Cambridge IGCSE Science - Combined 0653 — 2022 Oct/Nov Paper 2 · Variant 3

This document has 16 pages. Any blank pages are indicated. IB22 11_0653_23/2RP © UCLES 2022 [Turn over *6478710885* Cambridge IGCSE™ COMBINED SCIENCE 0653/23 Paper 2 Multiple Choice (Extended) October/November 2022 45 minutes You must answer on the multiple choice answer sheet. You will need: Multiple choice answer sheet Soft clean eraser Soft pencil (type B or HB is recommended) INSTRUCTIONS  There are forty questions on this paper. Answer all questions.  For each question there are four possible answers A, B, C and D. Choose the one you consider correct and record your choice in soft pencil on the multiple choice answer sheet.  Follow the instructions on the multiple choice answer sheet.  Write in soft pencil.  Write your name, centre number and candidate number on the multiple choice answer sheet in the spaces provided unless this has been done for you.  Do not use correction fluid.  Do not write on any bar codes.  You may use a calculator. INFORMATION  The total mark for this paper is 40.  Each correct answer will score one mark.  Any rough working should be done on this question paper.  The Periodic Table is printed in the question paper.

2 © UCLES 2022 0653/23/O/N/22 1 What are characteristics of all living organisms? A breathing, excretion, nutrition B excretion, growth, nutrition C reproduction, respiration, germination D secretion, growth, sensitivity 2 Which row describes a correct structural adaptation for red blood cells and for cells lining the trachea? red blood cells cells lining the trachea A nucleus absent cilia present B nucleus present cilia present C nucleus absent small surface area D nucleus present small surface area 3 From which kind of molecule are enzymes made? A glucose B glycogen C fat D protein 4 A student investigates the effect of changing the light intensity on the rate of photosynthesis. Which environmental conditions need to be kept constant in this investigation? A carbon dioxide concentration, light intensity and temperature B carbon dioxide concentration and temperature only C carbon dioxide concentration and light intensity only D light intensity and temperature only 5 Which condition is caused by a lack of vitamin D? A anaemia B constipation C rickets D scurvy

3 © UCLES 2022 0653/23/O/N/22 [Turn over 6 Which statement about digestion is correct? A Chemical digestion occurs in the liver. B Chemical digestion only occurs in the mouth. C Mechanical digestion occurs in the large intestine. D Mechanical digestion occurs in the mouth and stomach. 7 Which row shows the conditions that lead to the slowest rate of transpiration of a plant? humidity of air / % temperature of air / C A 30 10 B 70 20 C 30 20 D 70 10 8 The diagram shows a section through the heart. valve 1 valve 2 valve 3 valve 4 When valve 1 is open, which other valves are open and which are closed? valve 2 valve 3 valve 4 A closed closed open B closed open closed C open closed open D open open closed

4 © UCLES 2022 0653/23/O/N/22 9 The diagram shows the cross-section of an alveolus in the lung. blood flow blood flow air flow Y Z X Which statement is correct? A Carbon dioxide levels are higher at Z than at X. B Carbon dioxide levels are higher at X than at Y. C Carbon dioxide moves by diffusion from Y into the blood. D Carbon dioxide moves by osmosis from the blood into Y. 10 What is the word equation for aerobic respiration? A carbon dioxide + chlorophyll  glucose + oxygen B carbon dioxide + glucose  oxygen + water C glucose + oxygen  carbon dioxide + water D oxygen + light energy  carbon dioxide + water 11 How does the body respond to being frightened? decreased blood glucose concentration increased breathing rate increased pulse rate widened pupils A     B     C     D    

5 © UCLES 2022 0653/23/O/N/22 [Turn over 12 Light shines on a shoot tip from the direction shown. X Y light After three days, the shoot tip has bent towards the light. What is the reason for this change? A Auxin moves away from the light causing cell elongation in area Y. B Auxin moves away from the light preventing cell elongation in area Y. C Auxin moves towards the light causing cell elongation in area X. D Auxin moves towards the light preventing cell elongation in area X. 13 The diagram shows the human male reproductive system. Which label is correct? D urethra transports sperm A prostate gland produces sperm B scrotum keeps testis at body temperature C testis produces gametes

6 © UCLES 2022 0653/23/O/N/22 14 A sodium atom is represented by Na. 23 11 Which row shows the number of electrons, protons and neutrons in this atom? electrons protons neutrons A 10 11 12 B 11 11 12 C 11 12 11 D 12 12 23 15 Which dot-and-cross diagram represents the bonding in a molecule of nitrogen? N A N N B N N C N N D N 16 Dilute hydrochloric acid reacts with aqueous sodium carbonate to form sodium chloride, carbon dioxide and water. What is the ionic equation for this reaction? A CO3 2–(aq) + 2H+(aq)  CO2(g) + H2O(l) B CO3 2–(aq) + 2Na+(aq) + 2H+(aq) + 2Cl –(aq)  2Na+(aq) + 2Cl –(aq) C Cl –(aq) + Na+(aq)  NaCl (aq) D Na2CO3(aq) + 2HCl (aq)  2NaCl (aq) + CO2(g) + H2O(l) 17 Concentrated aqueous sodium chloride is electrolysed using inert electrodes. Which statement about this process is correct? A Chloride ions lose electrons at the cathode. B Hydrogen ions gain electrons at the cathode. C Oxide ions lose electrons at the anode. D Sodium ions gain electrons at the anode.

7 © UCLES 2022 0653/23/O/N/22 [Turn over 18 Excess limestone is added to 50 cm3 1 mol / dm3 hydrochloric acid. The volume of gas produced is measured over time. The results produce line X on the graph. Which line is produced when excess limestone is added to 50 cm3 0.5 mol / dm3 hydrochloric acid at the same temperature? volume of gas time 0 0 A X B D C 19 The word equation represents the reaction between substance J and hydrochloric acid. substance J + hydrochloric acid  magnesium chloride + hydrogen What is substance J? A magnesium B magnesium carbonate C magnesium hydroxide D magnesium oxide 20 Which pair of gases can be identified using damp litmus paper and limewater? A carbon dioxide and hydrogen B chlorine and carbon dioxide C chlorine and oxygen D hydrogen and chlorine

8 © UCLES 2022 0653/23/O/N/22 21 Fluorine is at the top of Group VII in the Periodic Table. Which statements about fluorine are correct? 1 It is a solid at room temperature. 2 It has a dark colour. 3 It is a very reactive element. 4 It exists as diatomic molecules. A 1 and 2 B 1 and 3 C 2 and 4 D 3 and 4 22 What are properties of transition elements? 1 They can act as catalysts. 2 They form coloured compounds. 3 They have high densities. A 1 and 2 only B 1 and 3 only C 2 and 3 only D 1, 2 and 3 23 Iron is extracted from iron ore in a blast furnace. Which substance is not one of the reactants added to the blast furnace? A carbon B carbon dioxide C hematite D oxygen 24 Which statements about clean air are correct? 1 It consists of 78% nitrogen. 2 It contains a small amount of argon. 3 It contains a small amount of carbon monoxide. 4 It is mostly a compound of nitrogen and oxygen. A 1 and 2 B 1 and 4 C 2 and 3 D 3 and 4

9 © UCLES 2022 0653/23/O/N/22 [Turn over 25 Petroleum is separated into fractions by fractional distillation. Which row describes the properties of the molecules in a single fraction? boiling points of the molecules number of carbon atoms in the molecules A same same B same similar C similar same D similar similar 26 The formula of the hydrocarbon octane is C8H18. What are the products of the complete combustion of octane? A carbon and hydrogen B carbon and water C carbon dioxide and water D carbon monoxide and water 27 Which process is an example of thermal decomposition? A cracking an alkane B electrolysis of molten lead(II) bromide C extraction of iron in the blast furnace D fractional distillation of petroleum

10 © UCLES 2022 0653/23/O/N/22 28 The diagrams show two distance–time graphs and two speed–time graphs. Which graph represents the motion of an object that is moving with a constant acceleration that is greater than zero? A distance time 0 0 B distance time 0 0 C speed time 0 0 D speed time 0 0 29 A man has a mass of 76 kg and an average density of 950 kg / m3. The man steps into a bath that is completely full of water. Water spills over the edge of the bath as the man lies down slowly and becomes completely submerged. What is the volume of water that spills over the edge of the bath? A 0.072 m3 B 0.080 m3 C 12.5 m3 D 72.2 m3 30 An aircraft is flying forwards at a steady speed in a straight line. Which statement about the resultant force on the aircraft is correct? A The resultant force is a backwards force caused by air resistance. B The resultant force is a forwards force caused by the engines. C The resultant force is a downwards force caused by the weight of the aircraft. D The resultant force is zero because all the forces on the aircraft cancel.

11 © UCLES 2022 0653/23/O/N/22 [Turn over 31 A piece of scientific equipment is taken from the Earth to a distant planet. Which row describes the properties of the equipment on the distant planet? mass weight A   key B    = the same as on Earth C    = different on each planet D   32 A liquid in a beaker evaporates as air moves over it. liquid movement of air Which change increases the rate of evaporation? A decreasing the speed of the air over the beaker B decreasing the temperature of the liquid in the beaker C increasing the quantity of liquid in the beaker D increasing the width of the beaker 33 A hot object is placed in a vacuum. It loses thermal energy by radiation. What is this radiation? A infrared waves B microwaves C ultraviolet waves D X-rays 34 The crests of a wave on the sea reach the beach at a rate of 6.0 crests every 60 seconds. The distance between one crest and the next is 20 m. What is the speed of the wave? A 0.30 m / s B 2.0 m / s C 120 m / s D 200 m / s

12 © UCLES 2022 0653/23/O/N/22 35 Sound travels at different speeds in different substances. What are possible values for the speed of sound in air, in water and in steel? s / m air in speed s / m water in speed s / m steel in speed A 330 6000 1500 B 330 1500 6000 C 6000 1500 330 D 6000 330 1500 36 In which circuit is there a current of 2.0 A? A 1.5 V 0.50
B 0.50 V 1.5
C 3.0 V 6.0
D 6.0 V 3.0
37 The resistance of a wire depends on its length and on its diameter. Which row shows two changes that both increase the resistance of the wire? change to length change to diameter A decrease decrease B decrease increase C increase decrease D increase increase 38 A resistor of resistance 30  and a resistor of resistance 60  are connected in parallel. What is their combined resistance? A 0.050  B 20  C 45  D 90 

13 © UCLES 2022 0653/23/O/N/22 39 A 20 V power supply provides a current of 5.0 A for 1.0 minute. How much energy does the power supply transfer? A 4.0 J B 100 J C 240 J D 6000 J 40 Why is the electricity supply to a mains circuit fitted with a fuse? A to increase the current in the circuit B to increase the resistance of the circuit C to maintain a constant current in the circuit D to prevent overheating of the cables in the circuit

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16 © UCLES 2022 0653/23/O/N/22 Group The Periodic Table of Elements 1 H hydrogen 1 2 He helium 4 I II III IV V VI VII VIII 3 Li lithium 7 4 Be beryllium 9 atomic number atomic symbol Key name relative atomic mass 11 Na sodium 23 12 Mg magnesium 24 19 K potassium 39 20 Ca calcium 40 37 Rb rubidium 85 38 Sr strontium 88 55 Cs caesium 133 56 Ba barium 137 87 Fr francium – 88 Ra radium – 5 B boron 11 13 Al aluminium 27 31 Ga gallium 70 49 In indium 115 81 Tl thallium 204 6 C carbon 12 14 Si silicon 28 32 Ge germanium 73 50 Sn tin 119 82 Pb lead 207 22 Ti titanium 48 40 Zr zirconium 91 72 Hf hafnium 178 104 Rf rutherfordium – 23 V vanadium 51 41 Nb niobium 93 73 Ta tantalum 181 105 Db dubnium – 24 Cr chromium 52 42 Mo molybdenum 96 74 W tungsten 184 106 Sg seaborgium – 25 Mn manganese 55 43 Tc technetium – 75 Re rhenium 186 107 Bh bohrium – 26 Fe iron 56 44 Ru ruthenium 101 76 Os osmium 190 108 Hs hassium – 27 Co cobalt 59 45 Rh rhodium 103 77 Ir iridium 192 109 Mt meitnerium – 28 Ni nickel 59 46 Pd palladium 106 78 Pt platinum 195 110 Ds darmstadtium – 29 Cu copper 64 47 Ag silver 108 79 Au gold 197 111 Rg roentgenium – 30 Zn zinc 65 48 Cd cadmium 112 80 Hg mercury 201 112 Cn copernicium – 114 Fl flerovium – 116 Lv livermorium – 7 N nitrogen 14 15 P phosphorus 31 33 As arsenic 75 51 Sb antimony 122 83 Bi bismuth 209 8 O oxygen 16 16 S sulfur 32 34 Se selenium 79 52 Te tellurium 128 84 Po polonium – 9 F fluorine 19 17 Cl chlorine 35.5 35 Br bromine 80 53 I iodine 127 85 At astatine – 10 Ne neon 20 18 Ar argon 40 36 Kr krypton 84 54 Xe xenon 131 86 Rn radon – 21 Sc scandium 45 39 Y yttrium 89 57–71 lanthanoids 89–103 actinoids 57 La lanthanum 139 89 Ac lanthanoids actinoids The volume of one mole of any gas is 24 dm3 at room temperature and pressure (r.t.p.). actinium – 58 Ce cerium 140 90 Th thorium 232 59 Pr praseodymium 141 91 Pa protactinium 231 60 Nd neodymium 144 92 U uranium 238 61 Pm promethium – 93 Np neptunium – 62 Sm samarium 150 94 Pu plutonium – 63 Eu europium 152 95 Am americium – 64 Gd gadolinium 157 96 Cm curium – 65 Tb terbium 159 97 Bk berkelium – 66 Dy dysprosium 163 98 Cf californium – 67 Ho holmium 165 99 Es einsteinium – 68 Er erbium 167 100 Fm fermium – 69 Tm thulium 169 101 Md mendelevium – 70 Yb ytterbium 173 102 No nobelium – 71 Lu lutetium 175 103 Lr lawrencium –

This document consists of 3 printed pages. © UCLES 2022 [Turn over Cambridge IGCSE™ COMBINED SCIENCE 0653/23 Paper 2 Multiple Choice (Extended) October/November 2022 MARK SCHEME Maximum Mark: 40 Published This mark scheme is published as an aid to teachers and candidates, to indicate the requirements of the examination. Mark schemes should be read in conjunction with the question paper and the Principal Examiner Report for Teachers. Cambridge International will not enter into discussions about these mark schemes. Cambridge International is publishing the mark schemes for the October/November 2022 series for most Cambridge IGCSE™, Cambridge International A and AS Level components and some Cambridge O Level components.

0653/23 Cambridge IGCSE – Mark Scheme PUBLISHED October/November 2022 © UCLES 2022 Page 2 of 3 Question Answer Marks 1 B 1 2 A 1 3 D 1 4 B 1 5 C 1 6 D 1 7 D 1 8 A 1 9 A 1 10 C 1 11 B 1 12 A 1 13 C 1 14 B 1 15 B 1 16 A 1 17 B 1 18 D 1 19 A 1 20 B 1 21 D 1 22 D 1 23 B 1 24 A 1 25 D 1 26 C 1 27 A 1 28 C 1

0653/23 Cambridge IGCSE – Mark Scheme PUBLISHED October/November 2022 © UCLES 2022 Page 3 of 3 Question Answer Marks 29 B 1 30 D 1 31 B 1 32 D 1 33 A 1 34 B 1 35 B 1 36 A 1 37 C 1 38 B 1 39 D 1 40 D 1