[PDF] Cambridge Lower Secondary Progression Test - Science 2018 Stage 7 - Mark Scheme.pdf | Plain Text

Cambridge Lower Secondary Progression Test Science mark scheme Stage 7 SCIENCE_S7_01_8RP © UCLES 2018

2 S/S7/MS © UCLES 2018 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 brackets do not need to be stated, for example, (recycles or releases or provides) minerals = minerals scores the mark 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. Full marks can still be achieved even with 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; for example, as mass increases, volume increases could be written as mass decreases, volume decreases

3 S/S7/MS © UCLES 2018 [Turn over Stage 7 Paper 1 Mark scheme Question 1 Part Mark Answer Further Information (a) 1 leafAccept any indication of answer but circle takes precedence more than one answer circled = 0 marks (b) (i)1 rootAccept any indication of answer but circle takes precedence more than one answer circled = 0 marks (ii)1 to grow / to reproduceAccept to produce leaves / shoots / roots / fruits / flowers / seeds and higher level answers, e.g. make protein / enzymes (c)2Any two from support (leaves / flowers) joins roots to leaves act as a storage organ transport of water transport of salts / minerals transport of food / sugarsAccept photosynthesis if the idea of transport is not qualified, award 1 mark for transport Total 5 Question 2 Part Mark Answer Further Information (a)1 gold ammonite (b)1 belemnite (c)1 flat spiral (shell)Accept (shell) is not gold in colour Accept fizzes with acid Total 3

4 S/S7/MS © UCLES 2018 Question 3 Part Mark Answer Further Information 3 Famous space scientists include Ptolemy, Copernicus and Galileo . Copernicus thought that the Sun was at the centre of the universe. One of the most distant planets is Uranus .each correct sentence = 1 mark Total 3 Question 4 Part Mark Answer Further Information (a)1 bone (cell)Accept other indication of correct answer but answer line takes precedence more than one answer = 0 marks (b)1 spinal cordAccept other indication of correct answer but answer line takes precedence more than one answer = 0 marks Total 2 Question 5 Part Mark Answer Further Information (a) (i)1 any value between 0 and below 7 less than 7 is not sufficient (ii)1 any value above 7 and up to 14 more than 7 is not sufficient (b)3indicator (idea of) adding (blue) litmus or pH indicator or pH solution or pH paper or Universal Indicator result with acid (litmus) turns red / pink (pH / Universal Indicator) turns red / orange / yellow result with alkali (litmus) turns blue / purple (pH / Universal Indicator) turns blue / purple / violetAccept other indicators with correct colour changes indicator colour must match the indicator used Total 5

5 S/S7/MS © UCLES 2018 [Turn over Question 6 Part Mark Answer Further Information (a)1 electricalAccept any indication of answer but circle takes precedence more than one answer circled = 0 marks (b)2 light thermalAccept any indication of answer but circle takes precedence each correct answer circled = 1 mark two correct and one incorrect = 1 mark if two incorrect = 0 marks (c)1 destroyed Total 4 Question 7 Part Mark Answer Further Information (a) 1E (b)3 fertilises an egg cell takes up water and minerals from soil transports oxygen in blood transports water and minerals to leaves contract to cause movement cell function each correct match = 1 mark more than one line from a cell = 0 marks for that cell Total 4

6 S/S7/MS © UCLES 2018 Question 8 Part Mark Answer Further Information 5 See table below each correct cell = 1 mark Total 5 statedistance between particlesmovement of particlesforces between particlesshape solid (close together) vibrates / moves to and fro / oscillates(very) strong (fi xed shape) liquid (close together)(move slowly in all directions) weak / not strong / stronger than in a gas / weaker than in a solid (shape of container) gas far apart / more than in a solid or liquid (move quickly in all directions)(very weak) shape of container / fi lls container / no fi xed shape

7 S/S7/MS © UCLES 2018 [Turn over Question 9 Part Mark Answer Further Information (a)1 2.8 Accept 2.8 or test 3 area 50 cm 2 next to question but answer in table takes precedence more than one answer = 0 marks (b)1 1.6Accept 2.0 (c)3 correct direction of relationship, e.g. as the area increases the time increases = 2 marks air resistance increases with increasing area = 1 markincorrect relationship, e.g. time decreases with area = 0 marks Accept positive (correlation) between area and time = 2 marks Accept correct mathematical relationships = 2 marks Accept correlation between area and time = 1 mark if only area linked to time = 1 mark Accept ora Total 5 Question 10 Part Mark Answer Further Information 3 When the arm bends upwards, the biceps muscle contracts and the triceps muscle relaxes . The biceps and triceps are antagonistic muscles.each correct answer = 1 mark Total 3

8 S/S7/MS © UCLES 2018 Question 11 Part Mark Answer Further Information (a)1D Accept other indication of correct answer but answer line takes precedence more than one answer = 0 marks (b)1C Accept other indication of correct answer but answer line takes precedence more than one answer = 0 marks (c)1A Accept other indication of correct answer but answer line takes precedence more than one answer = 0 marks Total 3 Question 12 Part Mark Answer Further Information (a) (i)1 gravity / gravitational forceAccept weight (ii)1 Accept any vertical downwardly pointing arrow anywhere on the question (b)1 Angelique exerts more force so she jumps higher. Total 3

9 S/S7/MS © UCLES 2018 [Turn over Question 13 Part Mark Answer Further Information (a) 2 (a group of living things which) can breed together and produce (fertile) offspringAccept they successfully reproduce = 2 marks a group of animals with the same genes = 2 marks (b) 1 idea of competition / compete for food / compete for habitat / compete for territory / compete for breeding sites Accept that dogs…. attack / fight with them / introduced a disease / share the same niche Total 3 Question 14 Part Mark Answer Further Information (a)1 spring balanceAccept other indication of correct answer but tick takes precedence more than one box ticked = 0 marks (b)1 rulerAccept other indication of correct answer but tick takes precedence more than one box ticked = 0 marks Total 2

10 S/S7/MS © UCLES 2018 Stage 7 Paper 2 Mark scheme Question 1 Part Mark Answer Further Information (a)2Any two from forelimbs ‘webbed’ / turned into wings smooth surface large surface area Accept has wings smooth / large wings = 2 marks (b) 1 large mouth / wide opening mouthAccept has pointed / sharp teeth / many teeth Accept has long / large tongue Total 3 Question 2 Part Mark Answer Further Information (a)2 part of scooter material clay steel tyre frame rubberfoam each correct answer = 1 mark (b)2Any two from strong lightweight / low density shiny malleable rigid does not corrode Ignore light in weight Accept not brittle Accept does not rust Total 4

11 S/S7/MS © UCLES 2018 [Turn over Question 3 Part Mark Answer Further Information (a)1 the Earth moves / the Earth is rotating / the Earth spinsDo not accept Earth is orbiting the Sun (b)1 the Earth has a tilted axisAccept other indication of correct answer but circle takes precedence more than one answer circled = 0 marks Total 2 Question 4 Part Mark Answer Further Information (a)1 to kill microorganisms / to kill any bacteria / to sterilise itAccept microbes killed / destroyed Ignore germs / bugs (b)1 the microorganisms / bacteria were caught in the bend of the tubeAccept the microorganisms from the air couldn’t get into the broth Ignore all the microorganisms have been killed Total 2

12 S/S7/MS © UCLES 2018 Question 5 Part Mark Answer Further Information (a)1 thermometer (b) (i)1 (idea that) as time increases the temperature gets higher (ii)1 50 (C)Ignore 0 (C) (c)2 In the first two minutes ice changes state from a solid to a liquid . In the next two minutes the particles gain more energy and move faster / apart .solid and liquid = 1 mark energy and faster / apart = 1 mark Total 5 Question 6 Part Mark Answer Further Information (a)1 The centre of the Earth is called the core .Accept inner / outer core (b)1 The mantle contains some liquid rock. This liquid rock is called magma . (c)1 Liquid rock that erupts from volcanoes is called lava . (d)1 When the liquid rock cools it turns into a type of rock called igneous rock.Accept basalt / granite / pumice Total 4

13 S/S7/MS © UCLES 2018 [Turn over Question 7 Part Mark Answer Further Information (a)1 speeds upAccept other indication of correct answer but circle takes precedence more than one answer circled = 0 marks (b)1 friction / air resistanceAccept resistance / drag (c) (i)1 Accept any downward pointing arrow anywhere on truck or next to truck. more than one arrow = 0 marks (ii)1 moves it downwardsAccept other indication of correct answer but circle takes precedence more than one answer circled = 0 marks Total 4 Question 8 Part Mark Answer Further Information (a)1 19-20, 18-19, 20-21all correct = 1 mark check actual size of seeds on question paper. (b)3 correct number of extra ticks ecf 18-19 2 ticks or 1 tick 20-21 1 tick 2 ticks correct totals 16-17 12 12 18-19 18 or 17 20-21 9 or 10Accept ecf from (a) for the tick marks 16-17 with correct total = 1 mark 18-19 with correct total = 1 mark 20-21 with correct total = 1 mark (c)3 14 -15 0 2 4 6 8 10 12 14 16 18 20 16 -17 18 -19 length of seeds inmm 20 -21 22 -23 total number of seeds of each size Accept ecf from (a) and (b) correct y-axis = 1 mark all bars correct = 2 marks but one or two bars correct = 1 mark Total 7

14 S/S7/MS © UCLES 2018 Question 9 Part Mark Answer Further Information (a)1 weakly acidicAccept other indication of correct answer but tick takes precedence more than 1 tick = 0 marks (b)1 (pH) 7 Total 2 Question 10 Part Mark Answer Further Information (a)1 birds / aves (b)2Any two from has feathers has a beak / has a bill has wings features need to be visible and unique to this group this mark is dependent on a correct answer to (a) Total 3 Question 11 Part Mark Answer Further Information 3 type of energy description chemical heat (thermal)gravitational potential elastic potential kinetic energy it has because it is moving energy stored in food or fuel energy it has because it has changed shapeenergy it has because of its position energy that flows because of a temperature difference five correct = 3 marks three or four correct = 2 marks one or two correct = 1 mark Total 3

15 S/S7/MS © UCLES 2018 [Turn over Question 12 Part Mark Answer Further Information (a)1 4 Accept other indication of correct answer but circle takes precedence more than one answer circled = 0 marks (b)2 reduces friction (so) skater can go fasterAccept acts as a lubricant = 1 mark Total 3 Question 13 Part Mark Answer Further Information 2 see chain below phytoplankton and killer whale in correct place = 1 mark crustacean followed by fish followed by dolphin anywhere in food chain = 1 mark phytoplankton killer whale dolphin fish crustacean sunlight Total 2

16 S/S7/MS © UCLES 2018 Copyright © UCLES, 2018 Cambridge Assessment International Education is part of the Cambridge Assessment Group. Cambridge Assessment is the brand name of the University of Cambridge Local Examinations Syndicate (UCLES), which itself is a department of the University of Cambridge. Permission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Every reasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included, the publisher will be pleased to make amends at the earliest possible opportunity. Question 14 Part Mark Answer Further Information 2Any two from metals conduct heat, non-metals do not metals conduct electricity, non-metals do not metals are strong, non-metals are not metals are hard, non-metals are not metals are ductile, non-metals are not metals have a high density, non-metals do not metals are malleable, non-metals are not metals are flexible, non-metals are not metals are sonorous, non-metals are notanswers must refer to both metals and non-metals Accept comparisons, e.g. metals are better heat conductors than non-metals Total 2 Question 15 Part Mark Answer Further Information (a)1 SaturnAccept other indication of correct answer but circle takes precedence more than one answer circled = 0 marks (b)1 MercuryAccept other indication of correct answer but circle takes precedence more than one answer circled = 0 marks (c) (i)1 230 NAccept other indication of correct answer but circle takes precedence more than one answer circled = 0 marks (ii)1 50 (kg) Total 4