2023 SGSS 1E EYE LSS - QP

St. Gabriel’s Secondary School 2023 End-of-Year Examination Additional material: Multiple Choice Answer Sheet ▪ Section B: Answer one question. ▪ You are advised to spend no longer than 50 minutes on Section A. INFORMATION FOR CANDIDATES The number of marks of each part-question is shown in brackets. This question paper consists of 24 printed pages including this cover page. Subject : Lower Secondary Science Level/Stream : Sec 1 Express / Sec 1 Normal Academic (SBB) Duration : 1 hour 45 minutes Date : 6 October 2023 Setter : Ms Pang Seok Mun READ THESE INSTRUCTIONS FIRST Write your name, register number and class in the spaces above. You may use a soft pencil for any rough working. Do not use staples, paper clips, highlighters, glue or correction fluid. Section A Answer ALL the questions using the Multiple Choice Answer Sheet provided. Four suggested answers are given f or each question. Cho ose the best answer and use a soft pencil to shade the corresponding circle on the answer sheet clearly. Each question carries one mark. The total marks for this section is 25 marks. Submit your Multiple Choice Answer Sheet separately. Section B Answer ALL the questions in the spaces provided. The total marks for this section is 35 marks. Section C Answer ALL the questions in the spaces provided. The total marks for this section is 20 marks. The number of marks is given in [ ] at the end of each question or part question. A copy of the Periodic Table is provided on page 24. Name: …………………………………………………… ( ) Class: Sec ………… Section B For Examiner’s Use Section A Section C Total 80

2 SGSS/LSS/1E1NASBB/EYE/2023 Section A: Multiple Choice Questions [25 marks] 1 The diagram shows a hazard symbol on a chemical bottle in the science laboratory. What would be the harmful effect if a person is not careful when handling the chemical? A The chemical may cause an explosion when heated. B The chemical may cause damage to body parts when in contact. C The chemical may cause damage to one’s health when breathed in. D The chemical may cause death when it is absorbed through the skin. 2 The air-hole of a Bunsen burner can be opened or closed to obtain two types of flame. Which row shows the correct colours of region X and Y? X Y A blue orange B blue blue C orange blue D orange orange dark blue X Y dark blue flame of Bunsen burner with air-hole opened flame of Bunsen burner with air-hole closed

3 SGSS/LSS/1E1NASBB/EYE/2023 3 A student was carrying out an investigation and made the following claim: “When the current increases, the filament in the bulb turns from red to orange.” Which step of the scientific method is the student carrying out? A asking a research question B constructing a hypothesi