In honor of Earth day. How much do you know about the only planet you've ever inhabited?
Quiz created by: Bill Graves
1. Order from the sun:
2. Size relative to other planets in Solar System:
3. Latin name:
4. Rough tilt of the axis of rotation in degrees:
5. Rough length of time it takes to orbit the sun in days:
6. As of 2010, population to the closest billion.
7. About what percent of the earth is covered with water?
8. Surface location farthest from the center of the earth:
9. The earth's core is made primarily of which material?
10. Furthest humans have been from the earth, in miles: