Plate Tectonics

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Across
  1. 2. the California earthquake of April 18, 1906 ranks as one of the most significant earthquakes of all time
  2. 4. the result of a sudden release of stored energy in the Earth's crust that creates seismic waves
  3. 6. giant waves caused by earthquakes or volcanic eruptions under the sea
  4. 7. a mountain that opens downward to a pool of molten rock below the surface of the earth. When pressure builds up, eruptions occur
Down
  1. 1. one of Indonesia's 100-plus active volcanoes. Its eruptions in 1815 rocked the world with after-effects.it caused disease and harmed the growth of crops in the surrounding regions, and caused climate changes as far away as North America. it killed over 90,000 people.
  2. 3. a massive, irregularly shaped slab of solid rock, generally composed of both continental and oceanic lithosphere
  3. 5. German meteorologist and geophysicist who formulated the first complete statement of the continental drift theory