Download [PDF] October 2021 CAIE P1 Mark Scheme 1113 Science Cambridge Lower Secondary Checkpoint

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This document has 14 pages. IB21 10_1113_01/6RP ? UCLES 2021 [Turn over Cambridge Lower Secondary Checkpoint SCIENCE 1113/01 Paper 1 October 2021 FINAL MARK SCHEME Maximum Mark: 50 Published This mark scheme is published as an aid to teachers and candidates, to indicate the requirements of the examinati on. It shows the basis on which Markers were instructed to award marks. It does not indicate the details of the discussions that took place at the Markers’ meeting before marking began, which would have considered the acceptability of alternative answers. Mark schemes should be read in conjunction with the question paper and the End of Series Report. Cambridge will not enter into discussions about these mark schemes.

1113/01 Checkpoint Secondary – Mark Scheme October 2021 PUBLISHED Page 2 of 14 General guidelines on marking Many descriptive answers can be expressed in a variety of ways. Professional judgement can be used in these cases, providing it matches the marking points and further information in the mark scheme. Answers may have words spelt incorrectly. Credit is normally given for phonetically correct answers, unless the word has a scientifically different meaning. For example, where the answer should be antennae, credit will be given for antena but not for anthen (too close to anther). Only the science is being assessed so answers do not need to be grammatically correct. Significant figures will be indicated in the question or in the mark scheme. Unless specified all marking points are independent. Annotations and abbreviations / or alternate responses for the same marking point ( ) brackets the words or units in bra ckets do not need to be stated, for example, (recycles or releases or provides) minerals = minerals scores the mark underline exact word is required Accept an acceptable response Do not accept indicates an incorrect response that would contradict anothe r otherwise correct alternative Ignore indicates an irrelevant answer that is not creditworthy. Full marks can still be achieved even with answers that are ignored. Note provides extra information when necessary ecf error carried forward; marks are awar ded if an incorrect response has been carried forward from earlier working, provided the subsequent working is correct ora or reverse argument; for example, as mass increases, volume increases could be written as mass decreases, volume decreases

1113/01 Checkpoint Secondary – Mark Scheme October 2021 PUBLISHED Page 3 of 14 Question Answer Mark s Further Information 1 part function artery carries blood from the heart heart pumps blood (around the body) capillary allows exchange of substances between blood and organs vein carries blood (back) to the heart 3 each corre ct answer = 1 mark Ignore pumps oxygen Ignore oxygenated or deoxygenated Ignore contracts and relaxes Accept capillaries Ignore carries blood from the tissues

1113/01 Checkpoint Secondary – Mark Scheme October 2021 PUBLISHED Page 4 of 14 Question Answer Marks Further Information 2(a) boiling condensing evaporating melting 1 more than one answer circled = 0 marks 2(b) any two from (particles are) losing energy (particles are) slowing down (particles are) becoming more ordered or arrangement becomes less random or become arranged in a lattice 2 each correct answer = 1 mark Note each answer must imply a change so particles do not move is not awarded a mark Descriptions of particles in a solid are not sufficient Accept particles get closer together or get more tightly packed or become compacted as an extra marking point Accept (attractive) forces between particles increases or gets stronger as an extra marking point

1113/01 Checkpoint Secondary – Mark Scheme October 2021 PUBLISHED Page 5 of 14 Question Answer Marks Further Information 2(c) line increasing two horizontal sections 2 ea ch correct answer = 1 mark Do not accept if any portion of the line decreases Note line does not need to start at the origin Ignore any labels on line

1113/01 Checkpoint Secondary – Mark Scheme October 2021 PUBLISHED Page 6 of 14 Question Answer Mark s Further Information 3(a) C 1 3(b) H 1 Accept Neptune 3(c) E 1 Accept Jupiter 3(d) B – Venus F – Saturn H ? Neptune 1

1113/01 Checkpoint Secondary – Mark Scheme October 2021 PUBLISHED Page 7 of 14 Question Answer Mark s Further Information 4(a)(i) collect or take in or absorb more water 1 Ignore just take in water Accept to absorb as much water as it can or increase chance of absorbing water Accept collect or take in or absorb water from a large, big or deep area Accept collect or take in or absorb water because roots have a large surface area 4(a)(ii) any one from spines or spikes (instead of leaves) to reduce water loss or spines or spikes (instead of leaves) to stop transpiration or evaporation (fleshy ) stem to store water thick waxy layer to reduce water loss 1 Accept (idea of) to stop being eaten by animals or spines to stop plant wilting Accept does not have leaves so reduced loss of water or no leaves so reduced transpiration Accept (large) stem to store water 4(b) cactus → kangaroo or rat s → snakes → (desert) fox es 2 correct names in order = 1 mark Accept reverse order all three correct arrows in the direction from cactus to fox = 1 mark

1113/01 Checkpoint Secondary – Mark Scheme October 2021 PUBLISHED Page 8 of 14 Question Answer Mark s Further Information 5(a) C B (A) E D 2 CB in correct order = 1 mark ED in correct order = 1 mark 5(b) sulfuric (acid) 1 Accept hydrogen sulfate 5(c) hydrogen 1

1113/01 Checkpoint Secondary – Mark Scheme October 2021 PUBLISHED Page 9 of 14 , Question Ans wer Mark s Further Information 6(a) 3 correct linear scale and labelling of x-axis = 1 mark correct linear scale and labelling of y-axis = 1 mark all points correctly plotted to within half a square = 1 mark Accept plots with small x, dot or dot with circle 6(b) 2 (2, 3) or (3,2.8) circled = 1 mark smooth curve through other plots = 1 mark Accept any indication of anomalous plot 6(c) (idea that) as the number of lamps increases the current decreases (idea that ) the relationship is not linear 2 each idea = 1 mark Ignore negative correlation unqualified Accept graph is not a straight line or line is curved Accept (idea that) the relationship between current and number of lamps is inversely proportional = 2 m arks

1113/01 Checkpoint Secondary – Mark Scheme October 2021 PUBLISHED Page 10 of 14 Question Answer Mark s Further Information 7(a)(i) photosynthesis 1 7(a)(ii) oxygen gluco se or sugar 2 each correct product = 1 mark 7(a)(iii) any one from provides (a source of) food provides (a source of) energy provides oxygen for respiration provides glucose for respiration 1 7(b)(i) roots 1 Accept root hairs 7(b)(ii) any one from (transported) in solution or dissolved in water through xylem (vessels ) or vascular bundles 1 Do not accept phloem

1113/01 Checkpoint Secondary – Mark Scheme October 2021 PUBLISHED Page 11 of 14 Question Answ er Mark s Further Information 8(a) measuring cylinder 1 8(b)(i) 70 (cm 3) and reaction is faster or rate is doubled 1 Accept any value from above 35 cm 3 to 70 cm 3 Accept more acid particles available to react with the excess magnesium or more collis ions between particles both correct for the mark 8(b)(ii) any two from volume of acid temperature (of acid) mass of magnesium or size of magnesium ribbon time (taken to collect the gas ) 2 each correct answer = 1 mark Do not accept concentration of acid Accept surface area of the magnesium or amount of magnesium or volume of magnesium 8(c) (idea that ) sodium would be too reactive or might explode or might burst into flames 1

1113/01 Checkpoint Secondary – Mark Scheme October 2021 PUBLISHED Page 12 of 14 Question Answer Mark s Further Information 9(a) pollute the water remove the water from the pond or destroy the habitat or pond 2 each correct answer = 1 mark Accept examples of pollution, e.g. pesticides or fertil isers or litter Accept building near the pond 9(b) Toads belong to a group of vertebrate s called amphibians . 1 more than one answer circled = 0 marks 9(c) This means the toads in the pond all belong to the same species . 1 Accept population

1113/01 Checkpoint Secondary – Mark Scheme October 2021 PUBLISHED Page 13 of 14 Question Answer Marks Further Information 10(a) A B C D 1 more than one answer circled = 0 marks 10(b) A B C D 1 more than one answer circled = 0 marks 10(c) A B C D 1 more than one answer circled = 0 marks 10(d) 4 cm / minute 5 cm / minute 8 cm / minute 40 cm / minute 1 more than one answer circled = 0 marks

1113/01 Checkpoint Secondary – Mark Scheme October 2021 PUBLISHED Page 14 of 14 Question Answer Mark s Further Information 11 At the very centre of the Earth is the core . This is surrounded by a l ayer of magma called the mantle . On top of the magma is the Earth’ s outer layer called the crust . 3 each correct answer = 1 mark Accept inner core Do not accept outer core Accept thin or thinner crust or outer crust or lithosphere Question Answer Mark s Further Information 12 (idea that ) they are destroyed by heat / they are destroyed by high temperature or (idea that ) they are destroyed by (high) pressure 1 Do not accept fossils are burned Accept by the weight of rocks on top or crushed