Volcanoes

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Across
  1. 5. depression at the summit of the volcano
  2. 7. substances resistance to flow
  3. 10. cones stratovolcanoes- most beautiful and dangerous
  4. 11. broad, gently sloping volcanoes
  5. 15. air-filled lava
  6. 16. rising magma can form continental volcanic arcs
  7. 17. volcanic activity that occurs with a plate away from plate boundaries
  8. 22. formed by lava and pyroclastic material
  9. 23. small volcanoes made up of pyroclastic material that has been ejected from a single vent
Down
  1. 1. determined by silica content in lava and effects the viscosity
  2. 2. opening in the surface of earth through which molten rock and gases are released
  3. 3. particles produced in eruptions
  4. 4. basaltic lava flow that resembles braids
  5. 6. cinders that are small bead to walnut sized particles
  6. 8. dust
  7. 9. lava flow that makes rough formations
  8. 12. carries gas-rich magma to surface
  9. 13. the percentage of magma by weight that is gas
  10. 14. gases evaporated vapors
  11. 18. the measure of how much energy or heat something is made of
  12. 19. where rising magma can form volcanic island arcs in ocean
  13. 20. larger than 64 millimeters
  14. 21. particles that are ejected as glowing lava