Chapter 9 vocab words

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Across
  1. 4. The process that occurs when one tectonic plate moves another tectonic plate.
  2. 7. An event causes a magnetic field to reverse direction.
  3. 8. The movement of Earth’s continents over time.
  4. 9. The circulation of particles within a material caused by differences in thermal energy and density.
  5. 10. Theory that Earth’s surface is broken into large, rigid pieces that move with respect to each other.
  6. 11. The boundary between two plates that slide past each other.
Down
  1. 1. Long, narrow mountain range on the ocean floor; formed by magma at divergent plate boundaries.
  2. 2. The process by which new oceanic crust forms along a Mid-ocean ridge and older oceanic crust moves away from the ridge.
  3. 3. The boundary between two plates that move towards each other.
  4. 5. The boundary between two plates that move away from each other.
  5. 6. Name given to a supercontinent that began to break apart approximately 290 million years ago.