Sec 1 2024 HSS Science EOY

Secondary 1 General Science 3 NAME: ( ) CLASS: 1PAPER 1 MULTIPLE CHOICEThursday, 03 Oct 2024 Total Duration for Paper 1 and 2:1 hour 45 minutesGRATITUDERESPECTEMPATHYADAPTABILITYTRUSTWORTHINESSGRATITUDERESPECTEMPATHYADAPTABILITYTRUSTWORTHINESSGRATITUDE GRATITUDERESPECTEMPATHYADAPTABILITYTRUSTWORTHINESSGRATITUDERESPECTEMPATHYADAPTABILITYTRUSTWORTHINESSGRATITUDE GRATITUDERESPECTEMPATHYADAPTABILITYTRUSTWORTHINESSGRATITUDERESPECTEMPATHYADAPTABILITYTRUSTWORTHINESSGRATITUDE GRATITUDERESPECTEMPATHYADAPTABILITYTRUSTWORTHINESSGRATITUDERESPECTEMPATHYADAPTABILITYTRUSTWORTHINESSGRATITUDE Additional Materials: Optical Answer Sheet (OAS)READ THESE INSTRUCTIONS FIRSTWrite in soft pencil.Do not use staples, paper clips, glue or correction fluid.Write your name, register number and class on this question paper and on the Answer Sheet(OAS) in the spaces provided. There are twenty-fivequestions on this paper. Answer allquestions. For each question there are four possible answers A, B, CandD.Choose the oneyou consider correct and record your choice in soft pencilon the OAS provided. 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.A copy of the Periodic Table is printed on page 12in this paper.The use of an approved scientific calculator is expected, where appropriate. This document consists of12printed pages (including this cover page).[Turn over HOUGANG SECONDARY SCHOOLEND-OF-YEAR EXAMINATION / 2024 GENERAL SCIENCE 3 SECONDARY ONE www.KiasuExamPaper.com 46

2 Secondary 1 General Science 3 1The statements describe the scientific method of demonstrating ways of thinking and doing in science.1 pose questions and define problems2 make observation of a phenomenon3 evaluate and communicate findings 4 plan and conduct experiments5 propose a hypothesisWhich order shows the correct sequence of the scientific method?A1245B254C251D41522The table shows four investigation topics for a study on eating habits of youths.topics1 investigating the average mass of food consumed.2 investigating the reasons for the eating habits of youth.3 investigating the number of meals per day among youths.4 investigating the types of food usually consumed by youths.Which pair of investigations will require the collection of qualitative data?A1 and 2B1 and 3C2 and 3D2 and 43These hazard symbols were found on a bottle of chemical.What are the potential hazards of using the chemical?AThe chemical is carcinogenic and flammable.BThe chemical is carcinogenic and oxidising.CThe chemical is toxic and flammable.DThe chemical is toxic and oxidising. www.KiasuExamPaper.com 47

3 Secondary 1 General Science 3 4Which unit is an SI unit?AcmBoCCKDmm5Three students each weigheda 20.0 g mass three times using different electronic balances. Their readings are shown in the table.studentmass / greading 1 reading 2 reading 3 average reading1 19.5 20.4 19.8 19.92 23.2 23.1 23.2 23.23 20.6 20.0 20.3 20.3Which student had the most accurate and most precise readings?most accurate readings most precise readingsA1 2 B 1 3 C2 1D2 3 6The table shows the scale of hardness of five different materials M, N, O, P and Q. The greater the hardness value, the harder is the material.material M N O P Qhardness value 7 3 9 2 1Which statement about these five materials is correct?AM can scratch material O and P.BN can scratch material P but not O.CP can scratch M but not Q.DQ can scratch all the other materials shown in the table.www.KiasuExamPaper.com 48

4 Secondary 1 General Science 3 7A studentused a measuring cylinder filled with some water to measure the volume of a ring. The diagrams show the readings before and after the ring was placed in the measuring cylinder. Which row shows the correct measurement of volume?initial volume / cm3final volume / cm3volume of the ring / cm3A2.60 6.60 4.00 B 2.60 6.70 4.10 C2.70 6.70 4.00D3.40 7.40 4.00 8Four identical rods of different materials, A,B,CandDwere heated to 100 °C.They were left to cool over a period of ten minutes and their temperatures were recorded in the graph shown.Which material is most likely used for making a container to keep food warm? before after 123678 temperature / oCtime/min100010DCBAwww.KiasuExamPaper.com 49

5 Secondary 1 General Science 3 9Which group of substances contains only non-metallic elements?Ahydrogen, carbon, sulfur, neonBlithium, boron, carbon, fluorineCmercury, argon, xenon, fluorineDsodium, aluminium, magnesium, lead10The table shows some information about three solids, X, Y and Z.solid % composition by mass strongly heated in airX fixed meltsY varies burnsZ fixedbreaks down into simpler substancesWhich statement about these three solids is correct?AX and Y are mixtures.BX is a compound.CY is an element.DZ is a compound.11The table shows the chemical formulae of some compounds found in three different metal ores.name of ore chemical formula argentite Ag2S chromite FeCr2O4galena PbSWhich statement is incorrect?AThe only ore that contains the least number of different elements is galena.BThere are at least two ores containing sulfur.CThere is only one ore that contains three different elements.DWe can extract iron from only one of the ores.www.KiasuExamPaper.com 50

6 Secondary 1 General Science 3 12An equal amount of sugar is added to equal volume of water under different conditions. Which set of conditions will cause sugar to dissolve fastest?temperature of water / °Csize of sugarA 20.0 large B20.0 small C 80.0 largeD 80.0 small 13Which mixture can be separated by magnetic attraction?Acopper and gold coinsBiron and brass fillingsCiron and steel pinsDplastic and aluminium foil14Which two separation techniques are used to purify sewage water to obtain NEWater?Adistillation and filtrationBmicrofiltration and evaporationCmicrofiltration and reverse osmosisDsimple distillation and chromatography www.KiasuExamPaper.com 51

7 Secondary 1 General Science 3 15The diagram shows a set-up to separate the components of a mixture, Z.Which row about X, Y and Z is correct?X Y Z Awater in water out salt solutionB water in water out solid salt and sandC water out water in salt solutionDwater out water in solid salt and sand16Which statement best explains why we can see non-luminous objects?AThe objects absorb the light rays.BThe objects bend the light rays so that the light rays can enter our eyes.CThe objects give out light on their own.DThe objects reflect light off their surfaces into our eyes. mixture Z Y conical flask round-bottomed flask X www.KiasuExamPaper.com 52

8 Secondary 1 General Science 3 17The diagram shows light rays hitting a surface.Which row correctly describes the diagram?type of reflection material of reflecting surfaceimage formedAirregular mirrorclearBirregular paperno image formedC regular glassclearDregular still waterno image formed18A ray of light is directed onto a mirror that is tilted at an angle of 20ofrom the table as shown in the diagram. The diagram is not d