Volcano Crossword

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Across
  1. 3. path along the Pacific Ocean characterized by active volcanoes and frequent earthquakes.
  2. 4. an oceanic tectonic plate that lies beneath the Pacific Ocean.
  3. 8. A plate boundary is a three-dimensional surface or zone across which there is a significant change in the velocity (speed or direction) of motion of one lithospheric plate relative to the adjacent lithospheric plate.
  4. 12. the outermost layer of Earth's lithosphere that is found under the oceans and formed at spreading centres on oceanic ridges, which occur at divergent plate boundaries.
  5. 13. a large volcano that has erupted on the seafloor and has emerged above sea level, occurring in ocean basins or on ocean ridges.
  6. 14. formed from the cooling and solidification of molten (melted) rock
  7. 16. any sudden shaking of the ground caused by the passage of seismic waves through Earth's rocks.
  8. 18. coming closer together, especially in characteristics or ideas.
  9. 19. hot molten or semifluid rock erupted from a volcano or fissure, or solid rock resulting from cooling of this.
  10. 20. the solid residue left when combustible material is thoroughly burned or is oxidized by chemical means.
Down
  1. 1. the solid, outer part of the Earth
  2. 2. the outermost layer of Earth's lithosphere that makes up the planet's continents and continental shelves
  3. 5. A pyroclastic flow is a fast-moving current of hot gas and volcanic matter
  4. 6. a portion of the Earth's mantle that flows like molten plastic despite being solid
  5. 7. a special class of mountains
  6. 9. the sideways and downward movement of the edge of a plate of the earth's crust into the mantle beneath another plate.
  7. 10. mountain or hill, typically conical, having a crater or vent through which lava, rock fragments, hot vapor, and gas are being or have been erupted from the earth's crust.
  8. 11. a small area or region with a relatively hot temperature in comparison to its surroundings.
  9. 15. hot fluid or semifluid material below or within the earth's crust from which lava and other igneous rock is formed on cooling.
  10. 17. mixtures of water, volcanic ash, tephra, rock fragments, and chunks of ice that can flow like wet concrete.