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Group Activities

  1. Divide your group into two subgroups. After a few minutes of preparation, have a short debate about the advantages and disadvantages of mean solar time versus apparent solar time for civil timekeeping. Be sure to take account of practicality, convenience, and universality in your arguments.
  2. With a partner, mark the azimuth of the rising or setting sun (your choice), as shown in Figure 2.13, for at least a week. Find out how many days it takes for you to be absolutely sure that the azimuth of sunrise (or sunset) is changing.

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