[PDF] Cambridge Primary Checkpoint - Science (0846) October 2017 Paper 2 Mark Scheme.pdf | Plain Text

This document consists of 11 printed pages and 1 blank page. IB17 10_0846_02/5RP © UCLES 2017 [Turn over Cambridge International Examinations Cambridge Primary Checkpoint SCIENCE 0846/02 Paper 2 October 2017 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.

0846/02 Primary Checkpoint Science – Mark Scheme October 2017 PUBLISHED © UCLES 2017 Page 2 of 12 Annotations and abbreviations / OR alternate responses for the same marking point ( ) the words or units in brackets do not need to 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

0846/02 Primary Checkpoint Science – Mark Scheme October 2017 PUBLISHED © UCLES 2017 Page 3 of 12 Question Answer Marks Further Information 1(a) algae  fish  squid  shark 1all correct = 1 mark 1(b) marine / sea / water / ocean 1 Question Answer Marks Further Information 2 chalk and water test-tube filtrate filter funnelfilter paper 3five correct = 3 marks three or four correct = 2 marks one or two correct = 1 mark

0846/02 Primary Checkpoint Science – Mark Scheme October 2017 PUBLISHED © UCLES 2017 Page 4 of 12 Question Answer Marks Further Information 3(a) friction 1Accept air resistance 3(b) backwards forwards no direction no force same 1more than one answer circled = 0 marks Question Answer Marks Further Information 4(a) eating sandwiches fishing spilling waste oil throwing stones in the river walking near the river 1more than one answer circled = 0 marks 4(b) 1 2 3 4 5 1more than one answer circled = 0 marks 4(c) fewer trees cut down / less deforestation / less energy to make new paper 1Accept saves trees

0846/02 Primary Checkpoint Science – Mark Scheme October 2017 PUBLISHED © UCLES 2017 Page 5 of 12 Question Answer Marks Further Information 5(a) More than one lamp is needed. More than one switch is needed. The cell is the wrong way round. The circuit is not complete.  The switch must be open. 1more than one tick = 0 marks 5(b) 1Accept any correct indication of the open switch more than one symbol circled = 0 marks Question Answer Marks Further Information 6(a) brain 1 6(b) small intestine(s) 1Do not accept large intestines 6(c) C D E F 1more than one answer circled = 0 marks

0846/02 Primary Checkpoint Science – Mark Scheme October 2017 PUBLISHED © UCLES 2017 Page 6 of 12 Question Answer Marks Further Information 7 (idea of) reducing safety risk / to stop the liquid from catching alight 1Accept liquid is flammable / liquid may catch fire Ignore it is safer Question Answer Marks Further Information 8 The Sun appears to rise in the east. The Sun appears to go down in the west . The Earth spins on its own axis . The Earth rotates once every day . 4each correct answer = 1 mark Question Answer Marks Further Information 9(a) steel 1more than one answer = 0 marks 9(b) salt 1more than one answer = 0 marks 9(c) gasoline 1more than one answer = 0 marks

0846/02 Primary Checkpoint Science – Mark Scheme October 2017 PUBLISHED © UCLES 2017 Page 7 of 12 Question Answer Marks Further Information 10 1 heart 2 brain 3 kidney 4 lung 5 stomach / small intestine 3five correct = 3 marks three or four correct = 2 mark one or two correct = 1 mark Do not accept large intestine(s) Ignore intestine(s) Question Answer Marks Further Information 11(a) fair test 1Accept so the results can be compared Do not accept for reliability / accuracy Ignore (just) to make it fair / equal 11(b) As the temperature increases the height of the plant increases / gets bigger / goes up. 1 11(c) any number less than 6 (cm) 1

0846/02 Primary Checkpoint Science – Mark Scheme October 2017 PUBLISHED © UCLES 2017 Page 8 of 12 Question Answer Marks Further Information 12(a) absorbed blocked coloured reflected refracted 1more than one answer circled = 0 marks 12(b) light bounces off our eyes light enters our eyes light is blocked by our eyes light leaves our eyes light reflects from our eyes 1more than one answer circled = 0 marks 12(c) the pot is heavy the pot is opaque the pot is tall the pot is transparent the pot is wide 1more than one answer circled = 0 marks

0846/02 Primary Checkpoint Science – Mark Scheme October 2017 PUBLISHED © UCLES 2017 Page 9 of 12 Question Answer Marks Further Information 13(a) force length size temperature volume 1more than one answer circled = 0 marks 13(b) measuring cylinder 1Do not accept measuring cup / beaker 13(c) (no) glass E has the least water / less water = 1 mark glass E has the highest pitch / higher pitch = 1 mark or glass A has the most water / more water = 1 mark glass A is the lowest pitch / a lower pitch = 1 mark 2no mark for no but answer must be no for marks to be awarded statements must be comparative the glass with the least water has the highest pitch = 2 marks the glass with the most water has the lowest pitch = 2 marks

0846/02 Primary Checkpoint Science – Mark Scheme October 2017 PUBLISHED © UCLES 2017 Page 10 of 12 Question Answer Marks Further Information 14(a) A 1 14(b) B 1 14(c) idea that process cannot be changed back / cannot get original materials back / cannot be changed back to its original form 1Accept a change that is permanent Question Answer Marks Further Information 15(a) the coat hanger is made of metal the coat hanger vibrates the string is a solid the string is short he is leaning over the chair 1more than one answer circled = 0 marks 15(b) hit the coat hanger harder 1Accept make the coat hanger vibrate more 15(c) quieter / less / softer / smaller sound travels better through metal or solid / sound does not travel as well through the air or gas 2each correct answer = 1 mark answer must be comparative

0846/02 Primary Checkpoint – Mark Scheme October 2017 PUBLISHED © UCLES 2017 Page 11 of 12 Question Answer Marks Further Information 16(a) Ahmed any one from the speed of the fan/wind can be controlled it might be too windy it might not be windy wind speed cannot be controlled outside (idea) of not being able to control factors outside wind could take seed too far for measurement 1Hassan or no name = 0 marks Accept factors that cannot be controlled e.g. rain, bird eating seed 16(b) Green seeds will travel further than black seeds. The heavier the seed the further the seed will travel. The slower the wind the further the seed will travel. The stronger the wind the further the seed will travel. The wind speed will not affect how far the seed will travel. 1more than one circled = 0 marks 16(c) for reliability / to make sure the investigation is reliable 1Accept to make sure the results are correct / to get an average Do not accept fair test / for accuracy

0846/02 Primary Checkpoint Science – Mark Scheme October 2017 PUBLISHED © UCLES 2017 Page 12 of 12 Question Answer Marks Further Information 17(a) A 1 17(b) A (on heating) gives a white solid 2 Accept leaves salt Do not accept stays a white solid 17(c) melting point above room temperature / the melting point is 52 (°C) / it hasn’t reached the melting point / it is below its melting point 1Accept the freezing point is 52 (°C) / it does not melt at room temperature