Cambridge IGCSE Science - Combined 0653 — 2009 May/June Paper 3 · Variant 1

This document consists of 21 printed pages and 3 blank pages. IB09 06_0653_03/3RP © UCLES 2009 [Turn over *4294525647* For Examiner's Use 1 2 3 4 5 6 7 8 9 Total UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certificate of Secondary Education COMBINED SCIENCE 0653/03 Paper 3 (Extended) May/June 2009 1 hour 15 minutes Candidates answer on the Question Paper. No Additional Materials are required. READ THESE INSTRUCTIONS FIRST Write your Centre number, candidate number and name on all the work you hand in. Write in dark blue or black pen. You may use a soft pencil for any diagrams, graphs, tables or rough working. Do not use staples, paper clips, highlighters, glue or correction fluid. DO NOT WRITE IN ANY BARCODES. Answer all questions. A copy of the Periodic Table is printed on page 24. At the end of the examination, fasten all your work securely together. The number of marks is given in brackets [ ] at the end of each question or part question. www.XtremePapers.com

2 © UCLES 2009 0653/03/M/J/09 For Examiner's Use 1 Fig. 1.1 shows part of the human digestive system. pancreas Fig. 1.1 (a) On Fig. 1.1, use a label line and a letter to indicate each of the following parts. A the liver B a region where amylase breaks down starch C a region where protease breaks down proteins [3] (b) The pancreas produces several enzymes, including lipase. Describe the function of lipase. [2] (c) The pancreas also produces the hormone insulin. (i) State the conditions that stimulate the pancreas to produce insulin. [1] (ii) Describe the effect of insulin on the liver. [1]

3 © UCLES 2009 0653/03/M/J/09 [Turn over For Examiner's Use (d) Digested food is absorbed in the small intestine, and dissolves in the liquid part of the blood in the capillaries in the intestine walls. It is then transported in a vein to the liver. (i) What is the name for the liquid part of blood? [1] (ii) Describe one difference between the structure of a vein and of an artery, and give the reason for this difference. difference reason [2]

4 © UCLES 2009 0653/03/M/J/09 For Examiner's Use 2 The Vikings, who lived in Scandinavia about 1200 years ago, sailed in boats called longships across the sea to Britain. (a) (i) They travelled 900 km in 150 hours. Calculate their average speed for this journey. State the formula that you use and show your working. formula working [2] (ii) At one stage on their journey they were travelling at 5 km / h. Calculate their speed in m / s. Show your working. [1] (b) At one point in the journey, the longship accelerated at 0.1 m / s2. The mass of the longship was 8000 kg. Calculate the force required to produce this acceleration. State the formula that you use and show your working. formula working [2]

5 © UCLES 2009 0653/03/M/J/09 [Turn over For Examiner's Use (c) The volume of the wood used to construct the longship was 9 m3. If the density of the wood was 800 kg / m3, calculate the mass of the wood used. State the formula that you use and show your working. formula working [2]

6 © UCLES 2009 0653/03/M/J/09 For Examiner's Use 3 (a) The names of six elements are shown below. carbon chlorine copper neon silicon sodium Choose the element from the list which is a very reactive non-metal, which forms a green chloride, whose atoms have all of their electron energy levels filled. [3] (b) Fig. 3.1 shows diagrams of a sodium ion and an oxide ion. (i) Complete the boxes in the left hand column to show a sodium atom and an oxygen atom. sodium ion oxide ion sodium atom oxygen atom Fig. 3.1 [2] (ii) Explain why a sodium ion has an electrical charge of 1+. [1]

7 © UCLES 2009 0653/03/M/J/09 [Turn over For Examiner's Use (c) Fig. 3.2 shows apparatus a student used to investigate the combustion of hydrogen. pump draws gases through apparatus liquid collecting inside the U-tube U-tube hydrogen Fig. 3.2 (i) Write a word equation for the reaction which is occurring in the flame in Fig. 3.2. [1] (ii) After several minutes the student poured the liquid which had collected inside the U-tube into a beaker. Describe two observations which the student would make when she added a small piece of sodium to the liquid in the beaker. [2]

8 © UCLES 2009 0653/03/M/J/09 For Examiner's Use 4 Fig. 4.1 shows an arum lily. Arum lilies have flowers that are pollinated by insects. There are many tiny flowers on a stalk, inside a large white structure called a spathe. leaf flowers on stalk spathe Fig. 4.1 (a) (i) Name the part of the flower in which pollen is made. [1] (ii) What does a pollen grain contain? [1]

9 © UCLES 2009 0653/03/M/J/09 [Turn over For Examiner's Use (b) Arum lilies produce heat energy to raise the temperature of the flowers. This helps to attract insects to the flowers. A researcher investigated whether there was a relationship between the temperature of the flowers inside an arum lily spathe and the rate of oxygen use. He took 15 arum lilies, and measured the temperature and rate of oxygen use for each one. Fig. 4.2 shows his results. 0 5 10 15 20 25 temperature inside spathe / °C oxygen use / units per second 0.6 0.5 0.4 0.3 0.2 0.1 0 Fig. 4.2 (i) Describe the relationship between the temperature inside the spathe and the rate of oxygen use by the arum lily. [1] (ii) Suggest an explanation for this relationship. [2]

10 © UCLES 2009 0653/03/M/J/09 For Examiner's Use (c) The high temperature of the flowers inside the spathe of the lily, and the bright white of the spathe, each help to attract insects to the flowers. Insects are able to detect the electromagnetic radiation coming from the flowers and the spathe. (i) Name the type of electromagnetic radiation emitted by the flowers that are at a high temperature, the bright white spathe. [2] (ii) State one similarity between these two types of electromagnetic radiation. [1] (d) The leaves of arum lilies contain palisade cells, which are typical plant cells containing chloroplasts. In the space below, draw and label a diagram of a palisade cell. Include these structures in your labels: cell membrane cell wall chloroplast cytoplasm nucleus vacuole [4]

11 © UCLES 2009 0653/03/M/J/09 [Turn over For Examiner's Use 5 (a) Fig. 5.1 shows industrial apparatus used for the fractional distillation of petroleum (crude oil). 141 282 44 182 relative molecular mass of a typical molecule in the fraction Q R S fraction hot petroleum P Fig. 5.1 (i) Draw lines on Fig. 5.1 connecting the fractions P, Q, R and S to the relative molecular mass of a typical molecule in the fraction. The line for fraction Q has been drawn for you. [1] (ii) A hydrocarbon has a relative molecular mass of 58 and contains 10 hydrogen atoms per molecule. Deduce the number of carbon atoms in each molecule of this hydrocarbon. Use the Periodic Table on page 24 to find the relative atomic masses you need to answer this question. Show your working. [2]

12 © UCLES 2009 0653/03/M/J/09 For Examiner's Use (b) Fig. 5.2 shows the displayed formulae of four hydrocarbon molecules, L, M, N and O. Some of these molecules have been made by cracking hydrocarbons from petroleum. H C H H C H H C H H H H C H H C H C H H C C H H H H C H H M L H C H H C H C H H H C H H C H H C H H H C C H H H H C H H O N Fig. 5.2 (i) Describe briefly how the process of cracking is carried out. [2] (ii) Explain which of the hydrocarbons shown above react with bromine solution. Describe the colour change which is observed. [3]

13 0653/03/M/J/09 [Turn over BLANK PAGE Please turn over for Question 6.

14 © UCLES 2009 0653/03/M/J/09 For Examiner's Use 6 (a) A hotel has a lift (elevator). It moves through a vertical height of 3 m between each floor. Fig. 6.1 (i) A passenger travels in the lift. The passenger has a mass of 80 kg and weighs 800 N. The mass of the empty lift is 1200 kg. Calculate the total weight of the passenger and lift. Show your working. [1] (ii) Calculate the work done when the lift and passenger move up three floors, from Floor 1 to Floor 4. State the formula that you use and show your working. formula working [2]

15 © UCLES 2009 0653/03/M/J/09 [Turn over For Examiner's Use (iii) Calculate the power needed to move the lift and passenger up three floors from Floor 1 to Floor 4 in 20s. State the formula that you use and show your working. formula working [2] (b) The lights in a room are connected in parallel as shown in Fig. 6.2. power supply 2000 Ω 1000 Ω 1000 Ω Fig. 6.2 Calculate the combined resistance of these three lights. State the formula that you use and show your working. formula working [3]

16 © UCLES 2009 0653/03/M/J/09 For Examiner's Use 7 Read the following description of a food web. • Ants collect leaves from trees and take them into their nests. • A fungus grows on the leaves and breaks them down. • The ants eat the leaves, and also the fungus. • Small birds eat the ants, and hawks eat the small birds. • Pangolins eat only ants. a pangolin Fig. 7.1 (a) In the space below, complete a food web that includes all of the organisms described. leaves [2]

17 © UCLES 2009 0653/03/M/J/09 [Turn over For Examiner's Use (b) (i) Name the producer in this food web. [1] (ii) Name a decomposer in this food web. [1] (c) Using the idea of energy flow between trophic levels, explain why there are fewer hawks than small birds in an ecosystem. [2]

18 © UCLES 2009 0653/03/M/J/09 For Examiner's Use 8 Fig. 8.1 shows a room heated by a wall heater. wall heater Fig. 8.1 (a) (i) Name the method by which heat travels through the metal casing of the heater. [1] (ii) Name the method by which heat circulates around the room. [1] (iii) On Fig. 8.1 show, using arrows, how the heat circulates around the room from the heater. [1] (b) The heater is made of iron, a solid. It contains water, a liquid and air, a gas. Complete the diagrams in Fig. 8.2 to show the arrangement of particles in a solid, a liquid and a gas. One particle has been drawn for you on each diagram. solid liquid gas Fig. 8.2 [3]

19 © UCLES 2009 0653/03/M/J/09 [Turn over For Examiner's Use (c) Fig. 8.3 shows a man in a room looking into a mirror, as seen from above. mirror picture man Fig. 8.3 (i) The man can see an image of the picture in the mirror. Make an accurate drawing on Fig. 8.3 to show a ray of light which enables the man to see this image. [2] (ii) On Fig. 8.3, clearly label the angle of incidence (i) and the angle of reflection (r) of the ray at the mirror. [1] (iii) Mirrors produce virtual images. Explain the meaning of the term virtual image. [1]

20 © UCLES 2009 0653/03/M/J/09 For Examiner's Use 9 (a) Fig. 9.1 shows the main steps in a method used by a student to make a salt. The student reacted the oxide of a metal in dilute sulfuric acid. dilute sulfuric acid powdered metal oxide gentle heat gentle heat Fig. 9.1 (i) Suggest why the student heated the reaction mixture. [1] (ii) Suggest one way the student could make sure that all of the dilute sulfuric acid was neutralised. [2] (b) Complete the symbolic equation for the reaction of calcium oxide with hydrochloric acid. CaO → CaCl2 [2]

21 © UCLES 2009 0653/03/M/J/09 [Turn over For Examiner's Use (c) Fig. 9.2 shows the electrolysis of copper sulfate solution. + – electrode made of graphite (carbon) copper sulfate solution direct current supply Fig. 9.2 (i) The electrolyte in this reaction contains copper ions, Cu2+. Describe and explain how copper ions from the electrolyte are converted into copper atoms on the surface of the cathode. [2] (ii) A student reads in a Chemistry textbook that oxygen is produced at an anode made of carbon when copper sulfate solution is electrolysed. When she tests the gas in her experiment with a glowing splint, it does not re-light. However the gas does turn limewater milky. Suggest what might have happened to cause these observations. [2] (iii) Complete the diagram of an oxygen molecule to show the outer electrons of each atom. [1]

24 Permission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Every reasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included, the publisher will be pleased to make amends at the earliest possible opportunity. University of Cambridge International Examinations is part of the Cambridge Assessment Group. Cambridge Assessment is the brand name of University of Cambridge Local Examinations Syndicate (UCLES), which is itself a department of the University of Cambridge. © UCLES 2009 0653/03/M/J/09 Group 140 Ce Cerium 58 141 Pr Praseodymium 59 144 Nd Neodymium 60 Pm Promethium 61 150 Sm Samarium 62 152 Eu Europium 63 157 Gd Gadolinium 64 159 Tb Terbium 65 162 Dy Dysprosium 66 165 Ho Holmium 67 167 Er Erbium 68 169 Tm Thulium 69 173 Yb Ytterbium 70 175 Lu Lutetium 71 232 Th Thorium 90 Pa Protactinium 91 238 U Uranium 92 Np Neptunium 93 Pu Plutonium 94 Am Americium 95 Cm Curium 96 Bk Berkelium 97 Cf Californium 98 Es Einsteinium 99 Fm Fermium 100 Md Mendelevium 101 No Nobelium 102 Lr Lawrencium 103 1 H Hydrogen 1 7 Li Lithium 3 23 Na Sodium 11 24 Mg Magnesium 12 40 Ca Calcium 20 45 Sc Scandium 21 48 Ti Titanium 22 51 V Vanadium 23 52 Cr Chromium 24 55 Mn Manganese 25 56 Fe Iron 26 59 Co Cobalt 27 59 Ni Nickel 28 64 Cu Copper 29 65 Zn Zinc 30 70 Ga Gallium 31 27 Al Aluminium 13 11 B Boron 5 12 C Carbon 6 14 N Nitrogen 7 16 O Oxygen 8 19 F Fluorine 9 28 Si Silicon 14 31 P Phosphorus 15 32 S Sulfur 16 35.5 Cl Chlorine 17 40 Ar Argon 18 20 Ne Neon 10 4 He Helium 2 73 Ge Germanium 32 75 As Arsenic 33 79 Se Selenium 34 80 Br Bromine 35 84 Kr Krypton 36 39 K Potassium 19 88 Sr Strontium 38 89 Y Yttrium 39 91 Zr Zirconium 40 93 Nb Niobium 41 96 Mo Molybdenum 42 Tc Technetium 43 101 Ru Ruthenium 44 103 Rh Rhodium 45 106 Pd Palladium 46 108 Ag Silver 47 112 Cd Cadmium 48 115 In Indium 49 119 Sn Tin 50 122 Sb Antimony 51 128 Te Tellurium 52 127 I Iodine 53 131 Xe Xenon 54 137 Ba Barium 56 139 La Lanthanum 57 * 178 Hf Hafnium 72 181 Ta Tantalum 73 184 W Tungsten 74 186 Re Rhenium 75 190 Os Osmium 76 192 Ir Iridium 77 195 Pt Platinum 78 197 Au Gold 79 201 Hg Mercury 80 204 Tl Thallium 81 207 Pb Lead 82 209 Bi Bismuth 83 Po Polonium 84 At Astatine 85 Rn Radon 86 Fr Francium 87 227 Ac Actinium 89 9 Be Beryllium 4 I II III IV V VI VII 0 85 Rb Rubidium 37 133 Cs Caesium 55 226 Ra Radium 88 The volume of one mole of any gas is 24 dm3 at room temperature and pressure (r.t.p.). a X b a = relative atomic mass X = atomic symbol b = proton (atomic) number Key *58-71 Lanthanoid series 90-103 Actinoid series DATA SHEET The Periodic Table of the Elements

UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certificate of Secondary Education MARK SCHEME for the May/June 2009 question paper for the guidance of teachers 0653 COMBINED SCIENCE 0653/03 Paper 3 (Extended Theory), maximum raw mark 80 This mark scheme is published as an aid to teachers and candidates, to indicate the requirements of the examination. It shows the basis on which Examiners were instructed to award marks. It does not indicate the details of the discussions that took place at an Examiners’ meeting before marking began, which would have considered the acceptability of alternative answers. Mark schemes must be read in conjunction with the question papers and the report on the examination. • CIE will not enter into discussions or correspondence in connection with these mark schemes. CIE is publishing the mark schemes for the May/June 2009 question papers for most IGCSE, GCE Advanced Level and Advanced Subsidiary Level syllabuses and some Ordinary Level syllabuses. www.XtremePapers.com

Page 2 Mark Scheme: Teachers’ version Syllabus Paper IGCSE – May/June 2009 0653 03 © UCLES 2009 1 (a) A to liver ; B to small intestine ; C to stomach/small intestine ; [3] (b) breaks down/digests, fats/lipids ; to fatty acids and glycerol ; so that they can be absorbed ; [max 2] (c) (i) high, (blood) sugar/glucose ; [1] (ii) makes it absorb glucose/change glucose to glycogen/store glucose/store glycogen ; [1] (d) (i) plasma ; [1] (ii) vein has valves ; to prevent backflow of blood ; artery has, thicker/more muscular/more elastic, wall ; ref. to high pressure of blood ; vein has larger lumen ; allows easier flow ; [max 2] [Total: 10] 2 (a) (i) (speed =) distance/time ; = 900/150 = 6 km/h ; [2] (ii) 1.39 or 1.4 ; [1] (b) (force =) mass x acceleration ; = 8 000 x 0.1 = 800 N ; [2] (c) density = mass/volume or (mass =) density x volume ; mass = 800 x 9 = 7200 kg ; [2] [Total: 7]

Page 3 Mark Scheme: Teachers’ version Syllabus Paper IGCSE – May/June 2009 0653 03 © UCLES 2009 3 (a) chlorine ; copper ; neon ; [3] (b) (i) sodium atom: 11 electrons arranged 2.8.1 ; oxygen atom: 8 electrons arranged 2.6 ; [2] (ii) 1 more proton than electron/11p and 10e ; (other wordings possible but reject because it has lost an electron) [1] (c) (i) hydrogen + oxygen → water ; [reject formulae] [1] (ii) reference to exothermic reaction/it melts ; gas produced (allow hydrogen)/fizzes/bubbles ; metal, dissolves/disappears ; floats ; [max 2] [Total: 9] 4 (a) (i) anther/stamen ; [1] (ii) male gametes/male nuclei/male sex cells ; [ignore sperm] [1] (b) (i) the higher the temperature, the more oxygen is used ; [1] (ii) respiration ; (respiration is) aerobic/using oxygen ; (using oxygen) to produce heat ; [not to produce ‘energy’] by breaking down glucose ; [max 2 ] (c) (i) infrared ; light ; [2] (ii) travel at same speed/transverse waves/can travel through vacuum ; [1] (d) cell approx. rectangular in shape, with cell wall around the outside and vacuole inside ; cell membrane labelled immediately inside the cell wall ; nucleus shown and labelled in cytoplasm ; chloroplasts shown and labelled in cytoplasm ; [4] [Total: 12]

Page 4 Mark Scheme: Teachers’ version Syllabus Paper IGCSE – May/June 2009 0653 03 © UCLES 2009 5 (a) (i) P Q R S 141 282 44 182 ;; (4 correct 1 mark) [1] (ii) 4 carbons ; suitable working ; [2] (b) (i) heated ; vaporised ; [‘boiled’ gets mp 1 and 2] contacted with/passed over a catalyst ; [2] (ii) M and O ; these are alkenes/contain double bonds/are unsaturated ; (bromine changes) from orange to colourless (not clear) ; [3] [Total: 8] 6 (a) (i) (weight of empty lift = 120 00 N) (combined weight =)12 800 N ; [1] (ii) (W =) F x D or mgh ; = 12 800 x 9 =115 200 J ; [allow e.c.f from (i)] [2] (iii) (Power =) work/time ; = 115 200/20 = 5760 W ; [allow e.c.f from (i)] [2] (b) 1/R = 1/R1 + 1/R2 + 1/R3 ; = 1/2000 + 1/1000 + 1/1000 = 5/2000 ; R = 400 Ω; [3] [Total: 8]

Page 5 Mark Scheme: Teachers’ version Syllabus Paper IGCSE – May/June 2009 0653 03 © UCLES 2009 7 (a) all organisms included, with lines drawn ; arrows all correct ; [2] (b) (i) trees/leaves ; [1] (ii) fungus ; [1] (c) energy lost, along a food chain/between trophic levels ; as heat/through respiration ; so less energy available to support animals at end of chain ; [max 2] [Total: 6] small birds leaves fungus ants hawks pangolins

Page 6 Mark Scheme: Teachers’ version Syllabus Paper IGCSE – May/June 2009 0653 03 © UCLES 2009 8 (a) (i) conduction ; [1] (ii) convection ; [1] (iii) wall heater ; [1] (b) solid – particles touching, regular arrangement ; liquid – most particles touching, irregular arrangement ; gas – few particles, not touching, large spaces ; [3] (c) (i) ray(s) drawn from picture to mirror to man – straight lines – angles approx. correct ; arrow(s) on line(s) towards eye ; [2] (ii) both angles required for mark ; [allow e.c.f from (i) – must be consistent with arrows] [1] (iii) cannot be projected on screen/idea that brain interprets an image that is not there ; [1] [Total: 10] 9 (a) (i) to speed up the reaction/so it would dissolve more quickly/because oxide less reactive than carbonate ; [1] (ii) add excess solid ; shown by mixture remaining cloudy ; add solid and keep testing with indicator (paper) ; until mixture neutral/not acidic/specific colour with named indicator ; add solid and monitor pH with a pH meter ; until reading is 7/very near 7 ; [2] (b) (CaO) + 2HCl → (CaCl2 ) + H2O ;; (formulae and balanced) [2] (c) (i) positive (copper) ions are attracted to negative cathode ; ions gain electrons (from cathode) ; ions gain 2 electrons/have their charge cancelled/are discharged ; [max 2] (ii) oxygen has been formed ; oxygen has reacted with the anode/with carbon ; (to produce) carbon dioxide ; [max 2] (iii) 2 pairs of shared electrons and two lone pairs on each atom ; [1] [Total: 10]