BOTSWANA EXAMINATIONS COUNCIL Botswana General Certificate of Secondary Education AA ut < ‘SCIENCE : DOUBLE AWARD 0569/01 Paper 1 Multiple Choice October/November 2022 ‘1 hour 30 minutes Additional Materials: Multiple Choice Answer Sheet Soft Clean Eraser Soft Pencil (type B or HB) READ THESE INSTRUCTIONS FIRST Do not open this booklet until you are told to do so. Read the instructions on the separate Answer Sheet very carefully. 8 Write your name, Centre number and candidete number in the spaces provided on the Answer Sheet unless this has already been done for you Sign your name in the space provided on the Answer Sheet There are sixty questions in 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 using a soft pencil on the separate Answer Sheet Each correct answer will score one mark. A mark will not be deducted for a wrong answer. Any rough working should be done in this booklet, Do not use stapies, paper clips, highlighters, glue or correction fluid ‘You may use a calculator. ‘A.copy of the Periodic Table is printed on page 24. 8080 PS ‘This document consists of 22 printed pages and 2 blank pages, @ BEC 2022 aula8 47. The diagram shows a ray of light refracted by a glass block. 208 What is the refractive index of the glass block? A B c D 1.47 1.54 178 1.92 48 A transformer has an input voltage of 24V. The number of turns in the primary coil is 100 and in the secondary coil is 1000. g vom> What is the output voltage? 24V 24V 240V 2400 © BEC 2022 ose9/01/oin22g 2 49. The diagram shows an electrical circuit. 4 oe 4 1002 202. 200 What is the total current in the circuit? A 012A B 020A Cc 030A D 050A 20 Which diagram shows the path of radioactive emissions when passed through an electric field? A +e + 8 c ++ +, alpha ++ + gamma = beta Seer 21 Some statements about states of matter are listed 1 liquid turns into gas when heated 2 x 3 particles in a liquid state can move past each other Is are highly compressible Which of the statements are correct? A tand2 B tand3 © 2and3 D 1,2and3 © BEC 2022 0569/01/00N/22 [Turn over208 030 22 23 24 25 10 Which sub-atomic particles are found in the nucleus of an atom? A. electrons protons protons and electrons vo neutrons and protons Which pair of substances will react together? sodium bromide and chlorine sodium bromide and iodine sodium chloride and bromine sodium chloride and iodine com> ‘Which row consists of gaseous molecules arranged in a decreasing order of rate of diffusion? (Ac C, 12; N, 14; 0, 16) highest ——————-——> lowest la Co; NO» On [s NOz O C02 c| oo CO, NOz iP Noe CO: 2 ‘The formulae of ions of atoms of the elements in period 2 are shown. Be? & Lit Ne Which statement about these ions is correct? A They have full outer electron shells. They have same number of electrons in their valence shells. B They have same number of electron shells. D_ They have same number of protons in their nuclei © BEC 2022 oseerot/omrez"1 26 Which reaction is endothermic? A combustion B_ neutralisation © photosynthesis D__ respiration 27, Which action will increase the rate of the reaction between calcium carbonate lumps and aqueous hydrochloric acid? A. adding water to the acid B cooling the reactants crushing calcium carbonate D decreasing the volume of the reaction flask 09 28. The ionic equation for the reaction of magnesium and copper(II) sulphate solution is shown, Mg(s) + Cu**(aq) > Mg*(aq) + Cu(s) Which particles are reduced? A cur B cu c Mg* D Mg 29. What is the formula of a chloride of manganse in which manganese has the same charge as in MinO2? A MnCk B MnCl. © MnCl D Mn.cr 030 te pec 2022 eseoovonze [Turn over809 12 30. The diagram shows a set-up used in the electrolysis of aqueous copper(II) sulphate solution +) — anode cathode brown solid deposit copper(II) sulphate Which ion is discharged at the cathode? cog cu w OH so,” 34 Which statement about chlorine is correct? A B c D It bleaches damp litmus paper. Itforms a white precipitate in lime water. Itrrelights a glowing splint. It turns damp red litmus paper blue. 32. Which equation represents a precipitation reaction? A B c D Ba(NOs):(aq) + NazSO«(aq) > BaSO.(s) + 2NaNO; (aq) CuCOs(s) + 2HCl(aq) > CuClo(aq) + H0(1) NaOH(aq) + HCi(aq) + NaCI(aq) + H20(1) Zn(s) + CuSO.(aq) -» ZnSO.(aq) + Cu(s) © BEC 2022 osesroton/2213 33. What is the emperical formula of the organic compound shown. vom> tye Ho re Ca cH.O CH.02 CHO CoHsO2 34 What is the concentration in mol/dm? of a 250.cm* solution containing 0.5g of sodium hydroxide? (Mz NaOH, 40) g A 0.00005 B 0,003, © 0.002 D 0.05 35 Which statement explains the unreactivity of aluminium metal? A [thas a coating of aluminium oxide. B_Ithas a giant molecular structure © Ithas a shiny surface. D tis low in the reactivity series. 36 What are the types of oxide formed by aluminium, sodium and sulphur? ig ‘sodium aluminium sulphur A acidic amphoteric basic B amphoteric basic acidic |e) basic acidic amphoteric D basic amphoteric acidic i @ BEC 2022 0569701/01N/22 {Turn over509 030 14 37. Which group of organic compounds can undergo addition reactions? A B c D alkanes: alkanoic acid alkanols alkenes 38 Which polymer has ester linkage in its structure? A B c D carbohydrate nylon protein terylene 39. The equation shows a reaction in which a simple sugar is produced. (CeH:cOs)n + yH2O — 2CeH i206 Which type of process is shown by the equation? com> condensation hydration hydrolysis, polymerisation 40 The table shows the results of tests carried out before and after boiling on water samples X and Y. number of soap drops needed to form lather s sample X sample Y before boiling 10 1 after boiling — 1 1 ¥ Which salts are most likely to be present in samples X and Y? | sample X sample Y A calcium carbonate magnesium sulphate B calcium hydrogencarbonate ‘sodium chloride Ie magnesium sulphate calcium carbonate | D Sodium chloride | calcium hydrogencarbonate © BEC 2022 ‘os6a/o1/0nN/2208 A030 15 41 In which part of a cell does aerobic respiration occur? 42. The diagram shows three potato strips, each one measuring 35mm. A potato strip was placed in solutions X, Y and Z of different concentrations as shown. The strips were left to stand in the solutions for 30 minutes. x Y z > After 30 minutes each potato strip was measured and the results were recorded as follows: potato strip length /mm x 38 Y 32 Zz I 36 In which of the potato strips are the cells plasmolysed? A Xonly Yonly Zonly XandZ oon BEC 2022 oseeiotvonve2 [Turn over16 43 A student carried out some tests on a food sample. The results are recorded as follows: solution result iodine solution turns blue-black Benedict's solution turns orange Which nutrients are present in the food sample? fais and protein fats and starch reducing sugar and protein com> starch and reducing sugar 44 Which layer of the leaf contains the most chloroplasts? 08 A lower epidermis B _palisade mesophyll © spongy mesophyll D upper epidermis 45. The diagram shows part of the human digestive system. Which part of the system produces both enzymes and acid? g < 46 Which macromolecule are enzymes made from? fat glucose protein voma> starch @BEC 2022 osea/01/00n22208 g < 7 47 Which substance is the final product of protein digestion? A amino acids B_ fatty acids © glucose D maltose 48 Which process results in water loss from a leaf? A. active transport B diffusion osmosis D_ translocation 49. The diagram shows some of the changes taking place during a 28 day menstrual cycle, that started on day 0. hormone ¥_ hormone X follicle. uterus: lining ° ‘Which hormones are represented by the letters X and Y? x Y [a | folcte stimulating hormone oestrogen B | follicle stimulating hormone | progesterone c |. oestrogen progesterone D progesterone oestrogen @ Bec 2022 os6a/01/01N22 [Turn over18 50 Which substance is produced in animal tissue during anaerobic respiration? A. carbon dioxide B_ glucose © lactic acid D_ oxygen 51. The diagram shows the pressure changes of blood as it passes through the blood vessels. Which letter represents the veins? 420 cot ‘ 8 ieee ‘ blood pressure ' ' (in mm/Hg) : ' \ i 40 1 ' 1 ‘ 1 1 ' See 0 See eSEeree ete blood vessels 52 Which blood vessel carries blood from the rest of the body? B A A > ; eR 8 2 i © BEC 2022 0s69/01/01N22209 g 19 53. The diagram shows the human skin. Which part produces sweat? 54 Which pathway represents a reflex action? A. stimulus > effector > sensory neurone ~» relay neurone -» motor neurone -> receptor — response B stimulus > motor neurone —> relay neurone ~» sensory neurone —> effector -> response C stimulus -> receptor —» sensory neurone -> relay neurone -» motor neurone -> effector —> response D__ stimulus -> sensory neurone -> relay neurone -> motor neurone — effector —» response 55 The diagram shows a food web from a woodland ecosystem, thrush 87 Which microorganism is used in the production of penicillin? bacteria fungus protozoa gomp virus 58. The diagrams show fruits P, Q and R. fruit P fruit R & G oe How are the seeds of each fruit dispersed? fruit P fruit Q fruit R A animal wind self B wind self animal c self animal wind D self wind | animal © BEC 2022 osearo1/omN2224 59 Which diagram represents an artery? A B 60 The graph shows how oxygen concentration and the number of bacteria change when sewage is added to a river. ‘At which point down the river will more animals die? sewage g added B D amount/ { arbitrary units A oxygen Y c peste Eee eee pees eee eae r= bacteria +—_+—_+—_+—_+—_+ tea ee Hare eae ety distance down the river/km g © BEC 2022 569101102222 BLANK PAGE 808 @ BEC 2022 osssrovom223 BLANK PAGE 809 g Parmesan Te roproluco Turse whSTs Tire pany oimed Talal OGCEG by SOpVTGNTW HGuGed has been Souq afd cowed where posse Evan, favorable efor ras bsen mace by no pear (EC) to ae Eopyrigt hake, bul fey ams requting Cearence have uniting been led, re raiser wl be pleased 0 mace amend ate earls! posse cpportuy. © BEC 2022 ose91/0N22‘{(013) eunsseud pue ainjesedua} woos ye ,up 92 s1 S26 Aue Jo @jow BuO Jo BUUN}OA aL or aaa | cee | fee ee won] saan (omore) deg 7 | oon | pw) wy uw vesuiswoe ax | Xx | Key, { Bt _| sevuowonmese | cevwm | oma | unmes*| amas? | an? | ane nal ‘s@ues ploujoy £01-06) mj qa | un | ua | on | ka et ‘seues prouerquen 11-25, i ny ur by su 2 ° 19 Tv = ae «| fetes ee tee } i a Hi 1 anos ‘siUOWra OUR Jo E1G21 SIPOLed ayL 4JaSHS viva 08 orev oses/otionee BEC 2022ie eS BOTSWANA EXAMINATIONS COUNCIL + Botswana General Certificate of Secondary Education ‘SCIENCE : DOUBLE AWARD 0569/01 Paper Multiple Choice October/November 2021 1 hour 30 minutes. Additional Materials: Multiple Choice Answer Sheet Soft Clean Eraser Soft Pencil (type B or HB) READ THESE INSTRUCTIONS FIRST Do not open this booklet until you are told to do so. Read the instructions on the separate Answer Sheet very carefully. Write your name, Centre number and candidate number in the spaces provided on the Answer Sheet uniess this has already been done for you. ‘Sign your name in the space provided on the Answer Sheet. ‘There are sixty questions in 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 using a soft pencil on the separate Answer Sheet. Each correct answer will score one mark. A mark will not be deducted for a wrong answer. ‘Any rough working should be done in this booklet. Do not use staples, paper clips, highlighters, glue or correction fluid. ‘You may use a calculator. ‘A copy of the Periodic Table is printed on page 24. “This document consists of 24 printed pages and 3 blank pages. BEC 2021 [Turn over2 4 Which physical quantity is correctly matched with its SI unit? physical quantity ‘SI unit A current ampere B length Kilometre re mass grams D time minutes 2 An object is dropped from a height of 25.0m above the ground. What is the time taken by the object to reach the ground? (g = 10m/s) A 1.286 4 B 224s ey © 250s ane D 500s wy 3 Which quantity is defined as distance moved in a slated direction per unit time? acceleration displacement speed velocity v:oDD> 4 The diagram shows a stop watch displaying the time taken by a dog to run a distance of 1500. What is the time taken by the dog to run a distance of 1500m? A 1057s : B 1570s Cc 65.708 D 105.708 @8e0 2021 sear 1f0INs213 5 Abrick of mass 2.0kg drops from a height h above the ground. ‘The kinetic energy of the brick as it hits the ground is 200J. What is the value of height h? (g = 10m/s*) ~o A tom con oh B 20m ay t c 40m ~ ON D 100m 6 The diagram shows a bimetallic strip used as @ switch in a fire alarm circuit. When the strip is heated it bends downwards to close the circuit. {t+ alarm bell 5 brass {__i iron Which statement explains why the strip bends downwards? brass absorbs more heat than iron brass expands more than iron iron absorbs more heat than brass voomD iron expands more than brass 7 The diagram shows a laboratory thermometer. > 10 0 100110 What is temperature range on the scale of the thermometer? 90°C 100°C 410°C 120°C vomD> eBec 2021 oss9/01/0N21 [Turn over4 8 The diagram shows a thermos flask containing hot water. plastic stopper silvered surfaces —<—} eaten |—alass wall ‘Which features of the thermos flask reduces heat loss from the hot water by convection? glass walls and silvered surfaces glass walls and vacuum plastic stopper and silvered surfaces com> plastic stopper and vacuum 9 Which path shows a light ray through a parallel-sided glass block? A B Va Z |_ glass | glass block block glass | glass | block block BEC 2021 Ds690110NF245 40 Which pair of diagrams shows the correct path of a parallel set of incident rays after passing through a converging and a diverging lens? } 1 A ] J V % tand 3 : 2and4 tand4 2and3 vom> 41 The diagram shows a transverse wave. The frequency of the wave is 2.0 Hz. What is the speed of the waves? A 0.40mis B 25ms Cc 5.0m/s D 10ms 42. Aboy stands some distance from a cliff and produces a sharp sound. The boy hears an echo after 0.50s. The speed of sound in air is 340.m/s How far from the cliff is the boy? Speed of sound in air is 340 mis A 85m | B 170m or Cc 340m D 680m i) BEC 2021 569/01/01N21 [Turn over6 13. The diagram shows an electromagnet surrounded by four plotting compasses. Which plotting compass shows the correct direction of magnetic field lines around the electromagnet? © Otto © 14 Which electrical quantity is measured in watts? charge power resistance soap voltage 15 What is the correct colour for the wire connected to the fuse and the earth pin in a 3:pin plug? fuse earth pin A blue yellow-green B | _ brown yellow-green C | yellow-green brown D | brown bue | e BEC 2021 os69010rN2116 The diagram shows an electric circuit. 1r--4 OE What charge passes through the 6 resistor in 8? 5c 10C 15C 30C \ voOD> 17 A 1000W electric heater is switched on for 0.5hours. Xy The cost of 1kWh costs P0.70. : What would be the cost of using the heater? P0.35 NG Q. 4 PO.70 Mi SS P350 5 P500 vom» Bec 2021 0569/01/01N/21 [Turn over8 18 The diagram shows three resistors and two ammeters, P and Q, connected to a 12V battery. [sa] 20 ;-+ tU saa) G& Which row shows the correct current readings in ammeters P and Q? P reading inA | Qreading in A A 3.0 1.0 B 3.0 20 c 6.0 2.0 D 6.0 4.0 19. Which of the following cannot be used to detect radioactive emissions? A. cloud chamber Geiger-muller tube gold leat electroscope coo thermocouple 20 Which row correctly describes a beta particle? electric charge eee of [a negative no B negative yes ¢ positive no D positive yes eBEC 2021 oses%avomN219 21 Which processes occur when some potassium permanganate crystals are added to water ina beaker? A B c D dissolving and diffusion dissolving and osmosis melting and diffusion melting and osmosis 22 Which molecule has all valence electrons for each atom shared? A B c D CH, HCI 12,0 Ch, 23 The melting and boiling points of substances P, Q, R and S are shown in the table. substance melting point in °C | boiling point in P 114 78 Q “138 0 R “95 69. s 40 4 Which two substances will exist in liquid state at room temperature and pressure? vonD> ooo PandS PandR QandR Qand Ss Which substance releases hydroxide ions when dissolved in water? ammonia carbon dioxide chlorine nitrogen dioxide © BEC 2021 ossa10v/0N21 [Tum over10 25 Which elements are oxidised to solid oxides in production of stee!? ‘A carbon and silicon B carbon and sulphur © phosphorous and silicon D phosphorous and sulphur 26 Which pH value is most likely to be that of a solution formed when sodium chloride dissolves in water? A 2 D4 27 The list shows electronic configurations of some elements L, M, Q and R. een 2, 2, 2, 2 pozr 2 6 Which two elements will most likely undergo oxidation? A LandM B LandQ © MandR D QandR 28 A 25.0cm* portion of 0.0100 mol/dm* hydrochloric acid is diluted to a volume of 250 cm® What is the concentration of the diluted acid? A 0,00100mol/dm* G oxy B 0.0100mol/dm® » © 0.100 mol/dm? : D_ 0.250mot/am* BEC 2021 osss/110Nr24"1 29. Inan experiment, lumps of calcium carbonate were reacted with dilute hydrochloric acid. The set-up shows the balance reading at the start of the experiment. cotton wool dilute hydrochloric acid calcium carbonate lumps 1509 {weighing scale What will happen to the balance reading if powdered calclum carbonate of the same mass is used? A dectease at higher rate B_ decrease at lower rate C increase at higher rate D__ increase at lower rate 30 Which substance dissolves in water to form a coloured solution? A. aluminium sulphate B iron (11) sulphate sodium sulphate D_ zinc sulphate 31 Which substance is used for sterilising water? A ammonia B chlorine hydrogen D nitrogen 32. What is the charge of the manganese ion in MnOz? A 4 B +2 c +4 D 47 Bec 2021 os6o01/0NV21 [Turn over12 33. The diagram shows fractioning column and some fractions obtained from fractional distillation of crude oil Which fraction A, B, C, or D contains an alkane with three carbon atoms? petrol fea neater | fu = 34. An incomplete equation for the reaction of methane with insufficient oxygen is shown. WCH, + 30) > 27 + 4H,0. What is the number represented by w and compound represented by 7? value of w identity of z A 1 co B 1 CO, c 2 co D 2 CO, 35. Which salt causes temporary hardness of water? ‘A magnesium carbonate B__ magnesium chloride © magnesium hydrogencarbonate D__ magnesium hydrogensulphate @ BEC 2021 osea/01/onvat413 36. The structural formula of an organic compound is shown. Which of the following is a property of the compound? A B c D It undergoes addition reactions. It undergoes hydrolysis. It undergoes substitution reactions. It undergoes polymerisation. 37 Which is the correct ionic equation for the reaction of zinc metal and aqueous copper(I!) sulphate? A B c D Zn(s) + Cu**(aq) —> Zn*{aq) + Cu**(aq) Zn?*(s) + Cur*(aq) — Zn**(aq) + Cu(s) Zn**(aq) + Cu**(aq) —» Zn**{aq) + Cu"(s) Zn(s) + Cu*(aq) > Zn*(aq) + Cu(s) 38 Which change of state results in the formation of a structure with closely packed particles that are arranged in a regular pattern? A B c D condensation evaporation freezing melting 39 The set-up shows a key being electroplated with copper. + key aqueous copper(II) nitrate Which element is suitable for making the anode? carbon copper platinum silver © BEC 2021 0569/01/01N21 [Turn over14 40 What is the volume occupied by 4.4g of carbon dioxide, COz, at room temperature and pressure (rtp)? A 0.040dm* 2.4dm* 8.1dm? 240m? coo 41 Which process describes the movement of a seed from a parent plant to a new environment? dispersal fertilisation germination voup pollination 42. The diagram shows part of the human digestive system. Which part secretes the enzyme pepsin? 43, Which process occurs in the oesophagus? A absorption deamination peristalsis Physical digestion cog BEC 2021 osearov/onat15 44. The diagram shows the human urinary system. Which part contains the least amount of urea? 45. The table shows parts of a cell. Which parts can be found in a red blood cell? nucleus | cytoplasm | cell membrane A x v x | B v x v c x Fee) D v v 46 A sample of bread was soaked in water to form a bread extract. Two samples X and Y of the bread extract were tested with iodine solution before and after adding amylase. Sample X was at 35°C and sample Y was at 60°C. This is shown in the table below. colour of fodine solution in bread extract ‘Yemperature before adding afier adding ee CO) amylase amylase x 35 blue-black brown Y 80 blue-black What colour will be observed for bread extract Y after adding amylase? A blue-black B brown © brick red D purple eee 2021 oseonvoinat [Turn over16 47 The diagram shows the structure of a flower, In which part does fertilisation take place? 48 The diagram shows the male reproductive system. Which structure is the sperm duct? What is the name of the part labelled Z? A. cell body B dendron axon D dendrite BEC 2021 osserov/onvat7 50 Which statement is correct about how a contraceptive pill prevents pregnancy? A. They immobilise sperm They kill sperm They prevent ovulation They stop sperm from entering the vagina ooo 51. The diagram shows the endocrine system. w- 7 8 8 A What are the parts labelled W and X? w x A thyroid adrenal —_| lB pancreas pituitary c pituitary adrenal j > thyroid pancreas 52. The diagram shows a cross section of a leaf. Which tissue is responsible for transporting of dissolved organic materials in a plant? © BEC 2021 56a 10N21 [Turn over18 53. The diagram shows two potato strips, one placed in distilled water and the other placed in a concentrated salt solution, s concentrated salt lod water. Ce aelias potato strips —" solution What changes will be observed on the length and texture of the potato strips after 30 minutes? potato stip ndititod water | PStLO Stein conconioted A short and softer nochange iniength | B longer and harder shorter and softer c shorter and softer longer and harder D no change in length longer and harder 54 The graph shows effect of temperature on enzyme activity. At what point are enzymes most likely to be denatured? enzyme activity A B c D ‘Temperature / °C 55 The table shows percentage composition of different food samples. Which food sample can be recommended for a 2-year old baby? percentage composition food samples carbohydrates | proteins fats A 10 39 51 B 20 44 37 c 50 44 6 D 62 23 20 @BEC 2021 osssyotsonu2119 56 Which organism is used in bread making? bacteria fungus virus vom>D protozoa 57. The diagram shows the human circulatory system. P Q — = || df the eee heart lungs = aon s R Which blood vessels carry deoxygenated blood? A PandQ B PandR © Qands D RandS 58. The following were observed after a rainy season. 1. tree leaves develop holes 2. building roofs corroded 3. loss of green pigment by plants What could have caused these effects? A__ improper disposal of sewage B_ fumes froma factory C excessive use of fertilizer D spraying pesticides BEC 2025 s69/01/01N21 [Turn over20 59 Which weather condition and activity will result in a person having the lowest concentration of water in urine? weather condition activity A warm running B warm seated c cold running dp | cold seated 60 The diagram shows a food web. large fish small fish water beetle diving beetle insect larvae water snail tadpole microscopic plants water plant Which of the following shows a complete food chain in this food web? insect larvae + water beetle — diving beetle — large fish water snail > tadpole —> small fish > large fish water plant -> diving beetle -> small fish — large'fish v:om> microscopic plant -> water snail -> small fish —> large fish eBEC 2021 ossamv/omN2t2 BLANK PAGE, BEC 2021 os6010 10212 BLANK PAGE @ BEC 2021 ossoiovona423 BLANK PAGE Pennisson le reproduce Tams whore Hird pay owned maar protested by copyright» Feluded fas beon sought and cleared whore posse, Evary reasons efor hes boon tase by the publene [BEC tea copyaght hacer, bt any Hors fequing larrce have unt Boon Held, te Dobler wl be pleaced to mate amands atthe earos ossbie opportu @BEC 2021 0869101102124 ‘ainssaid pue eunyeraduiay Wood 2e glup v2 5] S26 AU Jo eIOUN BUO jo swiNjon oY, La3HS Viva wot er ee ee ee ee ee 7 1 vn ya | wg) uy | ong | dN a ed uW rquisowor=x | x | fay | se | seusuocemmase | * ry =| ..*| "| "| =} #| 8) © : oon semua | nea” | amor” | een” | sumer’ | aman | wenn | rae | ano seuies plounoy c01-06h ™ Ag) at | pp | na} wg | wa | PN ad oo) 7 su a a a a ei m o om Soues PIOURYIUET 12-89, a) «| @ oy | ew | ag @ | *) *) "| 28) Le oy] a] ee) Le) LO) ups) a] _@ vr] amr | urease] ne | ss | amen? | soon |e | wm | awe “| cso] ca S| ot cm | wamoen | went = | arn va] ow od ‘a ad Ww SH | ony ad 4 so | oy mM Ho) eT ea | so | wm | we | we | wo | m | ow | m | on | om | om wm | oe | os | om a sf elo) |_| __#| _»|__»|__ «|» oT) ®) | se me | srt | tw | on) arp” | ences” | ames “| amoane” | une” | wnat” | ams” | amacan | a”) ama” | aan | am | pee x |r | a | as | us | uy | po | fy | pd uy | me | op | ow | an | wz | A us | aw eof fw | oe | oo | ow | om | om | oe | om | iw « | «= | « | « | « | # =| =) | 8) ef eye] _e| a2] _e|__2|_ | a2] _# i sean | am” | sme | soy | amend | ceo] ae | mt | am | |e | esta | cruel” | wom” | eum | emus” | wana” | an m | ag | es | sy | ep | eo | uz | mo | w | oo | ey | ow | to | vA | | oes | eo | s | ew |e {we |e | ow | o@ | ow | w | @ | ws | we | ow | i | i | ow | ow | *) oT oa) oe oy e Ey 7 [ey | sans] mate | muss | ce” | ene seman | cs ;w}wm}s | a) is | w Sw |) oN o | so | = « |e | 2 ew | 2 om @ a Z 7 7 > . vom | aaons 8] tte *| tas S| a 8) ae sovtee” | en aN | 4 o/|n}]o/]a ea jon e | a % # a u ® t 7 n ws toy oH H of;minmutata fo W ‘drop SyuaUIETy Sip 40 2121 DIpo}eg OYL os6e/o1/0N/21 eee 2001na BOTSWANA EXAMINATIONS COUNCIL + Botswana General Certificate of Secondary Education SCIENCE : DOUBLE AWARD 0569/01 Paper 1 Multiple Choice ‘October/November 2020 4 hour 30 minutes: Additional Materials: Multiple Choice Answer Sheet Soft Clean Eraser Soft Pencil (type B or HB) READ THESE INSTRUCTIONS FIRST Do not open this booklet until you are told to do so. Read the instructions on the separate Answer Sheet very carefully. Write your name, Centre number and candidate number in the spaces provided on the Answer Sheet unless this has already been done for you. ‘Sign your name in the space provided on the Answer Sheet. 598 ‘There are sidy questions in 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 using @ soft pencil on the separate Answer Sheet, Each correct answer will score one mark. A mark will not be deducted for a wrong answer. ‘Any rough working should be done in this booklet. Do not use staples, paper clips, highlighters, glue or correction flu. You may use a calculator. ‘A copy of the Periodic Table is printed on page 24. 8 “This document consists of 24 printed pages. BEC 2020 [urn over1 The diagram shows a simple pendulum. 3S oO Po ~»O—+ R The pendulum takes 0.608 to swing from Pito R'and back to P. What is the period of the pendulum? g A 0.158 B 030s Cc 060s D 1.208 2 Which pair of values for mass and weight are for an object on Earth? The gravitational field strength on Earth is 1ON/kg. mass/kg | weight/N A 5 10. B 5 05 Ea - c 10 10 < D 10 100 « instrument is most suitable to accurately measure the internal diameter of a test-tube? A. measuring tape B_ metre rule © micrometre screw gauge D_ Vernier caliper BEC 2020 0589101/07NW204 Which statement defines displacement? A. The distance covered ina stated direction. B_ The distance covered per unit time. The distance covered per unit time in a stated direction. D The length between two points. 6 The diagram shows a hot metal block. One side of the block is painted black and the other side is silvered. ‘Two identical thermometers are placed at the same distance from each side of the metal block as shown. hot metal block thermometer 8g silvered painted black painted surface ‘surface ‘After 3 minutes, it is observed that the temperature rise of the thermometer beside the black painted surface is more than the one beside the silvered painted surface. Which statement is the correct conclusion from this experiment? A The black surface is hotter than the silvered surface. The black surface emits more thermal energy than the silvered surface. g B The silvered surface is cooling down faster than the black surface. D_ The silvered surface emits more thermal energy than the black surface. 6 Aripple tank is set to produce 2 complete waves in 2.5 seconds. What is the frequency of the waves? A 04Hz Bek om B O8Hz pe Cc 1.25Hz a D 2.50Hz © BEC 2020 0569701/0N20 [Turn over503 g 4 7 The diagram shows a bimetallic strip made from brass and iron. brass iron When the strip is cooled, brass contracts/more than iron. Which shape will the strip become when cooled? 8 The diagram shows a ray of light entering a parallel sided glass block. The refractive index of glass is 1.5. The diagram is not drawn to scale. What is the value of the angle of incidence? A 233° 1 OM B 525° : \ Cc 55.0° D 59.4° ©BEC 2020 os691/01N20599 A029 9 10 "1 412 13 5 Which statement defines the amplitude of a wave? A. Aline joining two particles that are in phase. ¥ B__ The distance between two successive troughs. C The distance travelled by a wave per unit time. x, D__ The height of a crest measured from the rest position. A student hits a drum that is some distance away from a cf. The student hears an echo 3.0 seconds after hitting the drum. How far is the clif from the student? The speed of sound in air is 320 m/s. A 107m y! B 480m A 960m D 1920m Which symbol is for a fixed resistor? A B c Z. D Which statement defines a volt? ‘A The energy per unit charge. B__ The opposition of flow of charge by a conductor. The space around a unit charge. D_ The rate of flow of charge. A transformer changes 240 to 10V. The transformer has 100 turns in the secondary coil How many turns are there on the primary coil? ai? A 24 B 1000 2400 D 24000 BEC 2020 0s69101/01N20 [Turn over14 15 593 A029 16 A1.2kW electric stove is used for 2 hours. Electrical energy is charged at P0.60 per kWh What is the cost of using the stove for 2 hours? A PO.72 gH B P4120 ‘ Cc P144 D P2.40 The diagram shows an electric circuit 320 20 The reading of the voltmeter is 2.4V. be ‘What is the reading of the ammeter? « A 083A et ' B12A “ye © 20A > D 304 ‘ ‘Which group of electromagnetic waves is arranged in the order of increasing wavelength? infra-red radiation —> ultraviolet radiation > X-rays ultraviolet radiati — infra-red radiation > visible X-rays —> infra-red radiation —> visible light com> X-rays —* visible light — infrared radiation © BEC 2020 (0568/01/01N1/207 47 The diagram shows a piece of iron placed near the N pole of a permanent magnet. N iron’ Which diagram shows the magnetic field pattern produced between the magnet and the iron? NI v iron 599 iron N iron 029 48 Which instrument is used to detect radioactive emissions? A galvanometer Geiger-Muller tube thermometer ooo voltmeter @BEC 2020 0869101/07N20 [Turn over19 The diagram shows a negatively charged rod placed next to two insulated conducting spheres, X and Y. The spheres are touching each other. insulator 596 ‘The spheres are separated with the rod in place, The rod is then placed close to sphere X. Which diagram shows the correct distribution of the charges in the sphere? A B g < @ BEC 2020 0697010181209 20 Which row shows the most penetrating and most ionising radiation? most penetrating most ionising A alpha particle gamma rays B beta particles alpha particle fo} gamma rays alpha particle D gamma rays beta particles _ 24 Which diagrams show particles that could represent neon and chlorine gases? A B oO 0 °o ¥§ @ gioco fellllife) 8&6 o Ce oO & sige ° 6/8 8 ce @||/%%& 8 0] la & 22 Which element is found in group IV and period 3 of the Periodic Table? A. gallium B germanium indium D A029 silicon 23 Which of these gases present in a car exhaust is not removed by a catalytic converter? ‘A catbon dioxide B_ carbon monoxide nitrogen dioxide D_ sulphur dioxide ee @BEC 2020 os69101/0NNr20 [Turn over40 24 Which substance will convert ethanol to ethanal? A hydrogen iron oxygen steam soo 25 The diagram shows the structure of a substance. The letters P and Q are not symbols of elements. 8 Which pair of physical properties is likely to be that of the substance? I ; ‘conduction of electricity Teen Pot when in liquid form Al high i good y B high poor c low good D low poor g 26 Which process is exothermic? 2 A evaporation B metting © photosynthesis, D respiration \. 27 In which equation is the underlined substance an oxidising agent? Nye Ponders 2KI (aq) + Brall) > 2KBr(aq) + I2(aq) CaCIn(aq) + 2NaOH(aa) —> Ca(OH)e(s) + 2NaCl (aq) CuSO.(aq) + Zn(s) —> Cu(s) + ZnSO,(aq) HCI(aq) + NaQH(aq) —* NaCl(aq) + H2O()) com> ‘© BEC 2020 ssa 1/0rN20"1 28 Carbonates X and Y are heated as shown in the set-ups. carbonate X 4 relt Lushai nig *mBOnHLOY ere clear 3 turns milky { _ ‘What is likely to be carbonate X and Y? x Ht Y | calciumcarbonate | zing carbonate B | copper(II) carbonate sodium carbonate | sodium carbonate calcium carbonate D| zinc carbonate copper(II) carbonate 29. Which oxide will turn a universal indicator paper purple when dissolved in water? A carbon dioxide § nitrogen dioxide « B © sodium oxide sulphur dioxide y : . 30 How many elements are present in the compound NazCOs.10H,0? A4 BOS c 27 D 36 be @ BEC 2020 ose901/01N20, [Turn over12 34. Which is the correct set-up for electroplating a metal rod with copper? A B aqueous aqueous +—— copper(I) | copper(t) ‘sulphate ot sulphate s pl metal metal. copper rod rod ites D g =| aqueous aqueous silver nitrate | silver nitrate metal metal = pont | per rod rod 32. The equation for the reaction of aluminium and dilute hydrochloric acid is shown. 2A(s) + BHC (aq) — 2AIC (aq) + 3H:(g) 13.5g of aluminium is reacted with excess dilute hydrochloric acid. What is the volume of hydrogen gas produced? _ A 6dm? : @ Prag 2 B 12dm? fae f Cc 18dm* D 72dm* @ BEC 2020 0569101/0/N12013 33 The equation for the combustion of ethane is shown. b & e eptila) + xOxl@) > yCOxa) + 7H,0(0) What values of w, x, y and 2 balance this equation? w x y z A 2 2 3 B 7 2 6 c 3 4 3 Ip = 7 4 6 34. Set-up X shows a piece of zinc metal reacted with 100 cm’ of 0.1 mol/dm® hydrochloric acid, 599 Set-up Y shows the same mass of zinc metal being reacted with 100 cm? of 0.1 mol /dm® of ethanoic acid. set-up X set-up Y |-—ethanoic }-—— hydrochloric 2 acid acid zinc metal zinc metal Which row A, B, C or D is true about the concentration of hydrogen ions in the acids and the rate of reaction in the two set-ups? g concentration of H" ions rate of reaction A higher in X higher in X B higher in Y same ¢c same higher in Y Ey same same be BEC 2020 O569101/0/N/20 [Turn overg a 14 35. The diagram shows a blast furnace used for the extraction of iron. waste gases \vly, hot air—— Which gas is of the largest proportion in the waste gases? A. carbon dioxide B carbon monoxide C nitrogen Doxygen 36 Metals A, B, C and D are each added to cold water in a test-tube, ‘The experiment is repeated with dilute hydrochloric acid, The table shows the observations made for each metal, ‘Which metal could be aluminium? metai| reaction with cold water reaction with dilute hydrochloric acid no reaction no reaction bubbles produced fast no reaction bubbles produced very slowly at first, then very fast bubbles produced fast A B_ | bubbles produced very slowly S us D bubbles produced very fast 37 Which is not a use of sodium carbonate? A cement making glass making making bleaches softening hard water goo @ BEC 2020 ‘o569/01/0N/2015 38. The structure of an ester compound is shown. faye o=o0 k m-O-r = ro-rz ‘Which structures represent organic compounds that form the ester when reacted? H-C—H i F i xm-O-—zr Ey I-o-r ea | i 1 I o> ney x= = x oat CL z £ E £ g g g z \ i J j i i ; i xrI—O—- zt clk o=P Saye a aaa ie eee eat —r rd te pba = q | [3 ator ats coe tals i | | : l y i a ° 2 208 ezow [Turn over ‘os69/01/0N20 © BEC 2020508 § 16 39 Which catalyst is used during addition of hydrogen fo an alkene? A AbOs B Fe © MnOz D Ni 40 Which fraction of crude oil is used to make furniture polish? bitumen gasoline kerosene lubricating oil! com> 41. The diagram shows a plant cell. ‘Which numbered parts are also found in animal cells? A tand3 B tand4 © 2and3 ¥ D 2and4 y 42 Which component of blood is not involved in blood clotting? A plasma / B platelets © red blood cell « D__ white blood cell © BEC 2020 ssa 1/0/2047 43. The table below shows the composition of some chemicals samples of urine from different persons. ‘Which sample is likely to be from a healthy person? composition in arbitrary units glucose salts amino protein al 000 y| 15 000 | 00 B| ooo x| 00 0.05 60 c ‘0.10 15 0.00 ry 00 dD) 0.10 00 | 008 60 g 44 The diagrams show four set-ups to demonstrate osmosis. In which set-up will the liquid rise from point X to point Y be faster? A B Y Y x —x capillary tube capillary tube visking tubing visking tubing i— with 0.2% — with 0.2% ‘sugar solution ‘sugar solution }— pure water }-— 0.2% sugar solution ~ 7 i 7 t g -—Y t Pye 2 | i Xx x ( {capillary tube capillary tube =| _visking tubing visking tubing with 0.5% }— with 0.5% | sugar solution sugar solution —j— pure water | 0.2% sugar solution BEC 2020 ossa10101Nr20 [Turn over593 =z 45 46 ar 18 The graph shows the results of an experiment performed to determine the effect of temperature on the action of an enzyme that works in the stomach of a human being. rate of reaction| 10 20 30 x)= 80 60 temperature/*C Which product of digestion will be produced in large amounts at temperature X? fatty acids glucose“ maltose polypeptide « vomop Which statement is not true about anaerobic respiration in yeast? A. Itproduces carbon dioxide, B_ Itreleases energy. CG Itrequires glucose. D Ituses up oxygen. ‘Which method of contraception is used to reduce the spread of syphilis? A condoms B diaphragm « © injection ~ D spermicide ,y ‘What happens to excess amino acids in the liver? ‘They are absorbed. They are deaminated They are digested com> They are excreted. © BEC 2020 osse/0tvonu20593 § 19 49 The diagrams show four set-ups of potted plants in bell jars under different conditions. In which set-up would most oxygen be released? leaves ‘covered with foil B Ss sodium hydrogen carbonate solution to add carbon dioxide light Sy @ soda lime to absorb carbon dioxide 50 The diagram shows a kidney machine. dialysis tubing Which row correctly identifies W, X, Y and Z? Ww x PE Zz blood from patient | fresh dialysis fluid | blood to pafent | used dialysis fluid B | fresh dialysis fluid | blood from patient | blood to patient | used dialysis fluid | blood from patient | fresh dialysis uid | used dialysis fuid | blood to patient | D | fresh dialysis fluid | blood from patient | used dialysis fluid | blood to patient © BEC 2020 56910 1/01N/20 [Turn over20 61 The diagram shows a food web. snake, a — co Sin 4 i: - TS der a Pa al | bush pear How many |secondary consumers'are shown in the food web? Ad 8 B 2 c 3 D4 52. The diagram shows a section of a flower. g ‘What is the name of the part labelled X? anther filament < ovary ovule com> 53. Which blood vessel takes blood to the lungs? A aorta B_ pulmonary artery © pulmonary vein D be vena cava «BEC 2020 ossarot/omi20a 84. The graph shows changes in a person's blood glucose concentration over a few hours. At which point is adrenaline produced and released into the blood? 4 A ¢ blood D glucose concentration B of oH HHH HA time/hours: 55 The diagram shows a developing foetus in the uterus. 8 \ blood vessel Y / J ae fy developing foetus Which substance is found in high amounts in blood vessel Y? A amino acids is B glucose 3 oxygen D urea 56 The diagram shows a section through a leaf. Which type of celis release most oxygen during the day? Pe © BEC 2020 oseerot/omre022 87. The diagram shows some of the structures involved in a simple reflex action. In which labelled part are the receptor cells located? 58 Which organ produces the male gametes? A. penis v B prostate gland y © scrotum D testes 59 Sweating is a response by the skin to temperatures above normal ‘The steps that occur to bring the temperature down to normal are listed but not in the correct order. 1. The brain coordinates the response. 2. Temperature receptors are stimulated in the skin.“ ' A029 3. Sweat evaporates from the skin surface. 4, Sweat is released onto the skin surface. 3 Which of the steps is the first to occur? com> Bons © BEC 2020 oss/01/01N2023 60 Four visking tubing bags are each filled with different solutions. ‘The bags are then placed in beakers containing water. The bags are made of partially permeable membrane. beaker 1 beaker 2 starch glucose solution solution water at 35°C beaker 3 beaker 4 8 starch solution saliva + saliva water at 36°C ‘After 20 minutes, a sample of water from each beaker is boiled in Benedict's solution. What are the expected results? beaker | beaker 2 beaker 3 beaker 4 Al blue orange blue orange B| blue orange orange blue a ©} orange blue orange blue g L = D| orange blue blue orange Pexrianon © repredice Kame whore td pary onied malarial prolcieg by Sopyght Induced as been cought and cleared where poatbin Every Feasonabe efor hes bean ‘no pubtaner (BEC) to Wace Gopyght ade, buf any tems reuling dosrance have unwtngly Been cluded, me publor ibe pleased to make amen at the eerest possible oppor © BEC 2020 ‘os6e/otonve0(19) eunssaid pue sinjeredussy woos ye ;tup #2 SI Se6 Aue yo J0UN BuO Jo OUUN}on oy, orarnon | ca” anumng? waar sung? | semteE wo) Ud = v } PW) wy | sg wy uw weaulsquoe-x| x | hoy t | 2 | sewouoesnamice | seo] mi] ama | a um ant — souos pourpy cov-06: eee eect teeeeeeetee co fs ° suas provetjuer 11-95, To) on 1 oye cy ad ad JH Pa | so | a es = a fom ax us aN oz as | oa oD 2D a | a es | eo | y 2 joe asf Pe ee ee Eel toe |e te pasa | da | sncins | we” es v ji |s | a | os Sw | PN er eer ee ee Root a] sa | of nN | o | s en oH 0 m In aN im N | ‘anoi5 siuewiela eu) Jo elqed oIpoteg ouL (4L33HS Viva oss vomN20 @BEC 2020BOTSWANA EXAMINATIONS COUNCIL = Botswana General Certificate of Secondary Education SCIENCE : DOUBLE AWARD 0569/01 Paper 1 Multiple Choice October/November 2019 4 hour 30 minutes ‘Additional Materials: Multiple Choice Answer Sheet Soft Clean Eraser Soft Pencil (type B or HB) READ THESE INSTRUCTIONS FIRST Do not open this booklet until you are told to do so. a Road the instructions on the separate Answer Sheet very carefully. Write your name, Centre number and candidate number in the spaces provided on the Answer Sheet unless this has already been done for you. Sign your name in the space provided on the Answer Sheet ‘There are sixty questions in this paper. Answer all questions, For each question, there are four possible answers A, B, Cand D. Choose the one you consider correct and recard your choice using a soft pencil on the separate Answer Sheet. Each correct answer will score one mark, A mark will not be deducted for a wrong answer. ‘Any rough working should be done in this booklet. Do not use staples, paper clips, highlighters, glue or correction fluid You may use a calculator. A copy of the Periodic Tabie is printed on page 24. nore Be This document consists of 24 printed pages, nec 2019 frum over1 The diagram shows part of a rule. jo 1 2 30m What is the accuracy of the rule? A 0.001om B 0.01em © 010m D 1.0cm 2 Astone thrown vertically upwards reaches the highest point and then falls. 3 ‘Which speed-time graph represents the motion of the stone? A B speed speed 0 0 time 0 time c D 2 speed speed 0. 0 time BEC 2019 os69101V0NNII9 o timeow oe 3 3. Agitl places a pack of 5 bottles on a shelf of height 1.5m. The work done to place the pack on the shelf is 45.0J. What is the mass of each bottle? (g = 10N/kg) A 06kg B 3.0kg © 9.0kg D 30kg The diagram shows a spring with different loads hung from it. The diagrams are not drawn to scale. 40cm What is the value of load X? A 42N 5.0N 9.0N 414.0N vog An aluminium pot is used to boil water. By which process is thermal energy transferred through the walls of the pot? A condustion only B conduction and convection © convection and radiation D radiation only eBEC 2010 Os60/01/01NNI9 [Turn over954 aot2 Ee 4 6 A substance iin its liquid state at 75°C is left in a room to cool. The room temperature is 30°C. The table shows the changes in temperature of the substance when cooling. time/s 0 10 20 30 40 50 60 70 temperature/°C 75 56 45 45 45 36 30 30 ‘What is the freezing point of the substance? A 30°C B 45°C Cc 55°C D 75°C 7 Which diagram shows the movement of air between the land and the sea during the day? A ry land water TN land water BEC 2019 oss9101/0NNI9 land cn, water3 pore ie 5 8 Which combination of units is equivalent to a coulomb? ampere A “second second ampere volt joule joule voit 9 Which diagram shows the relationship between voltage and current for an ohmic conductor? A B Lo | 0: ; Tr Lo. Vv c 0 v eBEC 2019 ‘os6o/01/0nWI9 [Turn over6 10 A fuse of rating 5.0A is fitted in a kettle marked 1800W, 240V. ‘What would happen when the kettle is switched on? A. The cable overheats. B The element heats the water slowly. © The fuse metts. D The kettle works normally. 14. The table shows copper wires of different lengths and diameters. Which copper wire has the highest resistance? length of copper/cm | diameter of copper/mm A 75 05 8 B 75 1.0 c 100 0s D 100 1.0 12 Which diagram shows the electric field pattern produced by a positive charge? A B 2 c D BEC 2019 os69/01/01N/18a 43. A plotting compass is placed near a permanent magnet at point X. x |N s Which diagram shows the correct position of the needle of the compass? © ® ® 414 Which diagram shows the correct symbol for a transformer used to step-down 240? A B ® 354 A B a Eee HE \¢ 240V(~) 3 ¢ © Ze | 34 ¢ ° L 3 c D ; ° ° 2 to Hsin 5 21% 2 a BLS 240 (~) 3 $ i : ° TEES EL Q oxec 2018 os6a/01100N19 [Turn over34 18 The diagram shows an electric circuit 6.02 6.00 600 What is the total resistance of the circuit? A 402 B 60a © 1200 D 1800 16 The diagram shows a longitudinal wave Which letter represents the wavelength of the wave? 1 A : =e 17 A rope is shaken up and down to produce a wave of frequency 8.0Hz and wavelength of 0.3m B ! | How long does it take the wave to travel 6.0m along the rope? A 028 B 04s c 25s D 445 © BEC 2019 os62/01/01N/1948 The diagram shows two radioactive emissions T and U passing through an electric field, > What are the radioactive emissions T and U? T u A alpha gamma B beta gamma 3 c gamma alpha D gamma beta 19 Whats the nature of an alpha particle? electromagnetic wave fast moving electron helium atom vomaD> helium nucleus. 20. The diagrams show two waveforms of sound displayed on similar screens. IA Vi TV P Q How does the pitch and loudness of Q compare with those of P? pitch of Q loudness of Q A higher louder B higher softer c lower louder D lower softer @BEC 209 0559/01/01NI19 {Turn over10 21 Which substance is likely to be found in an anti-acid? calcium carbonate calcium sulphate sodium chloride sodium nitrate com> 22 Which gas is used to manufacture fertilisers? ammonia chlorine neon coup oxygen ast 23 How many electrons are there in iron(II), $ Fe°*, ion? A 23 28 29 30 ooo 24 Which change of state is endothermic? gas -> liquid gas ~> solid liquid + solid von solid — liquid 25 The equation for the reaction between sodium and chlorine is shown, 2Na(s) + Clg) > 2NaCi(s) Which term describes the reaction? decomposition neutralisation precipitation redox vom> © BEC 2019 O569/01101NAE1 26 Substance X has a high melting point and conducts electricity in solid state. Which structure is likely to be that of substance X? A B H—Cl c D @QOQOO H HOH % QGQOGO toot ® OOCOOOG eee Het HoH OH 27 Carbon and fluorine are in period IT of the Periodic Table. ‘Which statement about the two elements is true? ‘A They have equal number of shells. B_ They have the same atomic radius. © They have the same number of electrons in their outermost shells. D They react by sharing two electrons. 28 Which elements are components of alloy solder? A copper and tin A012 B_ copper and zine © lead and tin D lead and zine 29 Which environmental problem is caused by an increase in the concentration of carbon dioxide in the atmosphere? A acid rain B deforestation © depletion of ozone layer D_ global warming be @BEC 2019 0568/01/19 [Turn over54 Antz 12 30. Structures of substances W, X, Y and Z are shown H —C—O-H Which substances react to form an ester propyl-propanoate? A WandX Wand Y B © XandZ D Y and Z 31. Metals P, Q, R and S were each reacted with solutions of their metal nitrates, ‘The results are shown in the table. metal | nitrate of metal P | nitrate of metalQ | nitrate of metal | nitrate of metal S P no reaction Ao reaction no reaction Q_| metal P displaced no reaction no reaction R_| metal P displaced | metal Q displaced metal S displaced S_| metal P displaced | metal Q displaced | _no reaction ‘What is the correct order of decreasing reactivity of the metals? most reactive ———————> east reactive A Pe Q s R B P s Q R c R s Q P D R Q s P nec 209 os68/01/0N10aor be 13 32. The list shows uses of some compounds. (making cement (ii) softening hard water (ii) extraction of iron (iv) making glass Which uses are for sodium carbonate? A (and (il) B (i) and (w) © (ii) and (i) D ii) and(v) 33. The structure of a polymer is shown. q =9-s 20-9 =p z-t-9 a zee Which structure is that of a monomer for the polymer? A B ng if rh eee a HoH HoH c D H Cl oH H LOH a te prereset es cae oa H 1 H H H H H 34 What is the relative molecular mass, M, of ammonium carbonate, (NH,)2COs? TAG N, 14: Hi; 4; C, 12; 0, 16] A 78 B 82 c 92 D 96 © BEC 2010 0569101/01NN19 [Turn over14 35 An oxide of element X dissolves in water producing a solution of pH 2. What could element X be? A aluminium B_ hydrogen Cs sodium D sulphur 36 Which substance is a yellowish green gas? A chlorine B fluorine © nitrogen 3 Doxygen 5 37. Study the flow chart diagram. carbonate of metal T lheat v 1 black solid carbon dioxide gas add dilute acid $ blue solution Eco white precipitate silver nitrate What could metal T and acid S be? S metal T acid S A copper hydrochloric acid B copper sulphuric acid c iron hydrochloric acid D iron sulphuric acid 38 Which substance is a product of the hydrolysis of starch? A amino acids B fatty acids © glucose D @ glycerol @BEC 2019 os69/01/01NI9a 15 39 Which is a test for the purity of sodium chloride? A. determining its melting point B determining its pH determining its solubility in water Determining its water of crystallisation 40 What is the empirical formula of a compound which contains 6.2.g phosphorus and 8.0g oxygen? IA: P, 31; O, 16] A POs B POs Cc P.O D PsO, 41. The diagram shows a normal plant cell which was placed in a sugar solution for 30 minutes. cell sap in the vacuole normal cell cell after 30 minutes in sugar solution Which term refers to the changes that occurred? A. bursting B_ plasmolysis shrinking D_ turgidity © BEC 2019 0589101/01N'18 [urn over6 42. The diagrams show four cells. Which cells are from a plant? A LandN B Lando © MandN D Mando 43. A plant is placed in an open space for 5 days. The diagrams show the plant at the beginning and after 5 days. Aor at the beginning after 5 days ‘Which of the conditions will cause the observed change in the shortest time? temperature humidity wind speed A high high low B high low high Cc low | high high D tow low low Pa @BEC 2019 oseantiomia7 44 Which nutrient is used to increase the muscle growth of animals? A fat B glucose © protein D vitamins 45. The diagrams show cross-sections of three types of blood vessels. The diagrams are not to scale. 3 P Q R What are the blood vessels P, Q and R? P a R A artery | capillary vein B | capilary| artery | vein c | artery vein | capillary D | vein | artery | capillary 46 Which component of blood converts fibrinogen to fibrin? A lymphocytes B phagocytes 8 platelets a D_ red blood calls, 47 The table shows the percentages of components in foods A, B, C and D. Which food will have most of its nutrients undigested in the human body? food | % ofprotein| %offat | % of carbohydrates | % of fibre A 10.6 32.1 95 0 B 67 49 34.6 53 c 03 0 11.9 20 D 13.3 63 0 80 BEC 2019 0569/01/09 [Turn overAor i 48 49 8 The graph shows how the internal body temperature changes during and after an exercise. body temperature/ °c time/s During which time period was vasodilation most likely to be the highest? A EtoF B FtoG © GtoH D Htol ‘The diagram shows @ developing foetus attached to the uterus wall uterus wall structure X ‘What is the function of structure X? A to supply carbon dioxide and urea to the foetus B to supply oxygen and glucose to the foetus © topass oxygenated blood from mother to the foetus D__to pass deoxygenated blood from foetus to mother @8EC 2019 os6a01/0IN/19354 ante et 19 50. The diagram shows changes that occur in the thickness of the uterus lining during the menstrual cycle. At which point is ovulation most likely to occur? thickness of the uterus li ining time 1 A person has a pancreas that produces insufficient insulin. The person eats a meal rich in carbohydrates. Which graph shows changes in the blood sugar concentration of the person? A © BEC 2019 B » » ~& 5 3s <8 By 8 38 normal a normal Be 38 a8 35 3 0 0 0 4 8 0 6 eating time/ hours eating time /hours 5 5 5S a2 88 Eg 25 nomal = § normal Be BEN a8 26 0 0 0 atte 0 6 eating time /hours eating time hours es0901/01Nn9 [Turn over20 52 The diagram shows a food web in a pond. plankton pond weed Ae ‘Which food chain can be obtained from the food web? © BEC 2019 os69101/01NN19 large fish 3 trophic levels. 1 2 3 4 fish eagle | smallfish | plankton _| pond weed plankton | tadpole _| large fish_| fish eagle pondweed | plankton | smallish | fish eagle D_ | pondweed | tadpole | fisheagle | large fish 53 Which process is described as the movement of molecules from a region of high concentration to @ region of low concentration? A active transport B diffusion 2 © osmosis a D transloc: ee2 54 The diagram shows the human skin, Which part is a capillary? 354 A012 1 Which parts are numbered 1, 2 and 37 4 2 3 A renal vein urethra ureter B renal vein ureter urethra c renal artery ureter urethra D renal artery urethra ureter gS L © BEC 2019 oses/ot/omnig [Turn over56 87 Aor 58 ie 22 The diagram shows an animal cell cut in half. co ( 9 What is the name of part X? A cell wall B_ cell membrane © cytoplasm D_ nucleus Which labelled structure shows an anther? A germinating bean seed is soaked in iodine solution for a few minutes. The cotyledon is stained brown. Which statement is true about the observation? A Proteins are present. Proteins have been converted to amino acids. B © Starch has been converted to glucose. D_ Starch is present. © BEC 2019 056901/01NN19356 2 23 59. The graph shows changes in a student's breathing rate as the student walks, then climbs a hill and reaches the top of the hil number of starts: starts: reaches walking climbing _top of hill Why does the student's breathing rate continue to be at a higher level for some time, after the student reached the top of the hill? ‘A more glucose is being used up B__ more lactic acid is being oxidised © the student's muscles are respiring slowly D the student needs more energy 60 The diagram shows the female reproductive system. in Structure X produces the hormone oestrogen. Which method of birth control contains the hormone oestrogen? A. diaphragm B pill © spermicide D sterilisation emission fejroouce Waa where Third pary owne® malo pralsed by Sopyaghl me Weuded Fas book SougH and Gated where posabie. Brey Feasonaie efor nas been made by tna publahor (BEC) to ae eopght halos, buf eny Ham aqutng Clearance have unwitngl been included, fm uber wl be lasted o make amends at he surest posse cpopty © BEC 2019, oses/ot/omt924 “(d:13) eunsseud pue eumeieduse} woos ye glup 72 5} S86 Aue jo ajow! au Jo euunjon ey, =] =], ] or = = a = = = wa” | emo” | unt | wumaeg” | smn ~ aA wy a on fa a PS. 3 ws wg sw | ow | om | mo | o | om | creer | set | sma | wa | unm | arn” | avi | si” | ao | ama | wma” | ann | arma | anima” | RU CRE) UE ng |S) aq oN | PW | wd | sa vn ya | wig | wy | ond | oN n ed uw trautsowoe=X) XK | fay « 2 ul al #] = a) =| | ow) oo 5 rem | ena | pe | uaa | | arse ew °0 | oa | oom | oo") en”) om”) on SH | my | uw | a | so we | oo | se | om | ow eae eater >) po) By | Pd | ue | one a {om | om | oe | om a a2 | men | tn | ano |e wi}n om | oo | ed o | | @ « | 6 7 a H ‘dnoig eel ‘SiuaUiayy 9up JO 819e DIPoHeY Oy, (133HS WLW se oss9/01/0mN19 OBE z09a BOTSWANA EXAMINATIONS COUNCIL + Botswana General Certificate of Secondary Education SCIENCE : DOUBLE AWARD 0569/01 Paper 1 Multiple Choice October/November 2018 1 hour 30 minutes Additional Materials: Multiple Choice Answer Sheat ‘Soft Clean Eraser Soft Pencil (type B or HB) READ THESE INSTRUCTIONS FIRST Do not open this booklet until you are told to do so. Read the instructions on the separate Answer Sheet very carefull. Write your name, Centre number and candidate number in the spaces provided on the Answer Sheet unless this has already been done for you ‘Sign your name in the space provided on the Answer Sheet. 231 There are sixty questions in 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 using a soft pencil on the separate Answer Sheet Each correct answer will score one mark. A mark will not be deducted for a wrong answer. ‘Any rough working should be done in this booklet. / Do not use staples, paper clips, highlighters, glue or correction fluid. | You may use a calculator, 4 A copy of the Periodic Table is printed on page 24. aoxT ie This document consists of 22 printed pages and 2 blank pages. BEC 2018 Turn overiz 1 The diagram shows part of a micrometer screw gauge scale that was used to measure the thickness of an iron rod. ‘What is the thickness of the iron rod? A B c D 2.58mm 12.58mm 13.30mm 20.50mm. 2 Which quantity is measured in newton metres? A B c D force moment power speed 3 A bucket falls into a well from the ground level. The bucket takes 2.55 to reach the water surface. ‘What is the distance moved by the bucket to the water surface? (g= 10m/s*) A B c D 12.50m 25.00m 31.25m 62.50m ene 2018 ossa1ov/on183 4 The diagrams show the speed-time graphs of some cars. Which graph is for a car accelerating from rest? A B ’ speed speed 0 o 0 time 0 time c D A speed speed 0- 7" ee 0 time 0 time 5 Asolid is heated and it expands. Which statement explains the change taking place in the solid? A the mass of particles increases B__ the number of particles increases the particles increase in size D the space between particles increases 6 Methylated spirit is poured into an open container. After some time all the spirit has disappeared into the air. ‘Which process describes what has happened to the spirit? A. boiling B condensation © evaporation D__ melting ose 2018 os6910 11018 [Turn over4 7 The diagram shows a liquid-in-glass thermometer. ‘The distance between ~10°C and 110°C is 25cm. -10°C 110°C What is the temperature when the end of the liquid thread is 10cm from the -10°C mark? A 38°C B 40°C Cc 44°C D 48°C 8 What ate the characteristics of an image formed by a magnifying glass? A. realand erect B real and inverted virtual and erect D virtual and inverted 9 The diagram represents the electromagnetic wave spectrum with three components given. radio waves | microwaves 1 2 3 4 gamma rays Which components are represented by the numbers 2 and 3? 2 3 A_ | visible light ultraviolet B_ | visible light infra-red C | ultraviolet visible light D_ | ultraviolet infra-red BEC 2018 0s69/01/01N/18i 5 40 A soldier fires a gun and hears an echo from a nearby cliff 2.5s later. The speed of sound in air is 320 m/s. How far is the cliff from the soldier? A 256m B 400m © 800m D 1600m 11. The list shows the stages of charging a suspended metallic sphere by induction The stages are not in the correct order. {i)_ touch the sphere with a finger for a short period of time and remove the finger (ii) place a charged rod next to the sphere (ili) remove the rod What is the correct order of the stages? A (ii), (®, (ill) B iii). @. (i) © (i), Gi, @) D (it, @), @ 412. The diagram shows two coils, P and Q, wound around soft iron cores and placed next to each other. Coil P is connected to a battery and coil Q is connected to a centre zero galvanometer. soft iron Wh TTT exticn hee fg, ) What observation would be made on the centre zero galvanometer when switch S is closed? A it deflects and returns to zero B it deflects continuously back and forth C it deflects to one end and remains there D it remains at the centre pec 2018 0569011018 [Turn over6 13. Which diagram correctly shows the standpoint and the polarities of two iron pins hanging from one end of a bar magnet? A B c D N Ss N N Ss n\ /s sy XS S| 'S s N N N N NUN 14 Which electrical quantity is defined as “the rate of flow of electric charge”? A current B_ electromotive force C potential difference D_ power 15 Which circuit diagram shows the correct connection of an ammeter and a voltmeter in a circuit to determine the resistance of resistor R? * h--4s ® 4-4 © @BEC 2018 0569/0 V/01N18,16 Which unit is equivalent to a volt? A. joule/coulomb B_ joule/second © ohm/ampere D_ watt/coulomb 47 Whatis the most suitable fuse rating for an electric iron rated 2000W, 240V? A 5A B 7A c BA D 10A 18 Some resistors are connected to give a total resistance of 5.02. Which diagram shows the arrangement of the resistors? A 22 B 100 ja 30 409 c 20 30 D 10 30 + +4 4 2a See 49. Which radioactive emissions are deflected by an electric field? A alpha and beta alpha and gamma alpha, beta and gamma goo beta and gamma a © BEC 2016 osss.0v/01Nrt8 [Turn over8 20 A radioactive source that emits alpha, beta and gamma radiations is placed in front of a G-M tube. A sheet of paper and a 5mm aluminium sheet are placed between the source and the G-M tube as shown in the diagram. radioactive source GM tube of ee 5mm alumi sheet Which radiations are detected at positions X and Y? position X position Y A alpha, gamma gamma B beta, gamma gamma © | alpha, beta beta D | alpha, beta alpha 21 What does the nucleus of rhodium, "$2 Rh contain? A 58 electrons and 45 neutrons B 58 electrons and 58 protons © 48 protons and 58 neutrons D 48 protons and 103 neutrons te @BEC 2018 O568/01/01N189 22 Which method is suitable for collecting an alkaline gas that is more dense than air and soluble in water? 8 mea tty gas e calcium |! oxide ary gas water c D calcium concentrated gas oxide sulphuric acid 23. Sodium nitrate can be prepared by titrating dilute nitric acid against sodium carbonate solution. ‘Which conclusion can be drawn from this information? A Sodium carbonate is a base. B_ Sodium carbonate is soluble in water. € Sodium nitrate is a base. D Sodium nitrate is insoluble in water. 24. Metal X can be obtained from its ore by heating a mixture of the ore and carbon. What could be metal X? A. calcium B gold © sodium D zinc @BEC 208 0s6901/0N8 [Turn over10 25 Aqueous sodium hydroxide solution is added to a mixture of solution X and metal Y as shown. damp red litmus Paper turns blue oa aqueous sodium hydroxide solution Ol mixture of solution ae. X and metal Y heat What could solution X and metal Y be? solution X metal Y A | ammonium chloride aluminium B | ammonium chloride zine c sodium nitrate aluminium D sodium nitrate zine 26 What is the mass of aluminium in 204 g of aluminium oxide, Al,0;? A 279 B 54g © 106g D 108g 27 Which gas would diffuse most slowly? A ammonia, NH B_ methane, CH, oxygen, O; D sulphur dioxide, SO. eBEC 2018 osesrionnie1 28 The diagram shows the electrolysis of copper(II) sulphate solution using carbon electrodes. ‘What is produced at the anode? carbon electrodes copper(II) sulphate solution copper metal copper(II) ions hydrogen gas oxygen gas gou> 29 A sample of water forms some scum with soap solution before and after boiling. What could be the correct type of hardness and the salt present in the sample? type of hardness salt present A “permanent ‘calcium hydrogen carbonate B permanent calcium sulphate c ~ temporary calcium hydrogen carbonate D temporary calcium sulphate | Ee BEC 2018 osesrorionvi [Turn over12 30_A strip of iron is placed in each of the four test-tubes, with a solution of a different metal nitrate in ‘each tube, as shown, In which test-tube will a reaction take place? A aqueous calcium nitrate B c D iron iron aqueous aqueous aqueous zinc copper(II) iron(II) nitrate nitrate nitrate 31. The equation for the reaction of ethanol and oxygen is shown. C2HsOH\(I) + x02) ——» yCO,(g) + 2H,0(g) Which values of x, y and z balance this equation? oBEC 208 x y z A 2 2 1 B 2 2 3 c 3 2 r D 3 2 3 069101/0NI1813 32 Which process is endothermic? A combustion B condensation © neutralization D__ photosynthesis 33. The equation for the reaction between calcium carbonate and 0.2mol/dm* hydrochloric acid is shown. CaCO,(s) + 2HCl(aq) ———+ CaCi,(aq) + H20(!) + CO2(9) Which change will increase the rate of the reaction? A. increasing the pressure B__ increasing the volume of the acid © using larger pieces of calcium carbonate D__ using powdered calcium carbonate 34 Why is magnesium less electronegative than chlorine? Magnesium has fewer A. electrons. B__ electrons in the outer shell. number of shells. D protons. 35 What is the bonding type of sodium chloride and the bonding type of graphite? sodium chloride graphite A covalent B covalent covalent c ionic covalent D lonic ionic BEC 208 ossarovonvis [Turn over14 36 The diagram shows a fractionating column used to separate the components in crude oil ‘Which fraction could be petrol? A B c D i. natural gases te I =a i— iB D (Ctumen 37 Which air pollutant cannot be controlled by the use of catalytic convertors? carbon monoxide oxides of nitrogen ‘sulphur dioxide unburnt hydrocarbons 38. In which industrial process is chlorine used? A B c D manufacturing of cement manufacturing of glass manufacturing of plastics softening of hard water 39 An incomplete equation for the reaction of an alkane is shown. CroHae SOO» Cotta + CoH + ¥ What is the name of the reaction and the identity of Y? name of the reaction identity of Y A racking CoH, B combustion CHa c oxidation CoHis D reduction CoHie BEC 2018 osea/ov/oni615 40 The equation for the reaction between zinc and hydrochloric acid is shown. Zn(s) + 2HCKaq) ——> ZnCh(aq) + Ha(a) ‘What is the ionic equation for the reaction between zinc and hydrochloric acid? A B c D Zn(s) + 2H(aq), ——® Zn*(aq) + H.(9) Zn(s) + 2H"(aq) ——» Zn™(aq) + H-(9) Zn(s) + H"(aq)_~ ——» Zn'(aq) + He(g) Zn(s) + He"(aq), ——® Zn*(aq) + Ho(g) 41 The diagram shows a plant cell. What are the functions of the numbered parts in the cell? 1 2 A_ | controls activities of a cell | _ site for photosynthesis B_ | controls activities of a cell| protein synthesis c protein synthesis _| controls activities of a cell D site for respiration site for photosynthesis esec 2018 osserov/onve [Turn over16 42. The diagram shows a set-up of an experiment done by a student. The liquid in the glass tube rose from point X to point Y, beaker 0.5 mol/dm? sugar solution visking tube water Which change can cause the liquid to rise higher than Y? A _ using 0.2mol/dm? sugar solution in the beaker Busing 0.2mol/dm? sugar solution in the Visking tube using 1.0mol/dm? sugar solution in the beaker D using 1.0mol/dm* sugar solution in the Visking tube 43. By which process do green plants lose water through their leaves? A__ photosynthesis B respiration translocation D_ transpiration 44 Which word equation represents anaerobic respiration in yeast? ‘A glucose —» ethanol + carbon dioxide + energy B glucose —> ethanol + water + eneray © glucose —> lactic acid + energy D glucose —+ lactic acid + water + energy ce ene z018 oss9/oV/onie47 45. The diagrams show set-ups used to investigate photosynthesis and respiration. P R black box tokeep ‘out light small ae animal S pond weed In which two set-ups are both photosynthesis and respiration taking place? A PandR B PandS © QandR D Qands 46 Which of the following is not an effect of adrenaline? A increased breathing rate B increased digestion © increased heart rate D increased sweating obec 2018 osse/0vonw1e [Turn over18 ‘47. The diagram shows part of the urinary system. Which part of the system removes urea from the blood? 48 Which conditions are needed for seeds to germinate? ‘A. carbon dioxide and light B carbon dioxide and water ight and suitable temperature D__ water and suitable temperature 49 A food chain is shown. A farmer treated the cabbages with a pesticide, cabbages ——> caterpillars ——» swallows ——> vultures The bar chart represents the concentration of the pesticide in the bodies of each organism in the chain. Which bar represents the concentration of the pesticide in the swallows? concentration of pesticide @ BEC 2018, oses1/oiNis19 ‘50 Awoman has a 28 day menstrual cycle. She starts her menstruation on 10 October. (On which date is the woman most likely to fall pregnant? A 14 October B 24 October C5 November D 10 November 51 In which part of the female reproductive system does implantation take place? A. ovary B_ oviduct C uterus D_ vagina 52. Which row shows sexually transmitted infections that can be treated and that cannot be treated with antibiotics? gonorthoea | HIV/AIDS | syphilis || key ¥ = can be treated with antibiotics A x ¥ v x = cannot be treated with antibiotics B ¥ x v c ¥ x x D x Y x 53. The table shows changes in the concentrations of blood components as the blood flows in and out of an organ. blood component | blood into the organ | blood out of the organ CO; low high O high low urea low high Which organ has the blood passed through? A kidney B liver © lungs D__ stomach nec 2018 oseanvonuie [Turn over20 54 Which of the following elements are found in carbohydrates? A. carbon, hydrogen, oxygen B carbon, oxygen, nitrogen © carbon, phosphorus, nitrogen D carbon, hydrogen, phosphorus 55 The diagram shows an example of asexual reproduction. ‘Which method of asexual reproduction is shown in the diagram? A. binary fission B budding C grafting D spore formation 56 Which part on the diagram produces a fluid that enables sperm cells to swim? BEC 2018 ossarovonyie2 57 A person walks from a cold room into a warm room. Which of these reactions is the first to occur? A dilation of arterioles under the skin B__ more warm blood flowing close to the skin surface C__ stimulation of receptors in the skin D_ sweating 58 Which type of organism is used industrially to make bread? A algae B bacteria fungus D virus 59. Which component of blood has a nucleus? A. platelets B plasma Cred blood cells D_ white blood cells 60 Which type of birth control is the most effective? A hormonal B__ mechanical natural D surgical BEC 2018 os6a01/0nNr822 BLANK PAGE ie eBEC 2018 ssa vons823 BLANK PAGE arnanon reprodice Tame whore Hie pay ied FAIS Polos by copyTGh cued has Daan sought and Geared where pontine Every Feasonabe efit has been made by tn pustere (BEC) fo Wace copyright holder, but any Roms equhg clearance Rave unwliy beon Ince, Me ‘pabisor wl be pleased to make emerds ae eae posse opty © BEC 2018 086910 /0/N18‘(472) ainssaid pue ainjesadusay wioos ye liquid 9 The diagram shows a flask filled with a liquid being heated. capillary tube lask heat When heat is applied, the level of the liquid in the capillary tube drops slightly before it rises. . Which statement explains why the level drops? A B c D © BEC 2017 the flask expands the liquid contracts the flask contracts the liquid expands osserotionui7 [Turn overPe 10 Whatis the SI unit of charge? A B c D ampere coulomb volt watt 11 The diagram shows a radioactive source that emits alpha particles, in front of a detector. radioactive source deter (js ook The count rate from the source is 50 counts/ minute. A sheet of paper is placed between the source and the detector. The count rate becomes 10 counts/ minute. What will be the count rate when the radioactive source is removed? A B c D 10 counts/minute 40 counts/minute 50 counts/minute 60 counts/minute 12 Which of the following electromagnetic waves has the shortest wavelength? A B c D infrared microwaves ultraviolet visible light 13 Which of the following elements is radioactive? A B c D © BEC 2017 aluminium copper iron uranium osse/0t/0nwi77 14 The diagram shows a bell jar, The bell is connected to a power supply. 1F--4 bell -hammer j}-—— bell jar tap MN vacuum pump The bell is switched on, the hammer vibrates against the bell, and air is pumped out of the jar. Which observations will be made as air is slowly removed? rate of hammer vibration sound A teduces fades away B | remains the same fades away ¢c reduces remains the same D | remains the same remains the same 48 A transformer is connected to a 240 mains supply. The primary coil has 50 tums and the secondary coil has 200 tums. What is the voltage in the secondary coil? A 42v B 60V c 250V D 960V 46 A copper wire is coiled around a plastic core and rotated between magnets to induce an electromotive force. Which change will not affect the size of the induced electromotive force? A increasing the speed of rotation reducing the number of turns of the coil © using an aluminium core D using stronger magnets BEC 2017 s6a01/0NAIT [Turn over