UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS
for the guidance of teachers
Paper 3 (Extended Theory), maximum raw mark 80
This mark scheme is published as an aid to teachers and candidates, to indicate the requirements of the examination. It shows the basis on which Examiners were instructed to award marks. It does not indicate the details of the discussions that took place at an Examiners’ meeting before marking began, which would have considered the acceptability of alternative answers. Mark schemes must be read in conjunction with the question papers and the report on the examination.
• Cambridge will not enter into discussions or correspondence in connection with these mark schemes.
Cambridge is publishing the mark schemes for the October/November 2011 question papers for most IGCSE, GCE Advanced Level and Advanced Subsidiary Level syllabuses and some Ordinary Level syllabuses.
MARK SCHEME for the October/November 2011 question paper
International General Certificate of Secondary Education
Mark Scheme: Teachers’ version
IGCSE – October/November 2011
NOTES ABOUT MARK SCHEME SYMBOLS & OTHER MATTERS
are method marks upon which further marks depend. For an M mark to be scored, the point to which it refers must be seen in a candidate's answer. If a candidate fails to score a particular M mark, then none of the dependent marks can be scored.
are independent marks, which do not depend on other marks. For a B mark to scored, the point to which it refers must be seen specifically in the candidate’s answers.
In general A marks are awarded for final answers to numerical questions. If a final numerical answer, eligible for A marks, is correct, with the correct unit and an acceptable number of significant figures, all the marks for that question are normally awarded.
It is very occasionally possible to arrive at a correct answer by an entirely wrong approach. In these rare circumstances, do not award the A marks, but award C marks on their merits. However, correct numerical answers with no working shown gain all the marks available.
are compensatory marks in general applicable to numerical questions. These can be scored even if the point to which they refer are not written down by the candidate, provided subsequent working gives evidence that they must have known it. For example, if an equation carries a C mark and the candidate does not write down the actual equation but does correct substitution or working which shows he knew the equation, then the C mark is scored.
A C mark is not awarded if a candidate makes two points which contradict each other. Points which are wrong but irrelevant are ignored.
brackets ( )
around words or units in the mark scheme are intended to indicate wording used to clarify the mark scheme, but the marks do not depend on seeing the words or units in brackets.
e.g. 10 (J) means that the mark is scored for 10, regardless of the unit given.
indicates that this must be seen in the answer offered, or something very similar.
OR / or
indicates alternative answers, any one of which is satisfactory for scoring the marks.
means "each error or omission".
means “or words to that effect”.
Be generous about spelling and use of English. If an answer can be understood to mean what we want, give credit.
Indicates that an incorrect answer is not to be disregarded, but cancels another otherwise correct alternative offered by the candidate i.e. right plus wrong penalty applies.
Indicates that something which is not correct or irrelevant is to be disregarded and does not cause a right plus wrong penalty.
© University of Cambridge International Examinations 2011
Mark Scheme: Teachers’ version...
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