Polaris Latitude Worksheets - DOC by qxv49469

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									PHYSICAL EARTH                                               Name_____________________________________

                                                             Period________________


                                      DETERMINING YOUR LATITUDE


To tell someone the location of a star, you must give him a compass direction and the altitude (angle above the
horizon) of your line of sight. The next procedures may help you to understand that the altitude of Polaris has a
special significance.


             Observer                                 Latitude                        Altitude of Polaris
                1.
                2.
                3.
                4.




Procedures

A.     The diagram shows four observers on the surface of the globe. For each observer there is a horizontal
       and a line of sight to Polaris. Use your protractor to measure the angle from the center of the earth that
       describes the latitude of each observer. Enter the latitude of each observer in the first column above.

B.     Use your protractor to measure the angle between the horizontal and the line of sight to Polaris for each
       of the four observers. Enter these angles in the second column above.




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Interpretations

1.     How do the angles in the second column compare with the angles in the first column?

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2.     An observer located at 42°n. lat. will see Polaris at ___________________ degrees above the horizon
       line.

3.     Will an observer located at 5°s. lat. see Polaris? ____________________ why or why not?

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4.     Why are the arrows pointing toward Polaris, parallel? ________________________________________

       ____________________________________________________________________________________

       ____________________________________________________________________________________

       ____________________________________________________________________________________




40d372be-f59d-4fbe-b2ee-5f47f4d8b28d.doc   07/05/11

								
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