CONFIDENTIAL DRAFT Further information on National 5 Specimen Question Paper, National 5 Specimen Coursework Chemistry Key points Chemistry (National 5) is a new Course, but includes some familiar content found in Standard Grade Credit and Intermediate 2 Chemistry Courses. At National 5, the Course assessment will consist of two components: a question paper and an assignment. The question paper requires learners to demonstrate aspects of breadth and application in theoretical contexts. Learners will apply breadth of knowledge from across the Course, and depth of understanding, to answer appropriately challenging questions in chemistry contexts. The assignment requires learners to demonstrate aspects of challenge and application. Learners will apply skills of scientific inquiry, using related knowledge, to carry out an in-depth study of a chemistry topic. The topic will be chosen by the learner, who will investigate/research the underlying chemistry and the impact on the environment/society. Course assessment will be out of 100 marks in total (Question paper- 80 marks & Assignment- 20 marks). Chemistry National 5 Specimen Question Paper (publication by 28 February 2013) 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. Learners will do this by answering appropriately challenging questions. The question paper allows learners to demonstrate knowledge and understanding by making statements, describing information, providing explanations and integrating knowledge. It will also give learners an opportunity to demonstrate the following skills, knowledge and understanding: applying knowledge of Chemistry to new situations, interpreting information and solving problems planning and designing experiments/investigations selecting and presenting information appropriately in a variety of forms processing information/data analysis (using calculations and units, where appropriate) making predictions and generalisations based on evidence/information drawing valid conclusions and giving explanations supported by evidence /justification suggesting improvements to experiments The question paper will have 80 marks (80% of the total mark). 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 CONFIDENTIAL DRAFT CONFIDENTIAL DRAFT 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 learners 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 60 marks, and will consist of restricted and extended response questions. This section will give learners 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 table in 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. National 5 Specimen Coursework (publication by 30 April 2013) The purpose of the assignment is to allow the learner to carry out an in-depth study of a chemistry topic. The topic will be chosen by the learner, who will investigate/ research the underlying chemistry and the impact on the environment/society. It will give learners an opportunity to demonstrate the following skills, knowledge and understanding: applying knowledge of chemistry to new situations and interpreting information selecting and presenting information appropriately in a variety of forms processing the information/data collected (using calculations and units, where appropriate) drawing valid conclusions and giving explanations supported by evidence/justification communicating findings/information The assignment will have 20 marks (20% of the total mark). It will be set by the centre and conducted under some supervision and control. Marks will be awarded for: the aim of the investigation the relevance of chosen topic relevant points from named sources the application of the topic presentation of data/results an evaluation of the impact on the environment/society a conclusion knowledge and understanding related to the topic communicating the findings of the investigation This should take the form of a report. The report will be submitted to SQA for external marking. CONFIDENTIAL DRAFT CONFIDENTIAL DRAFT National 5 Sample Questions and Tasks Chemistry Examples of types of questions for National 5 Question Paper Section 1 Section 1 will have 20 marks, and will consist of objective questions. Possible types of Section 1 question are shown in examples 1 and 2. Example 1 Which line in the table correctly shows the two families of compounds which react together to produce esters? A carboxylic acid cycloalkane B alcohol alkene C cycloalkane alkene D carboxylic acid alcohol Example 2 The structure below shows a section of an addition polymer. CONFIDENTIAL DRAFT CONFIDENTIAL DRAFT Which of the following molecules is used to make this polymer? A B C D Answer Guidance Question Expected response Max Mark 1 D 1 2 B 1 Section 2 Section 2 will have 60 marks, and will consist of restricted and extended response questions. Possible types of Section 2 question are shown in examples 3 and 4. CONFIDENTIAL DRAFT CONFIDENTIAL DRAFT Example 3 Technetium-99m is used in medicine to detect damage to heart tissue. It is a gamma-emitting radioisotope and is injected into the body. (a) The half-life of technetium-99m is 6 hours. How much of a 2g sample of technetium-99m would be left after 12 hours? 2 (b) Suggest one reason why technetium-99m can be used safely in this way. 1 (c) Technetium-99m is formed when molybdenum-99 decays. The decay equation is: 99 Mo 42 99 + X Tc 43 Identify X. 1 Example 4 Antacid tablets are used to treat indigestion which is caused by excess acid in the stomach. Different brands of tablets contain different active ingredients. magnesium carbonate calcium carbonate magnesium hydroxide aluminium hydroxide fizzes fizzes does not fizz does not fizz Cost per gram (pence) 16 11 7.5 22 Mass of solid needed to neutralise 20 cm3 of acid (g) 0.7 1.2 0.6 0.4 13.2 4.5 8.8 Name of active ingredient Reaction with acid Cost of neutralising 20 cm3 of acid (pence) (a) Write the ionic formula for aluminium hydroxide (b) (i) 1 Complete the table to show the cost of using magnesium carbonate to neutralise 20 CONFIDENTIAL DRAFT CONFIDENTIAL DRAFT cm3 of acid. (ii) 1 Which one of the four active ingredients would you use to neutralise excess stomach acid? 1 Explain your choice Answer Guidance Question Expected response Max mark Additional guidance 3 1 mark for number of half- lives is 2 2 Allow follow through if number of halflives is incorrect a 1 mark for ¼ of 2 = 0.5g 2 marks for 0.5g b Short half life 1 Would not last long in the body Gamma would go right through body c 4 1 Do not accept electron Al3+(OH-)3 1 Charges of ions must be given Beta / β / a / b i 16 x 0.7 = 11.2 1 b ii Named active ingredient with appropriate reason, eg 1 magnesium hydroxidecheapest/doesn’t fizz aluminium hydroxide – need to take least amount CONFIDENTIAL DRAFT CONFIDENTIAL DRAFT Example Assignment Task for National 5 Chemistry Assignment The purpose of the assignment is to allow the learner to carry out an in-depth study of a chemistry topic. The topic will be chosen by the learner, who will investigate/ research the underlying chemistry and the impact on the environment/society. In the course of their Assignment, candidates are required to: choose a topic in Chemistry that has an impact on the environment/ society state the aim and give a rationale for the topic to be researched investigate/research the topic, focusing on applications and impact on the environment/society. state the application(s) of the topic. present data/results evaluate the impact on the environment/ society. draw a conclusion use chemistry knowledge and understanding related to the topic investigated/researched. communicate the findings of the investigation CONFIDENTIAL DRAFT National 5 Sample Marking Instructions for CONFIDENTIAL DRAFT Assignments NATIONAL 5 (CRITERIA ) NATIONAL 5 Read through the whole of the candidate’s answer and use the Marking Guidelines below to arrive at a ’best-fit’ mark. N.B. The candidate's response must match the candidate's own data TOTAL: 20 MARKS: [Skills 16/KU 4 (6 - A marks)] 0 MARKS 1 MARK 2 MARKS 3 MARKS 4 MARKS The aim of the investigation The report contains: No appropriate aim The report contains: Appropriate aim The relevance of chosen topic No relevance for chosen topic Relevance for chosen topic Investigate/rese arch the topic, No relevant points from named source Relevant points from one named source Relevant points from two named sources No relevant application is given A relevant application is given A relevant application is given, with a description. Presentation of data/results No relevant data presented / data is not presented in an appropriate format Relevant data is presented in an appropriate format Relevant data is presented correctly in an appropriate format, with partial labelling Relevant data is presented correctly in an appropriate format, with all appropriate labelling. An evaluation of the impact on society / the environment No impact on the environment / society is stated An impact on the environment / society is stated An impact on the environment / society is stated, with a limited explanation An impact on the environment / society is stated, with a reasonable explanation A conclusion No valid conclusion stated A valid conclusion is stated. No knowledge and understanding related to the topic investigated/resear ched is given. One of: Account of underlying chemistry relevant to aims Chemistry terms/ideas are clear and Two of: Account of underlying Chemistry relevant to aims Chemistry terms/ideas are clear and All of: Account of underlying Chemistry relevant to aims Chemistry terms/ideas are clear and The application of the topic Describe the chemistry knowledge and understanding related to the topic investigated / researched CONFIDENTIAL DRAFT An impact on the environment/ society is stated, with a good explanation CONFIDENTIAL DRAFT Communicate the findings of the investigation. This should take the form of a report No evidence of: Appropriate and informative title, contents page and page numbers References cited in text Report is clear and concise CONFIDENTIAL DRAFT at an appropriate depth Chemical importance is explained / justified Any one of: Appropriate and informative title, contents page and page numbers References cited in text Report is clear and concise at an appropriate depth Chemical importance is explained / justified Any two of: Appropriate and informative title, contents page and page numbers References cited in text Report is clear and concise at an appropriate depth Chemical importance is explained / justified Any three of : Appropriate and informative title, contents page and page numbers References cited in text Report is clear and concise