Tectonic Plates

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Across
  1. 1. The thin layer of the earth's surface
  2. 4. The centre of the earth
  3. 7. boundaries occur where two plates slide apart from each other
  4. 10. Scale This measures the strength of the earthquake
  5. 12. Method of farming found in Alpine areas
  6. 17. Volcano Steep sided cone with layers of ash and lava
  7. 18. Holmes The theory was launched by
  8. 19. Margin Where two plates move apart
Down
  1. 2. Volcano A gentle sided volcano with a wide base made up of basic lava
  2. 3. Mountains Mountains formed by the earth's movements
  3. 5. boundaries occur where two lithospheric plates slide
  4. 6. Plate A huge section of the earth's crust
  5. 8. A shaking of the earth's crust
  6. 9. Huge tidal waves that are caused by submarine earthquakes
  7. 11. The mouth of the volcano
  8. 13. Zone Where a plate sinks and slides under another plate
  9. 14. The molten rock that surrounds the earth's core
  10. 15. The point on the earth's surface directly above the epicenter
  11. 16. Lava Thin , runny lava which can flow long distances
  12. 20. The name given to liquid magma when it reaches the surface of the earth