Continental Drift and Plate Tectonics

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Across
  1. 4. Type of boundary that causes mountains to form generally.
  2. 6. Occur when two continents collide with each other.
  3. 9. Occurs when the oceanic crust goes under the continental crust.
  4. 12. Hangs off the edge of continents and into the ocean underwater.
  5. 14. The earths crust/lithosphere is broken up into 15 of these.
  6. 15. This ancient type of evidence shows glaciers once existed in Africa and India.
Down
  1. 1. The concept that explains the causes of plate movement.
  2. 2. Name of the supercontinent that was before current continents.
  3. 3. These form when subduction occurs.
  4. 5. Theory that all continents have been moving away from each other.
  5. 7. Area on earth where magma can rise to the surface regularly.
  6. 8. These are found on multiple continents and used as evidence for continental drift.
  7. 10. Type of boundary that explains seafloor spreading.
  8. 11. The pulling of cool dense edges of continental crust into subduction zones.
  9. 13. Type of boundary that causes the worst earthquakes.