Sec 1 2024 Woodlands Secondary School Science EOY

1 G3SUBJECT LEVELG3SUBJECT LEVELName: ____________________ ( ) Form Class/Subject Group: __________/__WOODLANDS SECONDARY SCHOOLEND-OF-YEAR EXAMINATION 2024Subject Level: G3 Marks: 100Subject: Lower Secondary Science Day: FridayPaper: - Date: 4 October 2024 Duration: 2 hours Time: 0800 – 1000 ____________________________________________________________________READ THESE INSTRUCTIONS FIRSTWrite your index number, name and class on all the work that you hand in.Do not use staples, paper clips, glue or correction fluid. Section AWrite in soft pencil. There are thirtyquestions in this section.Answer allquestions. 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 Optical Answer Sheet. Each correct answer will score one mark.Section B and CAnswer allquestions. Write in dark blue or black pen. You may use an HB pencil for any diagrams or graphs.Write your answers in the spaces provided on the question paper.You may lose marks if you do not show your working or if you do not use appropriate units.A copy of the Periodic Table is printed on page 22. The use of an approved scientific calculator is expected, where appropriate. The number of marks is given in brackets [ ] at the end of each question or part question.For Examiner’s UseSection A Section B Section C Total/30 /40 /30 /100DO NOT TURN THE PAGE UNTIL YOU ARE TOLD TO DO SO.This document consists of 22 printed pages. Secondary 1 www.KiasuExamPaper.com 229

2 G3SUBJECT LEVEL G3SUBJECT LEVELSection A (30 marks)Answer allquestions. Shade your answers on the Optical Answer Sheet provided.1Ethanol causes fire readily when reacts with oxygen in the air.Sodium hydroxide attacks tissues.Potassium nitrate decomposes to release oxygen which supports burning.Which of the following lists the correct examples of chemicals with the given hazard symbols? Aethanol sodium hydroxide potassium nitrateBsodium hydroxide ethanol potassium nitrateCsodium hydroxide potassium nitrate ethanolDpotassium nitrate ethanol sodium hydroxide2A scientist wanted to produce membrane of a certain thickness. He repeated the experiment 10 times, always producing membranes of the same thickness but not the ideal thickness that he wanted.Which of the following best describes his results?accuracy precisionAhigh highBhigh lowClow highDlow low3Which of the following instruments is most appropriate to determine each measurement?volume of water diameter of thin wire mass of a ballAmeasuring cylinder digital calipers electronic balanceBmeasuring cylinder ruler weighing machineCtest tube digital calipers electronic balanceDtest tube ruler weighing machine www.KiasuExamPaper.com 230

3 G3SUBJECT LEVEL G3SUBJECT LEVEL 4A student was instructed to cut threads that are 15.0 cm in