Across
- 2. assumption based on an observation
- 4. rock of fire
- 5. moving plates on the earth's surface
- 8. made from other pieces
- 10. molten rock underground
- 11. molten rock above ground
- 13. seeing and writing down facts
- 14. middle life
- 15. when all members of a species have died
Down
- 1. fault line across California
- 3. the outside barrier of a cell
- 6. recent life
- 7. high temperature
- 9. rock that has undertaken a transformation
- 12. ancient life