Volcanoes

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Across
  1. 5. in dissolved gases
  2. 7. substance's resistance to flow.
  3. 8. gases leave easily in this kind of magma.
  4. 12. lava hardened in a vent.
  5. 15. air-filled lava.
  6. 18. affects the viscosity of an object.
  7. 19. rough jagged blocks with sharp projections.
  8. 20. lava that is fluid
  9. 21. type of volcano that is broad
  10. 22. also affects an objects viscosity.
  11. 23. the _________ the magma means less viscosity.
Down
  1. 1. depressions from the collapse of the magma chamber.
  2. 2. the more silica the________ viscosity.
  3. 3. two objects sliding together causes this.
  4. 4. the less silica means________ viscosity.
  5. 6. found in dissolved gases
  6. 9. formed from many small eruptions.
  7. 10. 1-6% of magma is______.
  8. 11. small volcanoes built from pyroelastic material.
  9. 13. large and dangerous volcanoes
  10. 14. opening in the surface of earth that gases are released.
  11. 16. gases do this near the surface.
  12. 17. volcanic activity that occurs on a plate away from a plate boundary