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SECONDARY SCIENCE  \nSecondary 1 Express 07 May 2018  \n1 hour 30 minutes  \nAdditional Materials: Multiple Choice Answer Sheet  \nREAD THESE INSTRUCTIONS FIRST  \nWrite in soft pencil.  \nDo not use staples, paper clips, glue or correction fluid.  \nWrite your name and index number on the Answer Sheet in the spaces provided unless this has been done for you.  \nInformation for Candidates  \nSection A  \nThere are twenty questions in this section. Answer all questions. For each question there are four possible answers A , B , C and D.  \nChoose the one you consider correct and record your choice in soft pencil on the separate Answer Sheet.  \nSection B  \nAnswer all questions.  \nWrite your answers in the spaces provided on the Question Paper. Candidates are reminded that all quantitative answers should include appropriate units.  \nThe use of an approved scientific calculator is expected, where appropriate.  \nCandidates are advised to show all their working in a clear and orderly manner, as more marks are awarded for sound use of concepts than for correct answers.  \nAt the end of the examination, fasten all your work securely together. The number of marks is given in brackets [ ] at the end of each question or part question.  \n\n| For Examiner’s Use |  |  |\n| --- | --- | --- |\n| Section A |  | / 20 |\n| 21 |  | / 5 |\n| 22 |  | / 4 |\n| 23 |  | / 4 |\n| 24 |  | / 6 |\n| 25 |  | / 8 |\n| 26 |  | / 4 |\n| 27 |  | / 5 |\n| 28 |  | / 4 |\n| Section B |  | / 40 |\n| Total |  | / 60 |\n| % / Grade |  | / |\n\nSetter(s): Ms Wong W L Parent’s / Guardian’s Signature:    \nThis document consists of 16 printed pages.  \nDo not turn over the page until you are told to do so.  \n2  \nSection A  \nAnswer all the questions in this section.  \n1 Which of the steps could be carried out first before formulating a hypothesis?  \nA decide on the variables B gather relevant information  \nC share of results with others D design an experiment  \n2 Laboratory tests showed that a patient is suffering from radioactive poisoning. Which hazard symbol did the patient most likely ignore before the incident?  \n\n| | | | |\n| --- | --- | --- | --- |\n| A | B | C | D |\n\n3 In mining fields, drills are used to remove rocks to search for the valuable metal ores below. The intense drilling generates high amount of frictional heat.  \nWhich physical properties should be considered when we choose a material to make the drills?  \nA strength, melting point, transparency  \nB strength, electrical conductivity, thermal conductivity  \nC hardness, strength, melting point  \nD hardness, electrical conductivity, boiling point  \n4 Tommy used a metre scale to measure the length of a wooden block in the diagram below.  \nwooden block  \nWhat is the length of the block of wood?  \nA 13.5 m  \nB 14.0 m  \nC 14.5 m  \nD 15.0 m  \nBVSS  \n3  \n5 During an experiment, Janany placed a cube of nata de coco into the measuring cylinder below.  \nWhat is the final water level in the measuring cylinder if the nata de coco sinks in water?  \nA 42 cm3 B 46 cm3  \nC 48 cm3 D 52 cm3  \n6 Three balls of the same size but different densities are immersed in four beakers carrying different liquids.  \nThe densities of the balls are 0.8 g/cm3 , 1 . 1 g/cm3 , 1 .4 g/cm3.  \nWhich beaker holds a liquid of density 1.2 g/cm3?  \nA B C D  \n7 Which of the following gives the correct SI units for length and time respectively?  \n\n|  | length | time |\n| --- | --- | --- |\n| A | m | h |\n| B | m2 | min |\n| C | m3 | h |\n| D | m | s |\n\n8 Which of the following is correct?  \n\n|  | name of element | chemical symbol |\n| --- | --- | --- |\n| A | nitrogen | Ni |\n| B | cobalt | Co |\n| C | carbon | Ca |\n| D | beryllium | B |\n\nBVSS [Turn over  \n4  \n9 Which of the following diagrams represents a mixture?  \nA  \nC  \nB  \nD  \n10 Which of the following shows the correct classification of substances?  \n\n|  | element | compound | mixture |\n| --- | --- | --- | --- |\n| A | mineral water |","cbCaiv6eYgGKUy5O","https://ap.wps.com/l/cbCaiv6eYgGKUy5O","pdf",12353725,171,"English","# Section A\n## Questions 1-10\n## Questions 11-16\n# Section B\n## Questions (qualitative and quantitative with working and units)","[{\"question\":\"How should candidates record answers in Section A?\",\"answer\":\"Candidates answer all questions in Section A with four possible options A, B, C and D, and record the chosen option in soft pencil on the separate Answer Sheet.\"},{\"question\":\"What guidance is given for quantitative answers in Section B?\",\"answer\":\"All quantitative answers should include appropriate units, and candidates are advised to show all working clearly and orderly since marks are awarded for sound use of concepts.\"},{\"question\":\"How can a safe source of drinking water be obtained according to the paper?\",\"answer\":\"The paper states that safe water for consumption can be obtained by distillation (with the relevant options including chromatography, distillation, and evaporation).\"}]","BEDOK VIEW SECONDARY SCHOOL MID-YEAR EXAMINATION 2018 - LOWER SECONDARY SCIENCE | PDF",1790416734,431]