spinning on an axis
One full trip by Earth around the sun
the shapes created by the changing amounts of the visible lighted areas of the moon
The first day of fall in the Northern Hemisphere.
The hours of light and darkness are equal everywhere on Earth.
This occurs when one object passes into the shadow of another object
Dec. 21-22. The North Pole is at it's greatest tilt away from the sun. Shortest day of the year!
March 20-21. Spring begins in the Northern Hemisphere. The hours of light and darkness are equal everywhere on Earth.
June 21-22. The North Pole is tilted directly toward the sun. First day of summer and longest day of the year.
an imaginary line around which a body rotates
an increasing area of the moon is lighted.
a decreasing area of the moon is lighted.
the path an object follows in space