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Cambridge International Examinations Cambridge Secondary 1 Checkpoint



1113/01



SCIENCE Paper 1



October 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.



This document consists of 12 printed pages. IB19 10_1113_01/4RP © UCLES 2019



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Checkpoint Secondary 1 Science – Mark Scheme PUBLISHED



October 2019



Page 2 of 12



/ 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



Annotations and abbreviations



1113/01



1(b)(i)



1(a)



Question



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Page 3 of 12



no nucleus = 1 mark to carry more oxygen / more space for haemoglobin = 1 mark



OR



large surface area (to volume ratio) / biconcave / thin membrane / permeable membrane = 1 mark to absorb oxygen quickly / to absorb oxygen easily / more oxygen diffuses / to allow oxygen to enter more easily = 1 mark



OR



flexible / rounded shape / small = 1 mark to pass through capillaries / to pass through narrow blood vessels = 1 mark



OR



contains haemoglobin = 1 mark to carry oxygen = 1 mark



any one from



because it is made up of several different tissues



organ



Answer



Marks



Further Information



October 2019



how the structure is related to function = 1 mark



2 structural feature = 1 mark



Accept contains more than one type of cell



2 Note if not organ = 0 for the question



Checkpoint Secondary 1 Science – Mark Scheme PUBLISHED



2(c)



diffusion



Page 4 of 12



because particles move faster / hit sides of bottle harder / more collisions with bottle / particles have more energy



increases



2(b)



Answer



idea of (gas) particles colliding with the bottle



which can contract



(long) fibre



Answer



Marks



Marks



October 2019



Further Information



1



2 Note this marking point is independent of the first marking point



1 Accept particles hit the bottle / particles bounce off bottle



Further Information



how structure relates to function = 1 mark



2 structural feature = 1 mark



Checkpoint Secondary 1 Science – Mark Scheme PUBLISHED



2(a)



Question



1(b)(ii)



Question



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4(b)



4(a)



Question



3



Question



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Page 5 of 12



has 8 legs / 4 pairs of legs / body divided into 2 main parts / lacks antennae



C (does the animal have) 1 pair of legs per segment? / ‘feelers’ on its ‘tail’ idea?



B (does the animal have) wings?



A (does the animal have) 6 legs? / 3 pairs of legs? / 3 body sections?



Answer



the same.



the same.



The amplitude of the sound stays



The volume of the sound stays



The frequency of the sound decreases.



The pitch of the sound decreases.



Answer



Marks



Marks



October 2019



Further Information



1



Note question requires a yes answer for the centipede



Accept are there stripes on the body?



Note question requires a yes answer for the bee



3 Note question requires a yes answer for the insects (ants and bees)



Further Information



4 each correct sentence = 1 mark



Checkpoint Secondary 1 Science – Mark Scheme PUBLISHED



large (dorsal) fin / long (dorsal) fin



streamlined (body) / long and thin (body)



(long) muscular body



large teeth / sharp teeth



Page 6 of 12



any two from



6(b)(ii)



large powerful jaws



(black colour means) it can hunt without being seen / cannot be seen by prey



6(b)(i)



Answer



carbon sulfate



(very) large eyes / big eyes



any value from 3–6



carbon hydroxide



carbon dioxide carbon carbonate



C



Answer



Marks



Marks



Further Information



October 2019



Accept long and narrow / long and slim



Accept large mouth



2 Ignore reference to tail



1 Accept camouflaged / blends in with surroundings / difficult to be seen



1 Ignore has night vision



Further Information



1 Accept a range providing it is inclusive of range in mark scheme



1 more than one circle = 0 marks



1



Checkpoint Secondary 1 Science – Mark Scheme PUBLISHED



6(a)



Question



5(b)(ii)



5(b)(i)



5(a)



Question



1113/01



As the speed increases by 16 km/h the thinking distance increases



7(b)



thinking distance



7(d)



more than doubles



stopping distance



more than doubles



braking distance



doubles



24 (m)



7(c)



Page 7 of 12



by 3m (each time) / equally / by the same amount



96 (m)



Answer



Marks



Further Information



one or two correct = 1 mark



2 three correct = 2 marks



1



2



1



Checkpoint Secondary 1 Science – Mark Scheme PUBLISHED



7(a)



Question



1113/01



October 2019



8(c)



tube B (idea that) there is no air or oxygen present (in the water)



8(b)



Page 8 of 12



(idea that) destroys or damages object (made of iron or steel) / weakens objects (made of iron or steel) / rusting does not look nice / need to regularly replace object (made of iron or steel)



tube C (idea that) there is no water present



oxygen



Answer



Marks



Accept water has been removed / the tube is dry



Accept very little air or oxygen in the tube



Accept oil stops air or oxygen from entering / oil blocks oxygen



Further Information



October 2019



Accept becomes brittle / rust increases friction (in machines)



1 Note answer does not have to mention iron or steel but if a named metal is given it must be iron or steel



2



1



Checkpoint Secondary 1 Science – Mark Scheme PUBLISHED



8(a)



Question



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9



Question



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turn the (cell) battery around



remove the switch



remove the iron nail



Page 9 of 12



change the iron nail to a wooden pencil



add more coils to the insulated wire



add another switch



add another cell (battery)



Answer



Marks



Further Information



October 2019



four or more answers = 0 marks



one correct answer and two incorrect answers = 0 marks



two correct answers and one incorrect answer = 1 mark



one correct answer and one incorrect answer = 1 mark



2 two correct answers = 2 marks



Checkpoint Secondary 1 Science – Mark Scheme PUBLISHED



any two from



10(b)



anchor muscles



support



movement (of joints)



protection (of internal organs)



bone



10(a)



Question



1113/01



Answer



Page 10 of 12



Marks



Further Information



October 2019



2



Accept storage for minerals e.g. calcium or phosphate



1 Do not accept ligament / muscle / bone marrow



Checkpoint Secondary 1 Science – Mark Scheme PUBLISHED



11(b)



11(a)



Question



1113/01



Page 11 of 12



Accept magnesium is more reactive than zinc / ora



magnesium is the fastest / zinc is slower than magnesium



comparison involving rate = 1 mark



comparison involving time = 1 mark



2 Note if yes = 0 marks for the question



variable measured = 1 mark



all correct in any order = 2 marks but two correct = 1 mark one correct = 0 marks



4 variable changed = 1 mark



Further Information



Note just quoting times is not sufficient



Marks



October 2019



zinc does not take the shortest time (to make 50 cm3 of gas) / magnesium takes the shortest time (to make 50 cm3 of gas)



no (no mark)



D / time to make 50 cm3 of gas



B and C and E



A / the metal used



Answer



Checkpoint Secondary 1 Science – Mark Scheme PUBLISHED



12(b)



12(a)



 



Question



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Earth is spinning / Earth is rotating



stars



3. Sun



2. Neptune



1. Venus



Answer



Page 12 of 12



Marks



Further Information



2 Accept Earth is moving



one or two correct = 1 mark



2 three correct = 2 marks



Checkpoint Secondary 1 Science – Mark Scheme PUBLISHED



October 2019