Across
- 3. volcano primarily made of erupted volcanic ash & rock fragments
- 4. Measures strength of an eruption
- 9. Hole in the earth's surface.
- 10. Underground channel created when surface lava hardens before lava underneath.
- 12. Leader of the knucklehead 7th graders
- 13. rough and jagged hardened lava
- 14. solid ejecta between 2-64 mm
- 15. mass of underground volcanic rock
- 16. Underground source of a volcanic eruption
Down
- 1. Channel in volcano that release eruption material
- 2. Molten rock pushes up overlying rock layers
- 5. volcano that probably won't erupt again
- 6. created from molten rock erupting from a hole in the crust
- 7. Created from a collapsed magma chamber
- 8. large ejecta harden before being thrown.
- 11. ejecta thrown high in the air and then solidifies