Across
- 5. Type of volcano that has steep sides
- 6. A harmful gas when Mt. Helen erupts
- 8. A fast moving-current of hot gas and volcanic matter
- 9. The state where Helen is located
Down
- 1. A large pool of liquid rock underneath earth's surface
- 2. A plate boundary where two plates collide
- 3. Particles when a volcano erupts
- 4. Mt. Helen has 64% of this element
- 5. When a plate gets recycled underneath
- 7. A destructive mudflow on the slopes of a volcano