Sec 1 2024 Peicai Secondary School Science EOY

This document consists of 25 printed pages and 1 blank page. Setter: Ms Han Lijun PEICAI SECONDARY SCHOOL SECONDARY ONE G3 END OF YEAR EXAMINATION 2024 CANDIDATE NAMECLASS REGISTER NUMBERSCIENCE 2 October 2024 1 hour 30 minutes Candidates answer on the Question Booklet. Additional materials: Multiple Choice Answer Sheet READ THESE INSTRUCTIONS FIRST Write your name, class and register number on all the work you hand in. Write in dark blue or black pen in the spaces provided on the Question Paper. You may use a soft pencil for any diagrams, graphs, tables or rough working. Do not use staples, paper clips, glue or correction fluid. Section A There are twenty questions in this Section. 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 in soft pencil on the separate Answer Sheet provided. Each correct answer will score one mark. A mark will not be deducted for a wrong answer. Section B and Section C Answer all questions. Write your answers in the spaces provided on the question paper. If working is needed for any question, it must be shown with the answer. pYou are allowed to use a calculator. A copy of the Periodic Table is provided on page 26. The number of marks is given in brackets [ ] at the end of each question or part question. The total number of marks for this paper is 70. 70www.KiasuExamPaper.com 195

2 Section A1There are four investigation topics for a study on exercise habits.1 investigating the average duration of an exercise session2 investigating the frequency of exercise per week among young adults3 investigating the mental health benefits of exercise4 investigating the reasons that motivate people to exerciseWhich pair of investigations will require the collection of qualitative data?A1 and 2 B1 and 4 C2 and 3 D3 and 4 2A compound, named benzene, is a liquid at room temperature. It catches fire easily and its vapour is toxic. 1 2 3 4 Which hazard symbols will be found on a bottle of benzene?A1 and 2B1 and 3C2 and 3D3 and 4 www.KiasuExamPaper.com 196

3 [Turn over 3Which position of the eye will result in an accurate reading of the volume of liquid? A B C D4A student measures the mass of an object on an electronic balance.The electronic balance shows a reading of 0.50 g before she put the object on it.What is the type of error shown?Aconsistent parallax errorBconsistent zero errorCunpredictable parallax errorDunpredictable zero error www.KiasuExamPaper.com 197

4 5A set of digital calipers is used to measure the external diameter of the boiling tube.The glass boiling tube has an external diameter of 26.2 mm and an internal diameter of 24.0 mm. What is the thickness (t) of the glass wall of the boiling tube?A1.1 mmB2.2 mmC24.0 mmD26.2 mm 24.0mm t 26.2mm boiling tube www.KiasuExamPaper.com 198

5 [Turn over 6A load is placed on two rods, P and Q, made from different materials.Rod P sags a little when the load is placed on it while rod Q breaks into two pieces. Which conclusion is correct about the two rods?ARod P is denser than rod Q.BRod P is harder than rod Q.CRod P is stronger than rod Q.DRod Q is more flexible than rod P.7Three liquids, P, Q and R, have different densities and do not mix. The liquids are placed in a measuring cylinder and allowed to settle.A small block is then dropped into the measuring cylinder and comes to rest as shown. Which statement about the density of the block is correct?AThe block has the same density as Q.BThe density of the block is greater than the density of P.CThe density of the block is greater than the density of R.DThe density of the block is less than the density of Q. rod Q load rod P load block R Q Pwww.KiasuExamPaper.com 199

6 8A student conducted a series of experiments on different solids and made observations. Which solid, P, Q, R or S is a compound? solid PSolid P is made up of two colours: white and green. When water was added, only the white particles dissolved. The green particles remained at the bottom of the beaker. solid QSolid Q has a silvery and shiny appearance. When it is heated at a high temperature, it melts into a silver liquid at a fixed temperature. solid R Green solid R has a fixed compositionby mass. When electricity is passed through R, a colourless gas and a black solid is produced.solid SSolid S conducts electricity well and can be found in the Periodic Table. When S is heated strongly in the air, it reacts with oxygen to form only one substance.A PB Q C RD S9 An equal amount of sugar is added to equal volume of identical solvents under different conditions. In which setup would sugar dissolve the fastest? temperature of solvent / °Csize of sugar A 20 large piece B20 small piecesC 80 large piece D 80 small pieces 10 Which two separation techniques are used to purify sewage water to obtain NEWater? A distillation and chromatography B distillation and filtration C microfiltration and evaporationD microfiltration and reverse osmosis www.KiasuExamPaper.com 200

7 [Turn over 11A student wants to separate a mixture of iron powder, salt, water and sand. 1 chromatography 2 filtration 3 magnetic separation 4 evaporation What is the correct sequence of steps the student can take to obtain the iron powder, salt and sand separately? A1 2 3B 2 1 4 C 3 2 4 D 3 4 2 12 A mirror shop had two requests for mirrors to be made: Customer 1: I need a personal mirror that allows me to examine the details of my teeth while in the toilet. Customer 2: I need a mirror that allows me to see around blind corners at a road junction. What type of mirror would be most suitable for each customer? customer 1 customer 2 A concave concave B concave convex C convex concave D convex convex www.KiasuExamPaper.com 201

8 13The diagram shows the positions of a girl and a pot of plant in front of a plane mirror.What is the distance from the girl to the image of the pot of plant?A1.5 mB6.0 mC7.5 mD9.0 m14The diagram shows a microscope.Which statement correctly describes the function of part X.Aallows adjustments to the position of the stage to obtain a shaper focusBcontrols the amount of light entering the lensCmoves the stage up and down to obtain a clear imageDprovides light to the eye 4.5 m 3.0 m X www.KiasuExamPaper.com 202

9 [Turn over 15Haemophilia is a genetic disorder that is passed down from one generation to the next. The blood of a person suffering from haemophilia does not clot normally.How is this disorder passed down from the parent to the child?ADNA in the cell membrane is passed on from parent to child.BDNA in the cytoplasm is passed on from parent to child.CDNA in the nucleus is passed on from parent to child.DDNA in the vacuole is passed on from parent to child.16The heart is made up of muscles, nerves and other structures.The function of the heart is to pump blood through the circulatory system.Which row best describes the heart, muscles and nerves?heart muscles nervesAorgan cell tissueBorgan tissue tissueCtissue cell cellDtissue tissue cell17Pollen grains in a transparent box of water are observed using a microscope. Onepollen grain is seen to move around as shown.What does this experiment demonstrate about water molecules?AThey are in constant and random motion.BThey can be seen though a microscope.CThey move because of collision with pollen grains.DThey move more quickly when they are heated. www.KiasuExamPaper.com 203

10 18Which row shows the relationship between the energy of the particles and the space between the particles? energy of particles space between particles A decreases increases Bdecreases remains the sameC increases increases D increases remains the same 19 Which row correctly shows the electrical charges of electron, proton and neutron? electron neutron proton A negative neutral positive Bnegative positive positiveC neutral positive negative D positive neutral negative 20 How many ele