After the "Earth Rotation and Revolution" lecture and readings you should be able to answer and discuss the following questions.
List in order from the center outward all of the major celestial bodies in the Solar System.
Which planets are considered to be terrestrial planets? Why?
Which planets are considered to be gas giants? Why?
What is the physical basis for a year?
How long is a year?
What is the average distance from the Earth to the Sun?
What is the physical basis for a day?
How long is a day?
What is the Earth's current axial tilt?
How is axial tilt measured?
What is the plane of the ecliptic?
What is precession?
How long does it take the Earth's axis to make one complete precession?
How many years does it take the Earth's axis to precess one degree?
