| Term | Definition |
|---|---|
| What is the moon like ? | dry, airless, has an irregular surface, small compared to earth, has large variations in its surface temperature |
| Maria | dark, flat areas that are hardened rock formed from huge lava flows that occurred 3-4 billion yrs ago |
| Craters | large pits that can be hundreds of kilometers across, caused by meteoroids |
| Highlands | mountians that are light-colored on the moon's surface, cover most of the moon's surface |
| Moons Diameter | 3,476 kilometers across, 1/4 of Earth's diameter |
| Moons Mass | 1/8 of Earth's mass |
| Moons Gravity | 1/6 of Earth's gravity |
| Moons Temperature | ranges from 130c to -170c , they very because the moon has no atmosphere |
| Collision-ring Theory | the theory of how the noon was formed |
| Average Density | the moon and earth are very similar |
