicircular perspex block as shown. The angle of incidence (i) is then varied and the angle of refraction (r) measured using a protractor. CONFIDENTIAL DRAFT January 2014 CONFIDENTIAL DRAFT The following results are obtained I ( °) r (°) sin i sin r 10 16 0·17 0·28 15 25 0·26 0·42 20 32 0·34 0·53 25 37 0·42 0·60 30 53 0·50 0·80 (a) (i) Using square ruled paper, draw a graph to show how varies with . 3 (ii) Use the graph to determine the refractive index of the perspex for this light. Space for working and answer 2 (iii) Suggest two ways in which the experimental procedure could be improved to obtain a more accurate value for the refractive index. Space for working and answer 2 (b) The perspex block is replaced by an identical glass block with a refractive index of 1∙54 and the experiment is repeated. Determine the maximum angle of incidence that would produce a refracted ray. Space for working and answer CONFIDENTIAL DRAFT 3 January 2014 CONFIDENTIAL DRAFT Total marks Answer Guidance Example Expected response 1 Ew=QV (1) EW 1 6 1019 35000 (1) a 5 6 1015 J b Original Max mark (1) Additional guidance 2 5 Ek = ½ (1∙673 10-27)( 1∙2 106 )2 Ek = 1∙20 10-15J (1) New Ek = 1∙20 10-15 + 5∙6 10-15J New Ek = 6∙8 10-15J (1) Ek = ½ mv2 6∙8 10-15 = ½ (1∙673 10-27)( v )2 (1) v = 2∙85 106 ms-1 c Alternating voltage has constant frequency (1) 1 (1) OR As speed of protons increases, they travel further in the same time. (1) 2 This is an open ended question 0 marks: Demonstrates no understanding: no evaluation is offered, or a judgment is made that is not correct in terms of the physics used. 1 mark: The candidate has demonstrated a limited understanding of the physics involved. The candidate has made some comments/responses which are relevant to the situation, showing CONFIDENTIAL DRAFT 3 Open ended question – a variety of Physics ideas, explanations and/or statements can be used to answer this question Marks are awarded on the basis of whether the answer, overall, demonstrates ‘no’, January 2014 10 CONFIDENTIAL DRAFT ‘limited’, ‘reasonable’ or ‘good’ understanding. that at least a little of the physics within the question is understood 2 marks: The candidate has demonstrated a reasonable understanding of the physics involved. The candidate has made some comments/responses which are relevant to the situation, showing that the question is understood. 3 marks: The maximum available mark would be awarded to a candidate who has demonstrated a good understanding of the physics involved. The candidate shows a good comprehension of the physics of the situation and has provided a logically correct answer to the question posed. This type of response might include a statement of the principles involved, a relationship or an equation, and the application of these to respond to the situation outlined in the question. This does not mean the answer has to be what might be termed an ‘excellent’ answer or a ‘complete’ one. 3 a i ii Labels (quantities and units) and scale (1) Points correctly plotted (1) Correct best fit line (1) Gradient of graph (1) Refractive index = 1∙50 3 Non-linear scale = 0 marks Allow ½ division tolerance in plotting points 2 (1) 1 mark for knowing to calculate the gradient of best fit line. 1 mark for correct value. Repeated measurements Increased range of measurements 2 1 mark each up to a maximum of 2 marks. Narrower beam of light Increase the number of values within the range Note – do not accept ‘bigger protractor’ Protractor with more precise scale e.g. CONFIDENTIAL DRAFT January 2014 CONFIDENTIAL DRAFT 1/2o divisions b (1) 3 (1) (1) CONFIDENTIAL DRAFT January 2014 CONFIDENTIAL DRAFT Appendix 2 Extracts from draft Higher Physics Assignment The assignment requires the candidate to carry out an in-depth study of a physics topic. The topic will be chosen by the candidate (with guidance from the Centre) who will investigate/ research the underlying physics. In the course of their Assignment, candidates are required to: choose a relevant topic in physics (the assessor must review the appropriateness of the topic chosen) state appropriate aim(s) research the topic by selecting relevant data/information process and present relevant data/information analyse data/information state conclusion(s) evaluate their investigation explain the underlying physics of the topic researched present the findings of the research in a report. Draft Marking Instructions for Higher Physics assignment: Criteria Expected response Max mark Additional guidance Aim(s) Candidate states appropriate aim(s) 1 The aim(s) must be clearly stated and appropriate to the investigation undertaken. Apply knowledge and understanding of physics Candidate explains the topic, using the underlying physics 4 4 marks should be awarded to a candidate who has provided correct explanations of the topic researched using physics terms/ideas which are at a depth appropriate to Higher Physics (this does not mean the answer has to be ‘excellent’ or ‘complete’) 3 marks should be awarded to a candidate who has provided mostly correct explanations of the topic researched using physics terms/ideas which are at a depth appropriate to Higher Physics 2 marks should be awarded to a candidate CONFIDENTIAL DRAFT January 2014 CONFIDENTIAL DRAFT who has provided some correct explanations of the topic researched using physics terms/ideas which are at a depth appropriate to Higher Physics 1 mark should be awarded to a candidate who has provided only one correct explanation of the topic researched, using physics terms/ideas which are at a depth appropriate to Higher Physics 0 marks: The candidate fails to meet the minimum standards required for 1 mark. Select information Selects sufficient relevant data/information for inclusion in the report 2 2 marks: The data/information selected by the candidate for presentation/processing/analysis is both relevant and sufficient. 1 mark: The data/information selected by the candidate for presentation/processing/analysis is relevant but insufficient 0 marks: The data/information selected by the candidate for presentation/processing/analysis is neither relevant nor sufficient This could include raw data from an experiment/practical activity, extracted tables, graphs, diagrams and text. It might include, for example, statistical, graphical, numerical or experimental data; data/information from the internet; published articles or extracts; notes taken from a visit or talk; notes taken from a written or audio-visual source. Process and present Data/information 4 is processed CONFIDENTIAL DRAFT Processing can include, for example: performing calculations, manipulating data, summarising referenced text (although the January 2014 CONFIDENTIAL DRAFT data/information and presented marks are awarded for processing, it must be clear where the raw or extracted data/information came from) Presenting processed data/information can include for example appropriate formats from: summary, graph, table, chart or diagram (one must be graph, table, chart or diagram). In each case, sufficient detail should be included to convey the data/information. In all cases the candidate must clearly reference the source of the original data. 4 marks should be awarded to a candidate who has processed and presented all data/information correctly and appropriately 3 marks should be awarded to a candidate who has processed all data/information correctly and appropriately and presented most data/information correctly and appropriately or who has processed most data/information correctly and appropriately and presented all data/information correctly and appropriately. 2 marks should be awarded to a candidate who has processed and presented some of the data/information correctly and appropriately 1 mark should be awarded to a candidate who has processed and presented little data/information correctly and appropriately. 0 marks: The candidate fails to meet the minimum standards required for 1 mark. Analyse data/information Data/information 2 is analysed CONFIDENTIAL DRAFT Analysis will include interpreting data/information included in the report (which may/may not have been processed by the January 2014 CONFIDENTIAL DRAFT candidate) to identify relationships. This may include further calculations. 2 marks for correctly analysing the data/information. 1 mark for some correct analysis of the data/information. 0 marks: The candidate fails to meet the minimum standards required for 1 mark. Conclusion(s) States valid conclusion(s) 2 2 marks for stating at least 2 conclusion(s) that relate(s) to the aim(s) and is supported by evidence from the candidate’s research. 1 mark for stating a conclusion that relate(s) to the aim(s) and is supported by evidence from the candidate’s research. 0 marks: The candidate fails to meet the minimum standards required for 1 mark. Evaluation Evaluation of the investigation 3 For marks to be awarded for evaluation, candidates must make judgements based on criteria. The criteria, upon which judgements of the investigation are made, may include the following (not an exhaustive list): Robustness of findings Validity of sources Evaluation of experimental procedures One mark for each valid, evaluative comment based on relevant criteria, to a maximum of three marks. 0 marks: The candidate has not met the standards described for 1 mark. CONFIDENTIAL DRAFT January 2014 CONFIDENTIAL DRAFT Presentation Appropriate presentation References 2 Maximum of 2 marks for the presentation of the report 1 mark for each of: Appropriate title and structure The references to at least two sources used in the report are given in sufficient detail to allow them to be retrieved by a third party. If one of the sources is an experiment/practical activity, then the title and the aim should be recorded. 20 CONFIDENTIAL DRAFT January 2014