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Skills for Study Level 2 Teacher's Book - Cambridge University Press

Skills for Study Level 2 Teacher's Book - Cambridge University Press

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Unit Task: Water research projectAssignment 1abcdeGroup discussionThis is an independent study task.Group in<strong>for</strong>mation sharingGroup-work taskClass in<strong>for</strong>mation sharingAssignment 2Note: In this stage of the unit task, students either carry out the lab experiment tomeasure the refractive index of water, or watch the complete experiment on video.a Students review the in<strong>for</strong>mation about keeping a logbook in Unit 1 Part C3.bcdStudents read through the lab instructions again.Students prepare pages in their logbook, including noting any background ormethod in<strong>for</strong>mation that they will need during the lab session.Students conduct the experiment (or watch Video SS2-2A1) and record results in alogbook.Note: The original experiment instructions include a page of graph paper on p.90<strong>for</strong> plotting results.AnswersThe actual published refractive index <strong>for</strong> water is 1.3330. The results recordedin the experiment on the video are there<strong>for</strong>e inaccurate. Students who are notactually conducting the experiment themselves would there<strong>for</strong>e need to includea discussion of possible reasons <strong>for</strong> this in their lab report. The results given inthe video are:Container Real depth (cm) Apparent depth(cm)Refractive index(n)1 13.7 11.5 1.1912 12.4 10 1.243 8.6 7.2 1.19efgAfter completing the experiment, students reflect on their logbook notes to addquestions or comments.Student discussionStudents design an experiment to measure the refractive index of water at differenttemperatures.Note: Ask students to turn to the checklist on p.241 and reread the tips relating toUnit 2 Parts A–B, be<strong>for</strong>e reading the tips to Unit 2 Part C. Encourage students to putthese tips into practice in their studies from now on. Tell them they will be asked toreport back on this in a future lesson.Unit 2 Part C ∙ Investigating 57

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