Across
- 4. Fuels Energy-rich substances formed from the remains of ancient life.
- 6. The layer of gases surrounding Earth.
- 8. Rock Rock formed from the alteration of existing rock.
- 10. Large landmasses on Earth's surface.
- 11. Sudden shaking or trembling of the Earth's surface.
- 13. Natural substances with a unique chemical composition.
- 14. Preserved remains of ancient organisms.
- 15. Rock Rock formed from cooled and solidified magma or lava.
Down
- 1. Openings in the Earth's crust that release molten rock.
- 2. Tectonics The theory explaining the movement of Earth's lithosphere.
- 3. Large masses of ice that slowly move over land.
- 5. Rock Rock formed from accumulated layers of sediment.
- 7. Solid, naturally occurring aggregates of minerals.
- 9. Vast bodies of saltwater covering most of Earth's surface.
- 12. The process of wearing away Earth's surface by natural forces.