Physics > GCSE MARK SCHEME > Mark Scheme (Provisional) Summer 2021 Pearson Edexcel International GCSE In Physics (4PH1) Paper 1P (All)
Mark Scheme (Provisional) Summer 2021 Pearson Edexcel International GCSE In Physics (4PH1) Paper 1P and Science (Double Award) (4SD0) Paper 1P
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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://britishstudentroom.wordpress.com/Question number Answer Notes Marks 4 (a) (i) use of acceleration = change in velocity / time; seen anywhere in working allow clear indication that acceleration is gradient 3 substitution; evaluation; ignore minus sign e.g. acceleration = change in velocity / time acceleration = (-)30 / 6.2 (acceleration =) (-)4.8 (m/s2) allow (-)4.8 to (-)5.0 (m/s2) (ii) clear indication that distance is area under line; 3 understanding braking distance is area of triangle section only; evaluation; 54 (m) = 1 mark 147 (m) = 2 marks e.g. distance = area distance = 0.5 × 30 × 6.2 (distance =) 93 (m) accept alternative method using ecf answer from (a)(i) [Show More]
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