ESC 1000 Earth Science    Name:____________

 

Chapter 21: Origins of Modern Astronomy

Part E End of Chapter Review Questions                                       12 Points

 

Your instructor will either choose three questions of the following or they will be circled on the paper. If he chose only one, then you may chose two. If he circles two, then you may chose one. You write a short answer for 4-4-4 points each:

 

  1. (#13) Explain the difference between the mean solar day and the sidereal day?

 

  1. (#14) What is the approximate length of the cycle of the phases of the Moon?

 

  1. (#16) What phase of the Moon occurs approximately one week after the new Moon? Two weeks? Three Weeks?

 

  1. (#18) What phenomenon results from the fact that the Monn’s period of rotation and revolution are the same?

 

  1. (#20) Describe the locations of the Sun, Moon, and Earth during a solar eclipse and during a lunar eclipse.

 

  1. (#21) How many eclipses normally occur each year?

 

  1. (#22) Solare eclipses are slightly more common than lunar eclipses. Why then, is it more likely that your region of the country will experience a lunar eclipse?

 

  1. (#23) How long can a total eclipse of the Moon last? How about a total eclipse of the Sun?