Tectonics

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Across
  1. 5. Area where two plates are slipping sideways past each other
  2. 6. Scientist who studies the processes that shape Earth's crust
  3. 7. Plate boundary where plates are moving sideways past each other
  4. 9. Thin semi-rigid outer surface of the planet
Down
  1. 1. Type of current caused by heated liquids or gases rising
  2. 2. Seismic events which occur around the margins of plates
  3. 3. Large mass of less dense crust which is above sea level
  4. 4. Area which includes both continental and oceanic crust
  5. 8. Type of crust which is produced at mid-ocean ridges