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[PDF] October 2009 CAIE P2 Mark Schemes 0843 Science Cambridge Primary Checkpoint.pdf | Plain Text

This document consists of 12 printed pages. IB09 11_0843_02/MS © UCLES 2009 [Turn over *5549533829 * UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS Cambridge International Primary Achievement Test SCIENCE 0843/02 Paper 2 October/November 2009 MARK SCHEME Maximum Mark : 50 IMPORTANT NOTICE Mark Schemes have been issued on the basis of one copy per Assistant examiner and two copies per Team Leader.

2 © UCLES 2009 0843/02/MS/O/N/09 Science mark schemes – Achievement Test Guidelines for marking test papers These mark schemes are designed to provide you with all the information \ necessary to mark the Primary Achievement Tests. As far as possible, the mark schemes giv\ e you full guidance regarding acceptable and unacceptable alternative answers and, where app\ ropriate, include examples of student work to illustrate the marking points. Howe\ ver, it is not always possible to predict all the alternative answers that may be produced by \ students and there could be places where the marker will have to use their professional jud\ gement. In these cases it is essential that such judgement be applied consistently. The guidelines below should be followed throughout (unless the mark scheme states otherwise ):  A correct answer should always be awarded full marks even if the working\ shown is wrong.  Where more than one mark is available for a question the mark scheme exp\ lains where each mark should be awarded. In some cases marks are available fo\ r demonstration of the correct method even if the final answer is incorrec\ t. The method marks can be awarded if the correct method is used but a mistake has bee\ n made in the calculation, resulting in a wrong answer. Method marks can also be \ awarded if the calculation is set up and performed correctly but incorrect values h\ ave been used, e.g. due to misreading the question or a mistake earlier in a seri\ es of calculations.  If a question uses the answer to a previous question or part question th\ at the student got wrong, all available marks can be awarded for the latter question if\ appropriate calculations are performed correctly using the value carried forward. P\ laces where such consideration should be made are indicated in the mark schemes. In\ these cases, it is not possible to provide all the alternative acceptable answ\ ers and the marker must follow the student’s working to determine whether credit \ should be given or not.  Half marks should not be awarded and at no point should an answer be awa\ rded more than the maximum number of marks available, regardless of the quali\ ty of the answer. Similarly, negative marks should never be awarded.  If the student has given more than one answer or has supplied additional\ redundant information the marks can be awarded if all the answers given are correc\ t and non- contradictory (even if some are irrelevant). However, if any incorrec\ t answers/information are given the marks should not be awarded, similarly\ if additional information contradicts the first answer the marks should not be awarded\ (marks for correct working out can still be gained).

3 © UCLES 2009 0843/02/MS/O/N/09 [Turn over  If the answer line is blank but the correct answer is given elsewhere, e\ .g. an annotation on a graph or at the end of the working out, the marks can be\ awarded provided it is clear that the student has understood the requirements of\ the question.  If the student has produced redundant additional working after the corre\ ct answer has been reached the marks can be awarded provided the extra work does n\ ot contradict that already done.  Each question and part question should be considered independently and m\ arks for one question should not be disallowed if they are contradicted by workin\ g or answers in another question or part question.  Any legible crossed-out work that has not been replaced can be marked; b\ ut if work has been replaced the crossed-out part should be ignored.  Diagrams, symbols or words are acceptable for explanations or responses.\  Where students are required to indicate the correct answer in a specific\ way, e.g. by underlining or ticking boxes, marks should be awarded for any unambiguou\ s indication, e.g. circling, crossing boxes etc.  Any part of speech is acceptable, e.g. refraction, refracting, refracted\ , and singular and plural forms are acceptable unless otherwise stated, e.g. alveolus, \ alveoli.  Spelling errors should not be penalised where the meaning is clear. In \ the case of specific scientific vocabulary, misspellings should only be accepted if \ the student’s response is phonetically equivalent to the correct answer. For questions involving quantities, e.g. length, mass, time or money, co\ rrect units must be given in the answer. The table shows acceptable and unacceptable versio\ ns of the answer 1.85m.

4 © UCLES 2009 0843/02/MS/O/N/09 Correct answer Also accept Do not accept Units are not given on answer line and the question does not specify a unit 1.85m Correct conversions provided that the unit is stated, e.g. 1m 85cm 185cm 1850mm 0.00185km 1.85 185m If the unit is given on the answer line, e.g. ……………m …..1.85…… m Correct conversions, provided the unit is stated unambiguously, e.g. …..185cm….. m …..185……m …..1850.… m etc. If the question states the unit that the answer should be given in, e.g. “Give your answer in metres” 1.85m 1.85 1m 85cm 185; 1850 Any conversions to other units. Note: if the answer line is left blank but the correct answer is given e\ lsewhere on the page it can be marked correct if the units match those on the answer line or are\ unambiguously stated. Each question on the test paper has a box beside it for the teacher to r\ ecord the mark obtained. It is advisable to use these boxes so that students, and othe\ rs looking at the test papers, can clearly see where the marks have been awarded. It is also u\ seful to use the boxes because it makes the process of entering the data into the analysi\ s tool easier. The page total boxes can be used to aid addition. Finally, it should also be noted that marking in red ink and using the m\ ark boxes is an essential requirement for the Achievement tests. A working marksheet, together with instructions for its completion, is i\ ncluded in this mark scheme. A completed copy should be despatched with the moderation sample\ .

5 © UCLES 2009 0843/02/MS/O/N/09 [Turn over Question Mark Answer 1 4Pe1 2 1 mark for each one correct For every additional tick deduct 1 mark. Question Mark Answer 2 3Pf1 3 a horse pulling a cart the mass of a van a magnet attracting a nail striking a match a jug of boiling water 1 mark for each correct answer For every additional tick deduct 1 mark. Question Mark Answer 3a 4Bh1 1 Bone(s) b 4Bh1 2 helps us to move helps us to reproduce protects internal organs provides food c 4Bh1 1 skull Accept: cranium.

6 © UCLES 2009 0843/02/MS/O/N/09 Question Mark Answer 4a 5Cs2 1 Condensation / condensing b 5Cs2 1 To cool down the vapour / to cool it down. Do not accept: to condense it c 5Cs2 1 No d 5Cs2 1 Only the water is evaporated / only water comes over / all the sugar is left in the heated test- tube / none of the sugar evaporates. Question Mark Answer 5a Bh1/2 1 1 fruit 1 mark water 1 mark b Bh2/3 1 1 tooth decay 1 mark obesity/gets fat 1 mark Accept: teeth go bad/rotten. Do not accept: teeth are damaged. Do not accept: will become diabetic.

7 © UCLES 2009 0843/02/MS/O/N/09 [Turn over Question Mark Answer 6a 4Cs3 1 ice-cream b 4Cs3 1 butter c 4Cs3 1 22/23 units not necessary (given in graph) d 4Cs3 1 Wrap it in aluminium foil. Put it in a plastic box. Wrap it in newspaper. Put it in a glass jar. e 4Cs3 1 It is a good insulator of heat. / It prevents the heat getting to the ice-cream. If answer to (d) is incorrect the mark for (e) can be given if correct. Question Mark Answer 7a 4Be1 3 1. for catching food 2. for swimming fast movement in water. 3. for standing on snow / ice and for swimming. b 4Be1 1 Thick layers of fat to stay warm Strong wings for swimming Sharp teeth to eat food Lives alone Award the mark for correct two boxes and no others ticked. Award 0 marks if more than two boxes ticked.

8 © UCLES 2009 0843/02/MS/O/N/09 Question Mark Answer 8a 6Pf1 6Pf2 1 On Earth his weight is 80 Newtons. In space his mass is 80 kg. Mass and weight are the same. On the Moon his mass is 80 kg. Both correct for 1 mark. Award 0 marks of more than two boxes ticked. b(i) 6Pf1 6Pf2 1 g or kg (ii) 6Pf1 6Pf2 1 Newtons Accept: N Question Mark Answer 9a 5Cs1 2 Units not required 100 0 b 5Cs1 1 The water is evaporating / has evaporated Accept: water turns to gas. c 5Cs1 1 stays the same

9 © UCLES 2009 0843/02/MS/O/N/09 [Turn over Question Mark Answer 10 5Bp2 3 Seed falls into water then is carried away. Seed is eaten by an animal. Seed is carried by the wind. Seed sticks to a passing animal. Award 3 marks for all 4 correct. Award 2 marks for 2 or 3 correct. Award 1 mark for 1 correct. Question Mark Answer 11a(i) 4Si1 4Sp2 1 Distance (ii) 4Si1 4Sp2 1 cm b 4Si1 4Sp2 1 Jane c(i) 4Si1 4Sp2 1 8 (cm) (ii) 4Si1 4Sp2 1 Her reaction time is improving. Accept: she will stop getting better after try 4. Question Mark Answer 12a 6Pe1 2 Metal paper clip, iron nail 1 mark for each one correct For every additional answer deduct 1 mark Accept: clip, nail b 6Pe2 1 insulator

10 Permission to reproduce items where third-party owned material protected by copyright is included has been sought and\ cleared w here possible. Every reasonable effort has been made by the publisher (UCLES) to t race copyright holders, but if any items requiring clearance have unwittingly been included, the publisher will be pleased to make amends at the earliest possible opport\ unity. University of Cambridge International Examinations is part of the Cambridge Assessment Group. Cambridge Assessment is the brand name of University of Cambridge Local Examinations Syndicate (UCLES), which is itself a depa\ rtment of the University of Cambridge. © UCLES 2009 0843/02/MS/O/N/09 Question Mark Answer 13a(i) 5Pl7 1 Luminous / sources Or both (ii) 5Pl8 1 opaque b 5Pl10 2 Sunlight shines on Venus 1 mark Reflection of sunlight 1 mark Venus reflects the sunlight 2 marks Award 0 marks for the idea that the Sun reflects light from Venus. Question Mark Answer 14a 3Pf2 1 The ball moves / accelerates / goes b 3Pf3 1 The shape changes / dents

0843/2/CW/S CAMBRIDGE INTERNATIONAL PRIMARY PROGRAMME ACHIEVEMENT TEST – SCIENCE PAPER 2 NOVEMBER 2009 0843/02 Please read the instructions printed overleaf before completing this form. Centre Number Centre Name Question Number Total Mark Cand. Number Candidate Name 1 2 3a 3b 3c 4a 4b 4c 4d 5a 5b 6a 6b 6c 6d 6e 7a 7b 8a 8bi 8bii 9a 9b 9c 10 11a i 11a ii 11b 11c i 11c ii 12a 12b 13a i 13a ii 13b 14a 14b max 50 Teacher completing this form (BLOCK CAPITALS) Date Name of moderator (BLOCK CAPITALS) Date

0843/2/CW/S A. INSTRUCTIONS FOR COMPLETING WORKING MARK SHEET 1. Complete the information at the head of the form. 2. List the candidates in an order which will allow ease of transfer of information to a computer-printed mark sheet (MS1) at a later stage (i.e. in candidate index number order, where this is known). 3. Enter each candidate’s mar ks on this form as follows: a) In the question columns, enter the marks awarded. b) In the columns headed ‘Total Mark ’, enter the total mark awarded. 4. Ensure that the addition of marks is independently checked. 5. Both the teacher completing this form and the internal moderator should check the form and complete the bottom portion. B. PROCEDURES FOR EXTERNAL MODERATION 1. University of Cambridge International Examinations (CIE) sends a computer-printed mark sheet (MS1) to each centre showing th e name and index number of each candidate. Transfer the total internally moderated mark for e ach candidate from this WORKING MA RK SHEET to the computer-printed mark sheet (MS1). 2. Despatch the top copy of the computer-printed mark sheet (MS1) to CIE. The deadlines for r eceipt of this completed document are 15 June for the June examination and 16 November for the November examination. 3. Send samples of the candidates’ work covering the full ability range, together wit h this form and the se cond copy of MS1, by 15 June for the June examination and 16 November for the November examination. 4. If there are 10 or fewer candidates entering the Achi evement Test, send all the sc ripts for every candidate. 5. If there are more than 10 candidates, send the scripts that contributed to the final mark for the num ber of candidates as fo llows. The marks of the candidates’ work selected should cover the whole mark range with marks spaced as evenly as possible from the top mark to the lowest mark. number of candidates entered number of candidates whose work is required 11-50 51-100 above 100 10 15 20 6. If different teachers have prepared classes, select the samples from the classes of different teachers. 7. CIE reserves the right to ask for further samples of scripts.