Earth Quiz

2. Early astronomers thought that the Earth was _______.
4. Early astronomers thought that ________ is at the center of the Universe and that all other objects in space revolved around Earth.
5. The appearance of the Sun traveling across the sky during the day is the result of the Earth’s _____________.
6. After a long and slow process, astronomers began to believe (and then see) the Earth is a ________.
7. Earth has a 23.5 degree axial tilt that causes Earth’s __________.
8. It takes 1 day for Earth to make one ___________ rotation on its axis.
11. Astronomers believe that Earth began to form about 4.7 __________ years ago.
12. Earth is 24,901 miles ___________.

1. Earth spins (or __________) on its axis.
3. Day and night occur on Earth as the Earth rotates along its _______, causing half of the Earth to be facing the Sun (day) and half of the Earth to be facing away from the Sun (night).
5. It takes 1 year for Earth to make one complete ____________ around the Sun.
9. All of the planets except Earth are named for Greek or Roman gods. Earth comes from the English word ertha and the German word erda. Both words means “the ___________.”
10. _________ is the 3rd planet from the Sun.
13. 1 ______ on Earth (the time it takes to make one complete rotation) is not 24 hours, but rather 23 hours and 56 minutes and 4 seconds.