week 22 Earthquakes and Volcanoes Plate Tectonics 25-26

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Across
  1. 2. the area on Earth's surface directly over the point where the earthquake started (week 21)
  2. 5. the paper or digital recording of the ground shaking at the specific location of the instrument.
  3. 9. Slower earthquake waves that move in an up-down motion 90 degrees to the travel of the wave.
  4. 11. The fastest earthquake waves that move in a push-pull motion.
  5. 12. Volcanoes not near plate boundaries where a current of hot magma rises from far below.
  6. 13. The slowest earthquake waves that move in a rolling motion
  7. 14. Periodic back and forth motion of Earth materials due to an earthquake.
Down
  1. 1. A measure of how powerful the vibrations were during an earthquake
  2. 3. Tiny particles of pulverized volcanic rock and glass.
  3. 4. the process in which the hotter, less dense parts of a gas or liquid rise to the top and the cooler, denser parts sink (week 21)
  4. 6. an instrument that detects ground noises and shaking such as caused by quakes, volcanic eruptions, and explosions.
  5. 7. the size of an earthquake, measured on a scale of 1 to 10 (week 21)
  6. 8. consisting of fragments of rock and ash that are erupted by a volcano (pyro = fire, clastic = piece of rock)(week 21)
  7. 10. A liquid's resistance to flow. High viscosity is thick, while low viscosity is runny.