Sec 1 2024 Meridian Secondary School Science EOY

1 MSS 1G3 End-of-Year Examination 2024 Lower Secondary Science [Turn over[Turn over Name: Class: Sec _____ Index No.: _______MERIDIAN SECONDARY SCHOOLEND-OF-YEAR EXAMINATION 2024 LOWER SECONDARY SCIENCE SECONDARY 1 G3 9 October 2024BOOKLET A1 hour 30 minutes(for Booklets A and B)Additional Material:OTASREAD THESE INSTRUCTIONS FIRSTWrite in soft pencil.Do not use staples, paper clips, glue or correction fluid. Write your name, class and index number on the OTAS. Section A: Multiple Choice Questions [30 marks]There are thirtyquestions in this booklet. 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 soft pencil on the separate OTAS. Read the instructions on the OTAS very carefully.Each correct answer will score one mark.Any rough working should be done in this booklet. The use of an approved scientific calculator is expected, where appropriate.A copy of the Periodic Table is printed on page 13 of Booklet A.At the end of the exam, hand in Booklet A, Booklet B and OTAS separately.For Examiner’s UseSection AThis question paper consists of 13printed pages. www.KiasuExamPaper.com 160

2 MSS 1G3 End-of-Year Examination 2024 Lower Secondary Science Section AAnswer all questions in the OTAS.1A student needs to use the Bunsen burner to heat a beaker of water. The steps for using the Bunsen burner are listed below but not in the correct order.I. Open the air-hole.II. Close the air-hole.III. Turn on the gas tap.IV. Light up the Bunsen burner.What is the correct order of the steps?AI, III, II, IVBII, III, IV, ICIII, I, IV, IIDIII, II, IV, I2A liquid chemical reacts violently with metals. When it comes into contact with bare skin, it causes severe burning sensation and damage to the skin.What hazard symbol should be used to label this chemical?A BCD www.KiasuExamPaper.com 161

3 MSS 1G3 End-of-Year Examination 2024 Lower Secondary Science [Turn over[Turn over 3In an experiment, Min Dee and Nabil took multiple measurements of the mass of an object. Their results are shown below.Min Dee’s measurements:mass / g 10 10.2 10.5 9.7Nabil’s measurements:mass / g 9.1 9.2 9.2 9.3Given that the actual mass of the object is 10.0 g, which statement is correct about the measurements obtained by Min Dee and Nabil?ANabil’s measurements are more accurate because they are closer to one another.BMin Dee’s measurements are more precise because they are closer to the actual mass.CNabil’s measurements are more precise because they are closer to one another.DMin Dee’smeasurements are more accurate because they are closer to one another.4Electrical wires are commonly made of copper.Which properties of copper make it a suitable material?Alow electrical conductivity, easily malleableBhigh electrical conductivity, easily malleableClow electrical conductivity, shiny appearanceDhigh electrical conductivity, shiny appearance5A solid block of metal is cut into two equal halves.What are the differences in the mass and density of one half of the block compared to the original block?mass densityA same sameB same smallerC smaller smallerD smaller samewww.KiasuExamPaper.com 162

4 MSS 1G3 End-of-Year Examination 2024 Lower Secondary Science 6Which of the following diagrams shows a mixture of elements?ABCD7Limestone breaks down to form carbon dioxide and calcium oxide when heated.Which statement explains the observation?ALimestone has a high melting point.BLimestone is made up of three atoms chemically combined.CLimestone has changed its state from solid to liquid.DLimestone is made up of three elements chemically combined.8Three tablespoons of flour are added to a beaker of water. The mixture is stirred for a minute.What observation can be made after the beaker is left standing for 30 minutes? AA clear solution is formed at the top of the beaker.BLight cannot easily pass through.CHeat is released from the beaker.DThe flour dissolves completely in water. www.KiasuExamPaper.com 163

5 MSS 1G3 End-of-Year Examination 2024 Lower Secondary Science [Turn over[Turn over 9Which of the following statements concerning the Periodic Table is correct?AAll elements in the same period have the same number of protons.BAll elements in the same group have the same number of outermost electrons.CElements in the same group have the same number of electron shells.DElements in the same group exist in the same state.10Which of the following can be separated from metal waste using magnetic attraction?Aaluminum potsBcopper coinsCiron gate grillesDzinc rooftopsFor questions 11 to13, refer to the diagram below.The diagram shows an experimental set-up to separate salt and water.11What is the purpose of X? Ato cool and condense the water vapour into liquidBto heat up the mixture in the flaskCto ensure smooth boiling of the waterDto measure the temperature of water vapour water inwater outX www.KiasuExamPaper.com 164

6 MSS 1G3 End-of-Year Examination 2024 Lower Secondary Science 12Which of the following correctlyidentifies the mistake made in the set-up?Athe volume of water in the beaker is reaching the brimBa round-bottom flask is used for heating instead of a conical flask Cthe bulb of the thermometer is placed too near the exit of the flask Dthe water entering and exiting the condenser is in the wrong direction 13Which row correctly identifies the location of salt and pure water the end of the experiment?salt pure waterAin the round-bottom flask in the round-bottom flaskBin the beaker in the beakerCin the round-bottom flask in the beakerDin the surrounding air in the surrounding air14The NEWater process recycles Singapore’s used water into ultra-clean, high-grade reclaimed water.Which is the correct sequence of processes from stage 1 to 3?Amicrofiltration reverse osmosis ultraviolet disinfectionBultraviolet disinfection microfiltration reverse osmosis Creverse osmosis ultraviolet disinfection microfiltrationDmicrofiltration ultraviolet disinfection reverse osmosis treatment in NEWater plantused waterNEWaterstage 1stage 2stage 3www.KiasuExamPaper.com 165

7 MSS 1G3 End-of-Year Examination 2024 Lower Secondary Science [Turn over[Turn over 15Which statement is incorrectabout light?ALight is a form of energy.BLight always travels in straight lines.CLight cannot travel in vacuum.DLight travels faster than sound.16When Jane looks at the surface of a calm pool of water, she sees an image of her face. However when she looks at a white concrete wall, she is not able to see any image of her face.Which statement explains this observation?AThe light rays are all absorbed by the concrete wall.BThe light rays all passed through the concrete wall.CThe light rays are reflected from the concrete wall in the same direction.DThe light rays are reflected from the concrete wall in different directions.17The diagram shows the reflection of a light ray from a plane mirror.What are the angles of incidence and reflection?angle of incidence /° angle of reflection /° A 30 30B 60 60C 30 120D 60 120 plane mirror 30o 30o www.KiasuExamPaper.com 166

8 MSS 1G3 End-of-Year Examination 2024 Lower Secondary Science 18Which row correctly describes the properties of an image seen in a convex mirror?size of image field of visionA diminished wideB diminished narrowC magnified wideD magnified narrow19What is the function of the cell membrane?Aallows photosynthesis to take place Bcontrols movement of substances in and out of the cell Cprovides energy for the cellDsite for chemical reactions to take place20