Science Stage 9 Paper 1 Cambridge Lower Secondary Progression Test Mark Scheme 3146_01_MS_6RP © UCLES 2024 2024 S9/01 Science Stage 9 Paper 1 Mark Scheme 2024 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 underline exact word is required 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. Note provides extra information when necessary 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 © UCLES 2024 Page 2 of 12 S9/01 Science Stage 9 Paper 1 Mark Scheme Question 1(a) Answer 2024 Marks Further Information 3 all five correct = 3 marks (A) kidney (B) ureter three or four correct = 2 marks (C) bladder one or two correct = 1 mark (D) urethra (E) (renal) artery 1(b) protein(s) Question 2(a) 1 Answer Marks 10 Further Information 1 2 each correct answer = 1 mark 2(b) (type of bonding) covalent (bonding) (explanation) a pair of electrons shared (by two atoms) 2(c) any one from Accept two electrons that are shared 1 low melting point low boiling point gas at room temperature Accept poor conductor of electricity or does not conduct electricity or can flow easily or has a low density © UCLES 2024 Page 3 of 12 S9/01 Science Stage 9 Paper 1 Mark Scheme Question 3 Answer 2024 Marks evaporation Further Information 1 Accept endothermic Ignore perspiration Question 4(a) Answer Marks label the arrow from carbon dioxide in the air to carbon compounds in plants with the letter P Further Information 1 2 each correct answer = 1 mark 4(b) (process A) combustion Accept burning (process B) feeding Accept eating Ignore nutrition or taking in nutrients Question 5(a) Answer Marks displacement Further Information 1 Ignore chemical 2 each correct answer = 1 mark 5(b) copper Note answers can be given in either order magnesium sulfate 5(c) zinc is less reactive than magnesium 1 Accept ora Accept zinc is lower down the reactivity series than magnesium © UCLES 2024 Page 4 of 12 S9/01 Science Stage 9 Paper 1 Mark Scheme Question Answer Marks 3.00 6(a) 2024 Further Information 2 labelling of x-axis and labelling of y-axis = 1 mark 2.90 mass of fetus in kg 2.80 all points correctly plotted ± 2.70 1 mark 2.60 1 2 small square = Accept plots with small x, dot, or dot with circle 2.50 2.40 2.30 35 36 37 38 39 40 age of fetus in weeks 6(b) point at (38, 2.6) circled 1 Accept any indication of anomalous plot, e.g. circle on table of results, but answer on graph takes precedence Accept ecf on plotting from part (a) 6(c) 3.00 1 Accept ecf on plotting from part (a) 2.90 Accept ecf on plotting from part (b) 2.80 Do not accept dot to dot 2.70 Note line of best fit judged by eye and does not consider the anomalous result 2.60 2.50 2.40 2.30 35 © UCLES 2024 36 37 38 39 40 Page 5 of 12 S9/01 Science Stage 9 Paper 1 Mark Scheme Question Answer 2024 Marks 7(a) Further Information 1 arrow drawn vertically from x-axis to the crest of waveform or arrow drawn vertically from x-axis to the trough of waveform 7(b) high pitch sound has higher frequency (than low pitch sound) 1 Accept ora Accept the frequency decreases 7(c) © UCLES 2024 amplitude 1 Page 6 of 12 S9/01 Science Stage 9 Paper 1 Mark Scheme Question Answer 2024 Marks 8 Further Information 2 each correct answer = 1 mark (idea that) these continents were once joined together Accept (idea of) continental drift (idea that) continents moved apart due to movement of plates or moved apart due to plate tectonics Question 9 Answer Marks D E (B) A C Further Information 2 DE in correct order = 1 mark AC in correct order = 1 mark Question Answer Marks Further Information 10(a) decreases 1 10(b) 98 1 Accept answers in the range 80–120 © UCLES 2024 Page 7 of 12 S9/01 Science Stage 9 Paper 1 Mark Scheme Question Answer 2024 Marks 11(a) Further Information 3 any complete circuit drawn with at least one component and no gaps = 1 mark correct symbol for a battery of cells and closed switch = 1 mark Do not accept open switch A correct symbol for lamps in parallel and correct symbol for ammeter in series with one lamp = 1 mark Ignore junction of conductor symbols 11(b) in a series circuit the lamps are less bright 1 Accept ora Note answer must be comparative Question Answer Marks 12 3 each correct answer = 1 mark dust and gas Accept dust and gas in either order stars © UCLES 2024 Further Information Page 8 of 12 S9/01 Science Stage 9 Paper 1 Mark Scheme Question 13(a) Answer 2024 Marks height or size or mass or fur colour Further Information 1 Accept fur thickness or antlers Ignore age 13(b) 2 all three correct = 2 marks statement about natural selection © UCLES 2024 letter Some adaptations are advantageous in one environment and not in another. R Genes controlling features which help survival pass into offspring. S Individuals with adaptations less advantageous to the environment die before they reproduce. R Page 9 of 12 one or two correct = 1 mark S9/01 Science Stage 9 Paper 1 Mark Scheme Question 14(a) Answer 2024 Marks as the temperature increases the reaction time decreases Further Information 1 Accept ora 14(b) 3 each correct answer = 1 mark Accept more particles in the same volume (prediction) as the concentration increases the reaction time decreases or as the concentration increases the rate increases (explanation) (as concentration increases) there are more particles per unit volume or particles are more crowded or particles are closer together more collisions Accept more frequent collisions or more chance of collision or collisions more often or more collisions per second = 2 marks Do not accept particles have more energy or particles are moving faster Ignore references to successful collisions Question 15 Answer Marks Further Information 1 more than one box ticked = 0 marks 3rd box ticked Accept any indication of the correct answer, e.g. circling or underlining, but ticking takes precedence © UCLES 2024 Page 10 of 12 S9/01 Science Stage 9 Paper 1 Mark Scheme Question 16 Answer 2024 Marks Further Information 2 each correct answer = 1 mark any two from sea levels rise or sea levels change flooding drought extreme weather events Accept other suitable impacts of climate change Question Answer Marks 17(a) Further Information 2 each correct answer = 1 mark (materials) plastic and wood both materials needed either order for the mark (explanation) less dense than water 17(b) Note explanation marking point is independent of materials 1 more than one answer circled = 0 marks 1030 kg / m3 Accept any indication of the correct answer, e.g. ticking or underlining, but circling takes precedence 17(c) © UCLES 2024 37(.0) (cm3) 1 Page 11 of 12 S9/01 © UCLES 2024 Science Stage 9 Paper 1 Mark Scheme BLANK PAGE Page 12 of 12 2024
