Tic-Tac-Tonics

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Across
  1. 4. Seafloor mountain system formed by divergent boundaries
  2. 6. Supercontinent that incorporated most all of the landmasses on Earth
  3. 7. When two tectonic plates move towards each other and collide
  4. 8. when 2 plates slide or move past each other
Down
  1. 1. Tectonic plates that lie under surface land masses
  2. 2. Tectonic plates that are at the bottom of the ocean
  3. 3. When two plates move away from each other
  4. 5. a scientist who studies the forces that make and shape earth