Sec 1 2024 JWSS Science EOY

Class Index NumberName: Setter: Mdm Juliana and Mr Chong WL Page 1of 31 Jurong West Secondary SchoolEnd-of-Year Examinations 2024 100Additional material: Multiple Choice Answer Sheet.READ THESE INSTRUCTIONS FIRSTWrite your name, class and index number on all the work you hand in.Write in dark blue or black pen.You may use an HB pencil for any diagrams, graphs, tables or rough working.Do not use staples, paper clips, glue or correction fluid.The use of an approved scientific calculator is expected, where appropriate.You may lose marks if you do not show your working or if you do not use appropriate units.Section AThere are thirty questions. Answer allquestions. For each question there are four possible answers A,B,CandD. Choose the oneyou consider correct and record your choice in the multiple choice answer sheet provided.Read the instructions on the Answer Sheet very carefully.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 question paper.Section BAnswer allquestions in the spaces provided. The number of marks is given in brackets [ ] at the end of each question or part question.Section CAnswer onequestion in this section in the spaces provided. A copy of the Periodic Table is printed on page 31. There are a total of 31printed pages (including the cover page) LOWER SECONDARY SCIENCE Secondary One G3 (EXP)Wednesday25 September 20240800 - 09451 hour 45 minutes After checking of answer scriptChecked bySignatureDateStudentwww.KiasuExamPaper.com 86

JWSS End-of-Year Examinations 2024 Lower Secondary Science Secondary 1G3 Page 2of 31 Section A: Multiple Choice (30 marks)Answer allquestions.For each question there are four possible answers A,B,Cand D. Choose the one you consider correct and record your choice in the multiple choice answer sheet.A1Thomas observed that in the month of November and December, the number of days it rained were 19 and 17 days per month respectively. He hypothesised that Novemberwas the month where it rained the most in a year. Thomas then recorded the number of rainy days in a month until the next November. Why did Thomas record the number of rainy days in a month until the next November? AHe wanted to ask a question.BHe wanted to draw a conclusion.CHe wanted to explain the high rainfall in August.DHe wanted to form a hypothesis.A2Concentrated sulfuric acid is a corrosive substance. Which hazard symbol should be labelled on a container of concentrated sulfuric acid? A B C DA3Which is notan SI unit? AgBKCm3Ds www.KiasuExamPaper.com 87

JWSS End-of-Year Examinations 2024 Lower Secondary Science Secondary 1G3 Page 3of 31 A4The boiling point of liquid Pis lower than that of water.The student places a thermometer in boiling liquid P.The diagram below shows part of the stem of this thermometer without numbers. What is the boiling point of liquid P? A85.5°CB94.5 °CC100.0 °CD105.5 °Cmercury www.KiasuExamPaper.com 88

JWSS End-of-Year Examinations 2024 Lower Secondary Science Secondary 1G3 Page 4of 31 A5Five identical metal spheres are measured, in centimetres, as shown in the diagram using a ruler.What is the radius of each metal sphere?A1.2 cmB1.6 cmC2.4 cmD3.2 cmA6Plastic screen protectors for mobile devices can be scratched easily. Tempered glass screen protectors are less easily scratched.Which physical property of a material will prevent it from being scratched easily?AconductivityBflexibilityChardnessDstrengthA7An object has a high melting point. It is a poor conductor of heat and is hard but fragile.What material could this object be made of? AceramicBfibreCmetalDplastic www.KiasuExamPaper.com 89

JWSS End-of-Year Examinations 2024 Lower Secondary Science Secondary 1G3 Page 5of 31 A8What is the function of the part labelled X?Ato cut food sample for measurementBto help balance the digital calipersCto mark out the outline of an object for measurementDto measure the depth of a small test tubeA9Which statement about the Periodic Table is correct?AElements in the same group have similar physical properties. BElements in the same group must be all metals, or all non-metals. CThe Periodic Table does not show any compound or mixture. DThe properties of elements change from non-metallic to metallicacross each horizontal row. X www.KiasuExamPaper.com 90

JWSS End-of-Year Examinations 2024 Lower Secondary Science Secondary 1G3 Page 6of 31 A10Which diagram represents a mixture of an element and two compounds?A BC DA11Thomasadded a teaspoon of sugar and salt to a small beaker containing water and then stirred it. What is formed? AA solution containing one solute and two solvents.BA solution containing one solvent and two solutes.CSugar and salt will react with each other in water and form a suspension.DSugar, salt and water will react and form a compound.A12Which statements correctly describe a suspension?1. A suspension can be separated by filtration.2. A suspension allows light to pass through it fully. 3. Insoluble substances can be seen in a suspension. A1 and 2 onlyB1 and 3 onlyC2 and 3 onlyD1, 2 and 3 www.KiasuExamPaper.com 91

JWSS End-of-Year Examinations 2024 Lower Secondary Science Secondary 1G3 Page 7of 31 A13The table below shows the colours of four solids and their solubilities in water.solid colour solubility in waterW green insolubleX green solubleY brown insolubleZ brown solubleA mixture containing two of the solids is added to excess water, stirred and filtered. Agreen filtrate and a brown residue are obtained. Which two solids are present in the mixture?AW and XBW and YCX and YDX and ZA14Which mixture cannotbe separated by magnetic attraction?Acobalt and copperBgold and nickelCiron and cobaltDsulfur and steelA15Which substance can be obtained from a solution by evaporation to dryness?Aindividual food colouringBpure waterCsugarDtable saltwww.KiasuExamPaper.com 92

JWSS End-of-Year Examinations 2024 Lower Secondary Science Secondary 1G3 Page 8of 31 A16In 2003, Singapore launched our very own NEWater. To produce NEWater, sewageor used water must undergo two separation techniques in succession before clean drinkable water is obtained. Which two separation techniques are used to produce drinkable water from sewage or used water?Amagnetic separation and chromatographyBmicrofiltration and reverse osmosisCmicrofiltration and simple distillationDsimple distillation and chromatographyA17What is the angle of reflection for the ray of light below?The diagram is not drawn to scale. A20°B40°C50°D60° table mirror 20 40 www.KiasuExamPaper.com 93

JWSS End-of-Year Examinations 2024 Lower Secondary Science Secondary 1G3 Page 9of 31 A18The diagram below shows how white light behaves after it passes through a triangularprism. What is the colour formed on the white screen indicated by Q? AgreenBredCvioletDwhiteA19Aliff shines a torch onto a rectangular glass block, as shown in the diagram below. Which diagram below shows how the ray of light from the torch travels through the glass block?A BC D Qtriangular prismwhite light raywhite screen airglass blockray of light from torch www.KiasuExamPaper.com 94

JWSS End-of-Year Examinations 2024 Lower Secondary Science Secondary 1G3 Page 10of 31 A20Clairelooks at the light bulb in the bathroom mirror. Water vapour from the hot bath has condensed on the mirror to form water droplets. She sees a distorted image of the light bulb. Which statement explains what Claire sees?AThe light rays are absorbed by the water droplets.BThe light rays reflect at different angles due to the water droplets.CThere is regular reflection of light by the water droplets.DThere is regular refraction of light by the mirror.A21Why is the heart considered an organ?AItconsists of a group of heart muscle cells contracting and relaxing rhythmically. BItconsists of di