Physics > GCSE MARK SCHEME > Mark Scheme (Results) January 2021 Pearson Edexcel International GCSE In Physics (4PH1) Paper 1PR an (All)
Mark Scheme (Results) January 2021 Pearson Edexcel International GCSE In Physics (4PH1) Paper 1PR and Science (Double Award) (4SD0) Paper 1PR
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Question number Answer Notes Marks 1 (a) -1 for each additional line 4 (b) (i) A - electrical; 1 (ii) B - light radiation; 1 (Total for Question 1 = 6 marks)Question number Answer Notes Marks 2... (a) thermometer part of spectrum P infrared; Q red R green / yellow; S violet T ultraviolet; allow all valid colours/ visible 3 (b) any reference to absorption; allow reference to reflection 2 black is the better/best/good absorber; allow reference to ‘poor reflector’ (c) infrared/IR; 1 (Total for Question 2 = 6 marks)Question number Answer Notes Marks 3 (a) planet; 1 (b) comet; accept planet 1 (c) substitution into given formula; 3 conversion of 35 days into seconds; evaluation; allow full credit for 2.6927937 × 1010 if unit changed to m/day. e.g. v = 2 × π × 1.5 × 1011/(35 × 24 × 60 × 60) v = 310 000 m/s 311665.93(7)8 Answer for incorrect/no conversion of days→ seconds 2.69etc x 1010 scores 2 -1 for POT error (Total for Question 3 = 5 marks) [Show More]
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