Across
- 4. Solid ground, especially in contrast to the sea or air (land)
- 6. To ascertain the size, amount, or degree of something (measure)
- 7. No longer in existence; having died out (extinct)
- 9. Sudden shaking of the ground (earthquake)
- 10. A unit of land area (acres)
- 11. Sections of the Earth's crust (plates)
- 12. To be consumed by fire (burn)
Down
- 1. Presently inactive but with potential to become active again (dormant)
- 2. Elevated terrain, often mountainous (highlands)
- 3. Uncontrolled fire in wild vegetation (wildfire)
- 5. To propagate widely (spread)
- 7. The act or process of bursting forth violently (eruption)
- 8. A disturbance on the surface of a body of water (wave)