Volcano Crossword

6. The layer under the mantle that's convection current causes plate tectonics
7. An area where superhot mantle leaks through the crust and forms volcanoes
9. A word used to describe inactive volcanoes
10. A word used to describe a volcano that could erupt at any time
11. Massive pieces of land that move around over a convection current; whose boundaries form landforms
12. The loop of volcanoes and earthquakes that surrounds the pacific plate

1. The index scientists use to explain the danger level of a volcano
2. The thickness of a liquid
3. When a volcano explodes under intense pressure
4. After an eruption there can be earthquakes as a result of this
5. This often spills out a volcano, and can cover houses and streets
8. A deadly Mixture of hot ash and toxic gases that flows down a mountain during an eruption