Sec 1 2024 AES Science EOY

Name: ……………………………………………( ) Teaching Group: ………… Booklet A consists of 14 printed pages including this page.[Turn over ASSUMPTION ENGLISH SCHOOLEND OF YEAR EXAMINATION 2024 LOWER SECONDARY SCIENCEBOOKLET AASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOLASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOLASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOLASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOLASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOLLEVEL:Sec 1 G3DATE:9 October 2024TEACHING GROUPS:TG 1, TG 2 & TG 5DURATION:2 hours(For Booklets Aand B)Additional Materials provided: OAS PaperINSTRUCTIONS TO CANDIDATESDo not open this booklet until you are told to do so.Write your NAME, INDEX NUMBER and TEACHING GROUP at the top of this page and on the OAS paper.Shade your index number on the OAS paper. This paper consists of 2 sections. Booklet A: Section A - Multiple-Choice QuestionsBooklet B: Section B - Structured QuestionsSECTION A (30 marks)Multiple-Choice Questions There are 30 questions in this section. Answer allquestions. For each question, there are four possible answers A, B, C and D.Choose the correct answer and record your choice in soft or 2B pencil on the OAS paper provided. DO NOT fold or bend the OAS paper.A Periodic Table can be found on the last page of Booklet B. At the end of the examination, hand in your OAS paper, Booklets AandBseparately. www.KiasuExamPaper.com 2

2 LSS/1G3/EOY/24 Section A: Multiple-Choice Questions (30 marks)There are thirtyquestions in this section. Answer allquestions. For each question, there are four possible answers, A,B,Cand D. Choose the oneyou consider correct and record your choice on the OAS paper in soft pencil.1Which example is nota responsible application of scientific knowledge?Ausing antibiotics to treat a bacterial infectionBusing drugs in sports to improve performance Cusing genetically modified crops to increase food productionDusing solar energy to generate electricity 2Which statement gives an example of qualitative data?Acounting the number of apples that turned brown after a dayBmeasuring the change in height of a plant over a monthCrecording the colour change of a solution as it is heatedDtiming the duration of an experiment3Which S.I. unit is incorrectlymatched to the physical quantity? physical quantity S.I. unitAlength metre (m)Bmass kilogram (kg)Ctemperature Kelvin (K)Dtime hour (h)www.KiasuExamPaper.com 3

3 LSS/1G3/EOY/24[Turn over 4A canister of hydrogen cyanide was labelled with the hazard symbols shown. What do these hazard symbols mean?Acorrosive and flammableBflammable and irritableCharmful and radioactiveDtoxic and explosive5Which diagram shows a result with high accuracy andhigh precision? A BC D www.KiasuExamPaper.com 4

4 LSS/1G3/EOY/24 6A Bunsen burner was lit and the flame was observed to have different regions with different intensity of blue colour. Which row describes the flame and the air hole of the Bunsen burner? type of flame air holeAluminous closedBluminous openCnon-luminous closedDnon-luminous open7An electronic balance reads 28.5 g when an apple is placed on it.It has a zero error of –0.1 g.What is the actual mass of the apple? A27.5 gB28.4 gC28.5 gD28.6 g blue dark blue pale blue www.KiasuExamPaper.com 5

5 LSS/1G3/EOY/24[Turn over 8Which statements are possible uses of digital calipers?I to measure the diameter of a ping pong ballII to measure the height of a studentIII to measure the internal diameter of a small beakerIV to measure the length of a A4-size textbookAI and III onlyBII and IV onlyCI, II and III onlyDII, III and IV only9A student investigates how the temperature of a beaker of water changes with time as it is heated. The diagrams show the readings on his stopwatch as the water reaches different temperatures. What is the time taken for the temperature to rise from 80°C to 100°C? A1 min 54 sB2 min 06 sC3 min 46 sD5 min 40 s www.KiasuExamPaper.com 6

6 LSS/1G3/EOY/24 10The diagram shows a measuring cylinder used to measure the volume of a small stone. What is the volume of the stone? A4 cm3B8 cm3C18 cm3D26 cm311The Mohs scale is often used to compare the hardness of different materials.The higher the number, the harder the material.The table shows the hardness of four different materials, J, K, L and M.material J K L Mhardness 4 3 7 5Which statement is true? AMaterial K can scratch all other materials.BMaterial J can scratch material M but not material K.CMaterial M can scratch material K but not material L. DMaterial J and K together can scratch material L. www.KiasuExamPaper.com 7

7 LSS/1G3/EOY/24[Turn over 12The Singapore Green Plan 2030 promotes environmental sustainability.An example is to encourage people to use reusable cloth bags by implementing a plastic bag charge at supermarkets. Which statement is notcorrect?ACloth bags are single-use while plastic bags can be reused many times.BCloth bags are strong and flexible.CPlastic bags are non-biodegradable and cannot be decomposed naturally.DPlastic bags can break down to form microplastics over time.13Which statement about compounds and mixtures is correct?ACompounds can be easily separated into their constituents.BCompounds do not have fixed compositions.CMixtures can only contain elements.DMixtures have the same properties as their constituents. 14The diagram shows an outline of the Periodic Table.The positions of four elements are shown.Which element is a non-metal? B A C Dwww.KiasuExamPaper.com 8

8 LSS/1G3/EOY/24 15The diagram shows an experimental set-up.What are P, Q and R? P Q RAconical flask channeler residueBconical flask condenser distillateCdistillation flask channeler residueDdistillation flask condenser distillate www.KiasuExamPaper.com 9

9 LSS/1G3/EOY/24[Turn over 16The image shows a mirror placed at a road junction.Which row is correct about the type and function of the mirror? type of mirror functionAconcave give a magnified image of the carsBconcave give a wide vision of the roadCconvex give a magnified image of the carsDconvex give a wide vision of the road17The diagram shows a beam of light hitting and reflecting from a surface.Which statement is true? AA clear image will be formed. BEach light ray is reflected in the same direction. CThe angle of reflection of each light ray is equal to the angle of incidence.DThe surface is smooth. www.KiasuExamPaper.com 10

10 LSS/1G3/EOY/24 18A ballet teacher, T, stands in front of a plane mirror with three students, S1, S2 and S3. Which student(s) will the teacher notbe able to see in the mirror?AS1 onlyBS3 onlyCS1 and S2 onlyDS1 and S3 only19Which example is notcaused by the refraction of light?AA fishing rod appears bent when placed in a sea water.BObjects appear larger under a magnifying glass.CSunlight gets dispersed into seven colours after rain, forming a rainbow.DWe see our image on the surface of a puddle of water after a downpour.20Which example is a harmful effect of electromagnetic radiation? Adisinfection of medical equipment using ultraviolet lightBoverexposure to ultraviolet radiation causing skin cancer CLED bulbs lighting up our homes at nightDuse of infrared thermometer to screen people for fever at the airport www.KiasuExamPaper.com 11