Science 30 January 1999 Grade 12 Diploma Examination

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Written ResponseCorrect-Order Question and SolutionWhen the following subjects are arranged inalphabetical order, the order is ____, ____,____, and ____ .1 physics2 biology3 science4 chemistry(Record all four digits of your answer in thenumerical-response section on the answersheet.)Answer: 2413Record 2413 on theanswer sheet2 4 1 3. .0 0 0 01 1 1 <strong>12</strong> 2 2 23 3 3 34 4 4 45 5 5 56 6 6 67 7 7 78 8 8 89 9 9 9• Write your answers in the examinationbooklet as neatly as possible.• For full marks, your answers mustaddress all aspects of the question.• Descriptions and/or explanations ofconcepts must be correct and includepertinent ideas, diagrams, calculations,and formulas.• Your answers must be presented in awell-organized manner using completesentences, correct units, and significantdigits where appropriate.• Relevant scientific, technological, and/orsocietal concepts and examples must beidentified and made explicit.iii
The principles of biology, chemistry, and physics are applied at a medical facility.Use the following information to answer the next question.Structural Formula of a DisinfectantH H HH ––––C – C – C – H–––HO–HH1. The substance shown above is used as a disinfectant. Its chemical name isA. propaneB. 2-ethaneC. methanolD. 2-propanol2. A patient is treated for an electrical shock. When he received the shock, his skin hada resistance of 500 and he was grounded with a 115 V line. The current that flowedthrough his body wasA. 0.2<strong>30</strong> AB. 4.35 AC. 385 AD. 615 A3. The component in blood that is responsible for clotting isA. white blood cellsB. red blood cellsC. helper T cellsD. platelets1
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Science 30 January 1999 Grade 12 Diploma Examination

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