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Review Questions: Earth-Sun Relations

Definitions

    1. What is insolation?
    2. What is meant by atmospheric pathlength?
    3. What is the tilt of the earth's axis?
    4. What is meant by parallelism?
    5. What is the circle of illumination?
    6. What is the sun angle measuring?
    7. What is the definition of declination?
    8. What is an equinox?
    9. What is a solstice?

Content

    1. What are the 3 main factors affecting the amount of insolation received at a particular place?
    2. Of these 3 factors, which 2 are the most important?
    3. How does the amount of insolation received at a particular place affect temperature?
    4. What are the motions of the earth, and how do these motions affect the amount of insolation received at a particular place?
    5. What is the declination of the sun on the March equinox, the June solstice, the September equinox and the December solstice?
    6. Does your location affect the declination? If not, what determines the declination?
    7. Why is the declination important with regards to the amount of insolation received at a particular place?
    8. What affect does sun angle have on the amount of insolation received at a particular place?
    9. At any given location (e.g. Stevens Point, WI or Christchurch, NZ), how does the sun angle change throughout the day and throughout the year? Why?
    10. On any given date (e.g. the March equinox), how does the sun angle change as latitude changes? Why?
    11. At noon, is the sun angle in Stevens Point higher in January or July? Why?
    12. What affect does day length (hours of sunlight) have on the amount of insolation received at a particular place?
    13. At any given location (e.g. Stevens Point, WI or Christchurch, NZ), how does day length (hours of sunlight) change throughout the year? Why?
    14. On any given date (e.g. the March equinox or the June solstice), how does the day length change as latitude changes? Why?
    15. What affect does atmospheric thickness have on the amount of insolation received at a particular place?
    16. At any given location (e.g. Stevens Point), at what times of the day does sunlight have the greatest pathlength to reach the surface?
    17. On any given date (e.g. the March equinox or the June solstice), at what latitude does sunlight have the greatest pathlength to reach the surface?
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Karen A. Lemke: klemke@uwsp.edu
Last revised January 19, 2007