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?
   
   _____________________________________________



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



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?
   
   ____________________________________________________________________________________________________
   
   
   ____________________________________________________________________________________________________



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



10. How do you calculate noon Sun angle?
    
    Step 1:    ___________________________________________________________________________
    
    ___________________________________________________________________________________
    
    Step 2:    ___________________________________________________________________________
    
    ___________________________________________________________________________________
    



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



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



13. What is the main use of an analemma?
    
    ____________________________________________________________________________________________________
    
    
    ____________________________________________________________________________________________________



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.
    
    ______________________________________________________________________________________



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