GCSE DESIGN AND TECHNOLOGY 8552/W

GCSE DESIGN AND TECHNOLOGY 8552/W Unit 1 Written Paper Mark scheme June 2022 Version: 1.0 Final *226g8552/w/MS* MARK SCHEME – GCSE DESIGN AND TECHNOLOGY – 8552/W – JUNE 2022 2 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 Examiner. 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 Copyright information 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. Copyright © 2022 AQA and its licensors. All rights reserved. MARK SCHEME – GCSE DESIGN AND TECHNOLOGY – 8552/W – JUNE 2022 3 Level of response marking instructions Level of response mark schemes are broken down into levels, each of which has a descriptor. The descriptor for the level shows the average performance for the level. There are marks in each level. Before you apply the mark scheme to a student’s answer read through the answer and annotate it (as instructed) to show the qualities that are being looked for. You can then apply the mark scheme. Step 1 Determine a level Start at the lowest level of the mark scheme and use it as a ladder to see whether the answer meets the descriptor for that level. The descriptor for the level indicates the different qualities that might be seen in the student’s answer for that level. If it meets the lowest level then go to the next one and decide if it meets this level, and so on, until you have a match between the level descriptor and the answer. With practice and familiarity you will find that for better answers you will be able to quickly skip through the lower levels of the mark scheme. When assigning a level you should look at the overall quality of the answer and not look to pick holes in small and specific parts of the answer where the student has not performed quite as well as the rest. If the answer covers different aspects of different levels of the mark scheme you should use a best fit approach for defining the level and then use the variability of the response to help decide the mark within the level, ie if the response is predominantly level 3 with a small amount of level 4 material it would be placed in level 3 but be awarded a mark near the top of the level because of the level 4 content. Step 2 Determine a mark Once you have assigned a level you need to decide on the mark. The descriptors on how to allocate marks can help with this. The exemplar materials used during standardisation will help. There will be an answer in the standardising materials which will correspond with each level of the mark scheme. This answer will have been awarded a mark by the Lead Examiner. You can compare the student’s answer with the example to determine if it is the same standard, better or worse than the example. You can then use this to allocate a mark for the answer based on the Lead Examiner’s mark on the example. You may well need to read back through the answer as you apply the mark scheme to clarify points and assure yourself that the level and the mark are appropriate. Indicative content in the mark scheme is provided as a guide for examiners. It is not intended to be exhaustive and you must credit other valid points. Students do not have to cover all of the points mentioned in the Indicative content to reach the highest level of the mark scheme. An answer which contains nothing of relevance to the question must be awarded no marks. MARK SCHEME – GCSE DESIGN AND TECHNOLOGY – 8552/W – JUNE 2022 4 Glossary for maths If a student uses a method which is not explicitly covered by the mark scheme the same principles of marking should be applied. Credit should be given to any valid methods. Examiners should seek advice from their senior examiner if in any doubt. [a, b] Accept values between a and b inclusive. For π Accept values in the range [3.14, 3.142] Their Accept an answer from the candidate if it has been inaccurately calculated but is subsequently used in a further stage of the question. Questions which do not ask students to show working As a general principle, a correct response is awarded full marks. MARK SCHEME – GCSE DESIGN AND TECHNOLOGY – 8552/W – JUNE 2022 5 Qu Part Marking Guidance Total marks AO 01 C illuminate Light Emitting Diodes 1 mark AO4 1a Qu Part Marking Guidance Total marks AO 02 A anti-bacterial 1 mark AO4 1a Qu Part Marking Guidance Total marks AO 03 A can be pressed into a shape or form 1 mark AO4 1a Qu Part Marking Guidance Total marks AO 04 A Bleed proof 1 mark AO4 1b Qu Part Marking Guidance Total marks AO 05 A Lamp 1 mark AO4 1a Qu Part Marking Guidance Total marks AO 06 C Iron 1 mark AO4 1a Qu Part Marking Guidance Total marks AO 07 D Plywood 1 mark AO4 1a Qu Part Marking Guidance Total marks AO 08 D Water 1 mark AO4 1a Qu Part Marking Guidance Total marks AO 09 D withstand impacts without breaking 1 mark AO4 1b MARK SCHEME – GCSE DESIGN AND TECHNOLOGY – 8552/W – JUNE 2022 6 Qu Part Marking Guidance Total marks AO 10 D Pollution is created by the burning of fossil fuels 1 mark AO4 1b Qu Part Marking Guidance Total marks AO 11 1 One mark for a correct specific modern material. NB. We are accepting specific named smart materials as they are an accepted as a subset of modern materials. . Indicative content Accept Don’t accept Carbon Fibre Memory Foam (generic) Corn starch Polymers Nylon D30 Plywood Flexible MDF Gore-Tex® Graphene Kevlar Liquid Crystal displays (LCDs) Metal Foams Nano materials Titanium Nitinol/SMA Thermochromic pigments Photochromic pigments Quantum Tunnelling Composite QTC Polymorph Semi-precious clays Accept specific all other valid responses after WW2. 1 mark AO4 1a Qu Part Marking Guidance Total marks AO 11 2 2 marks Two correct simple points of explanation or one point explained in detail possibly using a specific example of use. 1 mark One correct simple point of explanation. 0 marks No response or nothing worthy of credit. Indicative content 2 marks AO4 1b MARK SCHEME – GCSE DESIGN AND TECHNOLOGY – 8552/W – JUNE 2022 7 Please do not accept unqualified generic answers such as strong, stronger, cheap, cheaper etc. For this question we are accepting reference to smart materials as some may have been interpreted as modern materials due to recent discovery. There is some overlap. The guidance provided is illustrative and not exhaustive. Credit any worthy points made in support of the band descriptors above. • A range of materials specifically developed to meet specific product requirements, eg Pyrex® for heat resistance = 2 • Improved materials with enhanced properties not available in traditional materials, eg wood, metal = 2 • Improved durability of products in working conditions, eg heat, stress etc = 2 • Longer lasting products = 1 • Easy to work with = 0 Accept all other valid responses. Qu Part Marking Guidance Total marks AO 12 One mark for a simple reason, with a second mark available for a well explained/clarified reason. This can include correct examples. Indicative content Reasons making HDPE suitable for household bottles and containers are • Moisture resistance – they do not dissolve in water, become soggy and leak. • Chemical resistance – do not react with contents. • Durability – can be dropped without breaking. • Can be recycled – now widely recycled and used in different polymer products saving finite resources. • Ability to recycle means less materials and energy are used in primary processing of raw materials. • Can be self-coloured during manufacture – finish does not wear away as it is a full depth feature. • Manufactured in one piece, eg injection moulding lid parts, blow moulding bottle body, so a fast process making it more commercially viable for mass production. • Mould can incorporate integral ergonomic handles, eg milk containers, detergent bottles, using material for two purposes. • One material used in construction so no need to separate different materials for recycling. • In some applications containers can be refilled and reused making it better for the environment. Accept all other valid responses. 2 x 2 marks AO4 1c MARK SCHEME – GCSE DESIGN AND TECHNOLOGY – 8552/W – JUNE 2022 8 Qu Part Marking Guidance Total marks AO 13 1 Correct answer: Oscillating 1 mark AO4 1c Qu Part Marking Guidance Total marks AO 13 2 2 marks Detailed understanding of the function of the connecting linkage clearly linked to the motion of the wiper arms. 1 mark Simple understanding of the function of the connecting linkage, eg move the wipers. 0 marks No response or nothing worthy of credit. Indicative content • To ensure both wiper arms move in parallel. • Make sure the wiper arms move together in unison. • Make sure the wiper arms do not clash or bang into each other. • Ensure both wipers work at the same time to clear both sides of the windscreen. • Stabilise/ stability in the mechanism • Only one motor is needed Accept all other valid responses