Across
- 3. molten rock under earth's surface
- 5. a lump of metal or rock from space that crashes into earth
- 6. force applied evenly over area
Down
- 1. one of the hardest substances on earth and rarest gems
- 2. large object/rock that orbits star in space
- 4. smallest planet in solar system
- 7. star at center of our solar system