Pearson Edexcel International GCSE In Physics (4PH1) Paper 1P and Science (Double Award) (4SD0) Paper 1P..Mark Scheme (Provisional) Summer 2021

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General Marking Guidance • All candidates must receive the same treatment. Examiners must mark the first candidate in exactly the same way as they mark the last. • Mark schemes should be appli... ed positively. Candidates must be rewarded for what they have shown they can do rather than penalised for omissions. • Examiners should mark according to the mark scheme not according to their perception of where the grade boundaries may lie. • There is no ceiling on achievement. All marks on the mark scheme should be used appropriately. • All the marks on the mark scheme are designed to be awarded. Examiners should always award full marks if deserved, i.e. if the answer matches the mark scheme. Examiners should also be prepared to award zero marks if the candidate’s response is not worthy of credit according to the mark scheme. • Where some judgement is required, mark schemes will provide the principles by which marks will be awarded and exemplification may be limited. • When examiners are in doubt regarding the application of the mark scheme to a candidate’s response, the team leader must be consulted. • Crossed out work should be marked UNLESS the candidate has replaced it with an alternative response. http://britishstudentroom.wordpress.com/Question number Answer Notes Marks 1 (a) (i) C (white); 1 A is incorrect because its temperature is the second lowest B is incorrect because its temperature is the lowest D is incorrect because its temperature is the second highest (ii) D (white dwarf); 1 A is incorrect because the Sun is not massive enough to form a black hole B is incorrect because the Sun is not massive enough to form a neutron star C is incorrect because the Sun is not massive enough to form a supernova (iii) C (supernova); 1 A is incorrect because this is during the middle of the life cycle B is incorrect because this is an early stage of the life cycle D is incorrect because this is a late stage in the life cycle of stars like our Sun (b) arrow pointing from the comet to the star; accept any arrow pointing from comet to star within shaded area ignore starting position of arrow 2 force labelled ‘gravitational’; allow ‘gravity’ or ‘weight’ Total for Question 1 = 5 marks http://britishstudentroom.wordpress.com/Question number Answer Notes Marks 2 (a) (plotting) compass(es); allow suspended magnet, magnetometer allow higher level responses e.g. Hall probe, search coil 1 (b) one mark for each correct indication;;; 2 marks max. if more than three indications given 3 (c) any two from: 2 difficult to magnetise; allow idea of taking a long time to magnetise difficult to demagnetise; allow idea of taking a long time to demagnetise idea that it retains its magnetism; Total for Question 2 = 6 marks http://britishstudentroom.wordpress.com/Question number Answer Notes Marks 3 (a) (i) neutron; 1 (ii) nucleus/nuclei splitting; condone nucleus/nuclei breaking apart 2 releasing (two) daughter nuclei / neutrons / energy; ignore daughter cells allow smaller/lighter nuclei for daughter nuclei (iii) neutrons released (by fission) are absorbed by other (uranium) nuclei; condone atoms for nuclei 2 causing fission/splitting in other (uranium) nuclei; condone atoms for nuclei (b) concrete / lead / (thick) steel; 1 (c) graphite; 4 slow; boron; absorb; Total for Question 3 = 10 marks http://britishstud [Show More]

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