Earth's Atmosphere and Its Seasons
In the Lab: Sun Angle and the Seasons Worksheet

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Name:_____________________________________________________



  1. An important factor influencing the amount of solar energy received at a particular place and time is

    __________________________________________________.


  2. On frame 203, measure the widths of sunbeams A and B. Are they the same?    __________________


  3. On frame 205, what is the angle between the surface and the beam of light shining on area D?

       ________________________________________


  4. On frames 206 and 207, what are the measurements of the length of line in Area C  ___________________________

    and Area D  ___________________________  ?


  5. On frame 211, what fraction of incoming solar radiation is concentrated between 30 and 60 degrees N latitude?

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  6. What is the angle between the surface and the Sun's rays for angle B on frame 213?

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  7. The lower the Sun angle, the more concentrated the Sun's rays.      True      or      False      (circle one)?


  8. Why do the Sun's vertical rays shift between hemispheres?

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  9. What latitude is receiving the vertical or overhead noon Sun on December 21 or 22?

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  10. How do you calculate noon Sun angle?

    Step 1:    ___________________________________________________________________________

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    Step 2:    ___________________________________________________________________________

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  11. Calculate the noon Sun angle for 24° S latitude on June 21 or 22 (see frame 223).

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  12. What is the noon Sun angle for 62° N latitude during an equinox (see frame 224)?

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  13. What is the main use of an analemma?

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  14. What are the three steps in calculating the noon Sun for a particular place and date?

    1. ___________________________________________________________________________________________

    2. ___________________________________________________________________________________________

    3. ___________________________________________________________________________________________


  15. Calculate the noon Sun angle at 36° N latitude on January 25.

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  16. What is the noon Sun angle at 48 S latitude on September 10?

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