Across
- 3. fracture zone between two blocks of rock
- 5. the mind behind the sea floor spreading theory
- 9. the transfer of thermal energy through a liquid or gas: warmer substance rises and cooler substance falls
- 10. the mind behind the continental drift theory
- 11. two plates moving towards each other
- 13. the theory that Earth's outer shell is divided into large slaps of rock called plates
- 14. the theory that the continents are moving due to plate tectonics
- 15. iron was found in the oceanic crust which contributes to evidence of sea floor spreading
Down
- 1. the layer of the earth where convection currents occur
- 2. plates that move away from each other
- 4. plates sliding past one another
- 6. the sideways and downward movement of the edge of a plate of the earth's crust into the mantle beneath another plate
- 7. an undersea mountain chain where new ocean floor is produced
- 8. the theory that the ocean is spreading due to plate tectonics
- 12. crust thin part of the Earth's crust which underlines the ocean basin