Volcanoes

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Across
  1. 2. the recording of the ground shaking at the specific location of the seismograph
  2. 4. the place inside Earth's crust where an earthquake originates
  3. 6. A “ripple” wave produced by an earthquake. The “S” is from the Italian “Segundo,” indicating that S-waves arrived at seismic stations after the P-waves.
  4. 7. tectonics a theory in geology: the lithosphere of the earth is divided into a small number of plates which float on and travel independently over the mantle and much of the earth's seismic activity occurs at the boundaries of these plates
  5. 10. the branch of science concerned with earthquakes and related phenomena.
  6. 11. chamber molten rock that issues from a volcano or from a fissure in the surface of a planet (such as earth) or moon
  7. 12. a fissure in the earth’s crust through which gases erupt
  8. 13. the point on the Earth's surface directly above the place that an earthquake occured
  9. 15. circular depression in the ground. It has steep sides and contains a volcanic vent.
Down
  1. 1. A compression wave produced by an earthquake. The “P” is from the Italian “primero,” indicating that the P-waves were the first to arrive at seismic stations.
  2. 3. molten rock in the earth’s crust
  3. 5. a device that records and measures seismic waves (vibrations in the Earth), like those from earthquakes.
  4. 6. wave A form of sound wave that travels away from the source of an earthquake. There are several types of seismic waves, but S-waves and P-waves are the most commonly measured and recognized.
  5. 8. molten rock that issues from a volcano or from a fissure in the surface of a planet (such as earth) or moon
  6. 9. eruption when a volcano has a sudden occurrence of a violent discharge in which lava, tephra, or gases are released.
  7. 12. A vent is an opening in the earth's surface through which volcanic materials (like lava, gases, and pyroclastic debris) erupt.
  8. 14. 1. The sudden motion or slip along a fault. 2. The ground shaking that results from the release of seismic energy either by (1) or by other means, such as the movement of magma beneath the surface of the Earth.