Theories on the Formation of the Earth

Edit Answers
123456789101112131415
Across
  1. 3. The lighter crust must be floating on the denser underlying mantle.
  2. 9. Less dense than oceanic crust.
  3. 10. Created when the divergent boundaries molten materials cools and hardens.
  4. 12. Proposed the theory of continental drift.
  5. 14. Massive slabs of rock
  6. 15. Earths solid, rocky lithosphere is broken inti pieces called tectonic plates.
Down
  1. 1. Occurs between 2 plates where molten materials within the earths pushes its way up, causing the plate to move away from each other.
  2. 2. Proposed the idea of seafloor spreading in the early 1960's
  3. 4. He proposed the term isostasy
  4. 5. The crust and mantle would settle into in absence of disturbing forces.
  5. 6. There are lateral changes in rock density across the lithosphere.
  6. 7. The movement of tectonic plates which drift apart from the land which sits on the top ,is the cause for this shift.
  7. 8. Across the lithosphere, the rock density is approximately the same.
  8. 11. Allows the athenosphere to flow like dough or putty.
  9. 13. IT happens when tectonic plates move and rub against each other