Across
- 3. A volcanic flow that is fast and deadly
- 4. The same as lava, but underground
- 8. The point on the Earth's surface that is hit hardest by an earthquake
Down
- 1. An explosive mountain
- 2. A violent shaking of the Earth's crust
- 5. A scale used to measure earthquake strength
- 6. The thickest layer of the Earth
- 7. A short way of saying 'poor countries'