Download [PDF] April 2018 CAIE P2 Mark Schemes 1113 Science Cambridge Lower Secondary Checkpoint

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[PDF] April 2018 CAIE P2 Mark Schemes 1113 Science Cambridge Lower Secondary Checkpoint.pdf | Plain Text

This document consists of 16 printed pages. IB18 05_1113_02/RP © UCLES 2017 [Turn over Cambridge International Examinations Cambridge Secondary 1 Checkpoint SCIENCE 1113/02 Paper 2 April 2018 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.

1113/02 Checkpoint Secondary 1 Science – Mark Scheme April 2018 PUBLISHED ©UCLES 2018 Page 2 of 16 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

1113/02 Checkpoint Secondary 1 Science – Mark Scheme April 2018 PUBLISHED ©UCLES 2018 Page 3 of 16 Question Answer Marks Further Information 1(a)(i) protein 1Note if more than one food group given = 0 for the question 1(a)(ii) muscle is made of protein / needed for growth / needed for repair 1Accept develops muscle / strengthens muscles / for muscles Accept for cell division / make new cells / regenerate muscles quicker 1(b) any two from (idea of) contains carbohydrate provides (lots of) energy needed for respiration 2 Accept contains carbs / (starch) broken down into glucose or sugar

1113/02 Checkpoint Secondary 1 Science – Mark Scheme April 2018 PUBLISHED ©UCLES 2018 Page 4 of 16 Question Answer Marks Further Information 2(a) Gases can flow to fill a container.   Gases only form at temperatures above 100°C.  The particles in a gas are arranged randomly.   The particles in a gas are close together.   The particles in a gas can only vibrate.  2each correct tick = 1 mark three ticks and two correct = 1 mark three ticks and one correct = 0 marks four or five ticks = 0 marks 2(b) any two from particles lose energy / (some) particles have less kinetic energy / (some) particles move slower (idea of) forces between particles increase / greater attraction between particles particles have moved closer together / distance between particles is smaller 2Note the answer should refer to particles, atoms or molecules Accept intermolecular forces increase or get bigger

1113/02 Checkpoint Secondary 1 Science – Mark Scheme April 2018 PUBLISHED ©UCLES 2018 Page 5 of 16 Question Answer Marks Further Information 3 The sound with a higher pitch than A is E. The sound with a larger volume (louder) than A is B . The sound with a smaller frequency than A is D . The sound with a smaller amplitude than A is C . 4each correct sentence = 1 mark

1113/02 Checkpoint Secondary 1 Science – Mark Scheme April 2018 PUBLISHED ©UCLES 2018 Page 6 of 16 Question Answer Marks Further Information 4(a) any three from large eyes / wide eyes (to gather max light) forward facing eyes (for 3D vision) large ears / ears on side of head (for sensitive hearing) long fingers (to grasp trees) large snout / large nose (suggesting a keen sense of smell) big legs / strong legs / long legs long tail (for balance) 3features must be visible in the diagram Accept large hands / large paws Accept muscular legs

1113/02 Checkpoint Secondary 1 Science – Mark Scheme April 2018 PUBLISHED ©UCLES 2018 Page 7 of 16 4(b) any two from (money can be used to:) maintain the nature reserve / improve the nature reserve / money used to build more reserves for a breeding program / can release more into the wild / help improve chances of breeding idea that can improve the health of the tarsiers / can provide food create new habitats / avoids habitat destruction / control (number of people) destroying wild habitats increase education / idea of increase awareness / increase publicity to prevent poaching research into causes of decline reduce tourism in unprotected areas 2

1113/02 Checkpoint Secondary 1 Science – Mark Scheme April 2018 PUBLISHED ©UCLES 2018 Page 8 of 16 Question Answer Marks Further Information 5(a) metal number of bubbles A (0) B (6) C 15 D 3 2correct heading = 1 mark Accept bubbles produced / count of bubbles produced / bubbles of incorrect gas produced 15 and 3 in correct place = 1 mark 5(b) collect the gas in a measuring cylinder  collect the gas in a test tube repeat the experiment the same way use a smaller piece of metal 1more than one box ticked = 0 marks 5(c) yes and there were more bubbles in the tubes 1no = 0 marks yes unqualified = 0 marks Question Answer Marks Further Information

1113/02 Checkpoint Secondary 1 Science – Mark Scheme April 2018 PUBLISHED ©UCLES 2018 Page 9 of 16 6(a) asteroid Earth Moon planet star 1more than one answer circled = 0 marks 6(b) light reflected (off the comet) light from the Sun 2Accept reflected sunlight = 2 marks Accept light from a star

1113/02 Checkpoint Secondary 1 Science – Mark Scheme April 2018 PUBLISHED ©UCLES 2018 Page 10 of 16 Question Answer Marks Further Information 7 any two from (idea of) they were not afraid of humans so they were easy to catch (idea of) the new animals ate their food (idea of) the new animals ate their eggs / attacked their nests (idea of) they were hunted by humans (idea that) new animals were predators of dodo (idea that) they lost their habitat / no nesting sites (idea of) it couldn’t fly to escape the new animals that were introduced / it could not fly to move to a new habitat (idea that) animals the humans brought had diseases 2each correct answer = 1 mark Accept new animals or humans destroy eggs Accept humans killed dodos

1113/02 Checkpoint Secondary 1 Science – Mark Scheme April 2018 PUBLISHED ©UCLES 2018 Page 11 of 16 Question Answer Marks Further Information 8(a) lithium + water lithium hydroxide + hydrogen 3reactants in either order = 1 mark lithium hydroxide as one product = 1 mark hydrogen as one product = 1 mark 8(b) lithium only contains one type of atom 2Note if lithium hydroxide or water = 0 for the question 8(c) increases / get more reactive 1Accept becomes more vigorous Accept francium will be the most reactive / sodium is the least reactive Question Answer Marks Further Information 9 any two from the apparatus gets hot / risk of getting burnt the pins are sharp / risk of getting skin wound the wax catches fire 2

1113/02 Checkpoint Secondary 1 Science – Mark Scheme April 2018 PUBLISHED ©UCLES 2018 Page 12 of 16 Question Answer Marks Further Information 10(a) any two from they are looking for a mate (idea that) smell carried (long distances) in air currents flowers look like (female) fly (from a distance) attracted to the scent / attracted to the smell 2 Accept they think the flowers are (female) flies 10(b) transfer of pollen (grains from the anther) pollen (grains) going to the stigma of a flower 2Accept the transfer of pollen from one flower to another flower = 1 mark Accept to transfer pollen from anther to the stigma = 2 marks Question Answer Marks Further Information 11 particle Y = neutrons particle Z = protons 2Accept Z = neutrons and Y = protons = 1 mark

1113/02 Checkpoint Secondary 1 Science – Mark Scheme April 2018 PUBLISHED ©UCLES 2018 Page 13 of 16 Question Answer Marks Further Information 12 weight of A = 6 (N) 2correct answer = 2 marks if incorrect answer, accept correct method for 1 mark, e.g. 3 × 4 = 2 × A or 12 = 2 × A or 3×4 2 = A or 12 2 = A Question Answer Marks Further Information 13 water / carbon dioxide 1Accept chlorophyll Ignore chloroplast

1113/02 Checkpoint Secondary 1 Science – Mark Scheme April 2018 PUBLISHED ©UCLES 2018 Page 14 of 16 Question Answer Marks Further Information 14 Like poles of magnets repel.  Magnets always have N and S written on them. Magnets do not work if they are in water. Magnets attract iron, cobalt and nickel.  The force of attraction is greater at the poles than in the middle of the magnet.  2three correct ticks = 2 marks two correct ticks = 1 mark one correct tick = 0 marks four ticks, three correct = 1 mark Question Answer Marks Further Information 15 A Jupiter B Uranus C Neptune 1all three correct = 1 mark

1113/02 Checkpoint Secondary 1 Science – Mark Scheme April 2018 PUBLISHED ©UCLES 2018 Page 15 of 16 Question Answer Marks Further Information 16(a) parallel circuit with closed switch series circuit with closed switch parallel circuit with open switch parallel and series circuit with open switch series circuit with open switch 1more than one answer circled = 0 marks 16(b) ammeter 1

1113/02 Checkpoint Secondary 1 Science – Mark Scheme April 2018 PUBLISHED ©UCLES 2018 Page 16 of 16 Question Answer Marks Further Information 17 (A) 40 / 30 = 1.33 (m / s) (B) 120 / 60 = 2 (m / s) (C) 30 / 60 = 0.5 (m / s) or if no calculations done B (is faster than) C because in same time travels further = 1 mark in 60 seconds A travels 80 m and B (is faster) since travels 120 m = 1 mark 2three calculations = 2 marks one or two calculations = 1 mark Accept speed = distance ÷ time, 120÷ 60 is bigger than all the others = 1 mark Accept the time for B is double that of A but distance travelled by B is trebled = 1 mark