Earth's Plates

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Across
  1. 8. part of the continent that is under the ocean
  2. 10. the deepest valleys on Earth's surface,oldest rock is here.
  3. 11. scientist who proposed the idea of continental drift.
  4. 12. new magma comes out of this and the youngest rock is near this area.
Down
  1. 1. process of old oceanic crust breaks along the mid ocean ridge and two pieces of crust move away in opposite directions from each other.
  2. 2. boundary where two plates pull apart, forms mid ocean ridges and ocean basins
  3. 3. plates that fit together like a jigsaw puzzle to form Earth's out shell.
  4. 4. Earths crust is stretched by forces within Earth,gap opening at the mid-ocean ridge
  5. 5. when forces continue pulling apart Earth's crust when it is a linear sea.
  6. 6. giant landmass when continents all fit together like puzzle pieces
  7. 7. plates that are colliding can form mountains and volcanoes erupt.
  8. 9. plates that slide horizontally past each other volcanoes do not form from these.