History of the Earth-Land Before the Continents

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Across
  1. 3. the flat space between the mid-ocean ridges at a divergent boundary; consists of new ocean floor.
  2. 8. this seed fossil was found on the continents of Africa, South America, Australia, India, and Antarctica; supported the idea that the continents must have been connected at one time.
  3. 9. theory that states that Earth's plates were once one huge landmass that broken apart over time and drifted to where they are today.
  4. 10. this occurs at divergent boundaries where new ocean floor is formed.
  5. 13. one huge landmass that existed 300 million years ago.
  6. 14. German scientist who made up the theory of continental drift.
  7. 15. (type of boundary) when two plates move past each other or up and down.
Down
  1. 1. the movement of material caused by changes in temperature.
  2. 2. the edges of Earth's plates where two or more plates meet.
  3. 4. underwater mountain chains formed at a divergent boundary due to the piling up of magma.
  4. 5. (type of boundary)when two plates move apart.
  5. 6. a trace of an ancient organism that has been preserved in rock.
  6. 7. 'v-shaped' valley formed at a subduction zone in the ocean.
  7. 11. (type of boundary)when two plates move toward each other.
  8. 12. a theory explaining the structure of the earth's crust and slow movement over the underlying mantle.