Download [PDF] April 2019 CAIE P1 Mark Schemes 1113 Science Cambridge Lower Secondary Checkpoint

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[PDF] April 2019 CAIE P1 Mark Schemes 1113 Science Cambridge Lower Secondary Checkpoint.pdf | Plain Text

This document consists of 10 printed pages. IB19 05_1113_01/4RP © UCLES 2019 [Turn over Cambridge Assessment International Education Cambridge Secondary 1 Checkpoint SCIENCE 1113/01 Paper 1 April 2019 MARK SCHEME Maximum Mark: 50 Published 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 Markers were instructed to award marks. It does not indicate the details of the discussions that took place at an 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 1 Science – Mark Scheme April 2019 PUBLISHED Page 2 of 10 Annotations and abbreviations / OR alternate responses for the same marking point ( ) the words or units in brackets do not need to be stated Accept an acceptable response Do not accept indicates an incorrect response that would contradict another otherwise correct alternative Ignore indicates an irrelevant answer that is not creditworthy, however, full marks can still be achieved even with the answers that are ignored ecf error carried forward, marks are awarded if an incorrect response has been carried forward from earlier working, provided the subsequent working is correct ora or reverse argument note provides extra information when necessary

1113/01 Checkpoint Secondary 1 Science – Mark Scheme April 2019 PUBLISHED Page 3 of 10 Question Answer Marks Further Information 1(a) part of a cell only in animal cells only in plant cells in both animal and plant cells cell membrane  cell wall () cytoplasm  nucleus  chloroplast  3 all four correct = 3 marks three correct = 2 marks two correct = 1 marks one correct = 0 marks 1(b) nucleus 1 Question Answer Marks Further Information 2(a) Polaris Sirius 1both required in either order = 1 mark 2(b)(i) light from the Sun is reflected by Mars 1 2(b)(ii) (idea that) Mars is a long distance from Earth / poor resolution 1Accept it is too far (away) / it is not close enough 2(c) Earth moves 1Accept Earth rotates / Earth orbits / Earth revolves

1113/01 Checkpoint Secondary 1 Science – Mark Scheme April 2019 PUBLISHED Page 4 of 10 Question Answer Marks Further Information 3(a) metamorphic sedimentary 2each correct answer = 1 mark Accept one mark for both names given but reversed 3(b) A pumice B basalt C obsidian D scoria 2all correct = 2 marks two or three correct = 1 mark one correct = 0 marks Question Answer Marks Further Information 4 F E C D 4each correct letter = 1 mark

1113/01 Checkpoint Secondary 1 Science – Mark Scheme April 2019 PUBLISHED Page 5 of 10 Question Answer Marks Further Information 5 mixture of compounds mixture of elements mixture of elements and compounds single compound single element 3each correct line = 1 mark more than one line from a diagram = 0 marks for that diagram

1113/01 Checkpoint Secondary 1 Science – Mark Scheme April 2019 PUBLISHED Page 6 of 10 Question Answer Marks Further Information 6(a)(i) oxygen 1 6(a)(ii) stop-watch / stop-clock 1 6(b)(i) it is a control variable 1Accept make a fair test / to allow a comparison / a variable that does not change 6(b)(ii) number of bubbles decreases 1 6(c) between 53 and 27 inclusive AND between 1 and 25 inclusive 1 both needed 6(d) decreases 1 Question Answer Marks Further Information 7 A × 6 or 2 × 12 4 (N) 2calculation of a moment / moment = force x distance = 1 mark correct answer of 4 (N) = 2 marks Question Answer Marks Further Information 8(a) hydrochloric (acid) 1 Accept HCl 8(b) (D) EBCA 2EBCA = 2 marks note EBAC = 1 mark note BECA = 1 mark

1113/01 Checkpoint Secondary 1 Science – Mark Scheme April 2019 PUBLISHED Page 7 of 10 Question Answer Marks Further Information 9(a)(i) time with no umbrella in seconds time with umbrella in seconds 10 14 8 9 7 13 11 15 1all correct = 1 mark Accept numbers in correct columns but in any order (the numbers do not have to match horizontally) 9(a)(ii) mean time with no umbrella= 9 mean time with umbrella = 12.75 / 12.7 / 12.8 / 13 1both correct = 1 mark Accept ecf from the table in part (b)(i)

1113/01 Checkpoint Secondary 1 Science – Mark Scheme April 2019 PUBLISHED Page 8 of 10 Question Answer Marks Further Information 9(b) A comparative statement that links air resistance with the speed or the time scores two marks for example:  the greater the air resistance the harder it is to run  more air resistance means that it takes more time to run  more air resistance the slower they run  (greater surface area has) greater air resistance so speed decreases. 2Accept reverse arguments note a conclusion without a comparison with reference to speed or time = 1 mark For example:  air resistance makes it hard to run  air resistance makes you run slowly  air resistance takes a long time to run  greater surface area gives greater air resistance / bigger object has large air resistance  more air resistance with umbrella. note answers that indicate there is no air resistance without an umbrella have a maximum mark of 1 mark (either with or without a comparison)

1113/01 Checkpoint Secondary 1 Science – Mark Scheme April 2019 PUBLISHED Page 9 of 10 Question Answer Marks Further Information 10(a) fossils 1 10(b)(i) any two from (increases in) size (decrease in number of) toes 2Accept growth / more body mass / bigger / smaller / taller Accept mane grows (bigger) / more hair on head or neck Accept tail is longer / tail length 10(b)(ii) (Charles) Darwin 1 Question Answer Marks Further information 11(a) (most reactive) magnesium zinc ( iron) tin (least reactive) copper 1all correct = 1 mark 11(b) displacement (reactions) 1 11(c) + zinc magnesium zinc sulfatemagnesium sulfate + 2reactants either order = 1 mark products either order = 1 mark

1113/01 Checkpoint Secondary 1 Science – Mark Scheme April 2019 PUBLISHED Page 10 of 10 Question Answer Marks Further Information 12(a) 1200 1000 800 600 400 200 0 200 400 600 800 1000 time in s distance in m 1200 0 2all points correctly plotted with a tolerance of ½ small square = 1 mark straight line or dot to dot through all the points = 1 mark Accept ecf from incorrectly plotted points but line should be dot to dot 12(b) Chen with a suitable linked explanation e.g. Chen because he only takes 800 s rather than 1000 s Chen because his (average) speed between 200 s and 1000 s, is faster Chen starts later but arrives (at school) at same time 1Accept any indication of the correct answer note Chen must be ringed or referred to in their answer for a mark to be awarded Question Answer Marks Further Information 13 50 (cm 3) 1 Question Answer Marks Further Information 14 In area A the dots are close together . This area is called a compression . In area B the dots are far apart. This area is called a rarefaction . 4each correct sentence = 1 mark