Across
- 1. cloud of extremely hot ash and rock fragments
- 5. a result of plate tectonics
- 7. scientist who studies volcanoes
- 8. large volcanic crater
Down
- 2. movement and collision of Earth's plates
- 3. layer of Earth below the crust
- 4. mountains or hills which lava erupts
- 6. crack in the Earth's surface that can erupt lava