Mount St. Helen

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