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\nVersion:1.0 Final Mark Scheme  \nMark schemes are prepared by the Lead Assessment Writer and considered,together with the relevantquestions,by a panel of subject teachers.This mark scheme includes any amendments made at thestandardisation events which all associates participate in and is the scheme which was used by them inthis 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.Alternativeanswers not already covered by the mark scheme are discussed and legislated for.If,after thestandardisation process,associates encounter unusual answers which have not been raised they arerequired to refer these to the Lead Examiner.  \nIt must be stressed that a mark scheme is a working document,in many cases further developed andexpanded on the basis of students'reactions to a particular paper.Assumptions about future markschemes on the basis of one year's document should be avoided;whilst the guiding principles ofassessment remain constant,details willchange,depending on the content of a particular examinationpaper.  \nFurther copies of this mark scheme are available from aqa.org.uk  \n# Copyright information\n\nAQA retains the copyright on all its publications.However,registered schools/colleges for AQA are permitted o copy material from this booklet for their owninternal use,with the followingimportant exception:AQA cannot give permission to schools/colleges to photocopy any material that is acknowledged to a thirdparty even for internal use within the centre.  \nCopyright ◎2020 AQA and its licensors.All rights reserved.  \n# Information to Examiners\n\n1.General  \nThe mark scheme for each question shows:  \n·the marks available for each part of the question  \n·the total marks available for the question  \n·the typical answer or answers which are expected  \n·extra information to help the Examiner make his or her judgement  \n·the Assessment Objectives,level of demand and specification content that each question is intendedto cover.  \nThe extra information is aligned to the appropriate answer in the left-hand part of the mark scheme andshould only be applied to that item in the mark scheme.  \nAt the beginning of a part of a question a reminder may be given,for example:where consequentialmarking needs to be considered in a calculation;or the answer may be on the diagram or at a differentplace on the script.  \nIn general the right-hand side of the mark scheme is there to provide those extra details which confusethe main part of the mark scheme yet may be helpful in ensuring that marking is straightforward andconsistent.  \n# 2.Emboldening and underlining\n\n2.1 In a list of acceptable answers where more than one mark is available ‘any two from'is used,withthe number of marks emboldened.Each of the following bullet points is apotential mark.  \n2.2 A bold and is used to indicate that both parts of the answer are required to award the mark.  \n2.3 Alternative answers acceptable for a mark are indicated by the use of or.Different terms in themark scheme are shown by al;eg allow smooth /free movement.  \n2.4 Any wording that is underlined is essential for the marking point to be awarded.  \n# 3.Marking points\n\n## 3.1 Marking of lists\n\nThis applies to questions requiring a set number of responses,but for which students haveprovided extra responses.The general principle to be followed in such a situation is that 'right+wrong =wrong'.  \nEach error/contradiction negates each correct response.So,if the number of error/  \ncontradictions equals or exceeds the number of marks available for the question,no marks can beawarded.  \nHowever,responses considered to be neutral (indicated as*in example 1)are not penalised.  \nExample 1:What is the pH of an acidic solution","cbCaiaCEykABpNM6","https://ap.wps.com/l/cbCaiaCEykABpNM6","pdf",1549374,"English","# Information to Examiners\n## General\n## Emboldening and underlining\n## Marking of lists\n## Use of chemical symbols /formulae\n## Marking procedure for calculations\n## Interpretation of ‘it'\n## Errors carried forward\n## Phonetic spelling\n## Brackets\n## Allow\n## Ignore","[{\"question\":\"What information does the mark scheme provide for each question part?\",\"answer\":\"It shows the marks available for each part, the total marks for the question, typical expected answers, extra information for examiner judgement, and the assessment objectives and specification content the question targets.\"},{\"question\":\"How does the mark scheme handle acceptable answers in lists?\",\"answer\":\"When more than one mark is available, it uses phrases like “any two from”. Each bullet point can be a mark, and if contradictions or errors equal or exceed the marks available, no marks are awarded; neutral responses are not penalised.\"},{\"question\":\"How are marks awarded for calculations and errors?\",\"answer\":\"Marks are awarded for each correct stage shown in working as instructed, though full marks can be given for a correct numerical answer without working. Errors may be penalised once only, using the ecf allowance where appropriate.\"}]","GCSE Combined Science: Trilogy 8464/C/1H - Mark Scheme - June 2020 | PDF"]