Across
- 2. silicon aluminum What is crust made out off?
- 3. What is the Greek word for tectonics
- 6. Drift What is the hypothesis that states that the continents once formed a single landmass, broke up, and drifted to their present locations?
- 7. current What type of energy transfer is believed to drive plate movement?
- 9. The strong lower part of the mantle.
- 10. A trace of an ancient Human/Animal that has been preserved in rock.
- 13. million years ago Pangea split apart again
- 15. Layer of Earth between the crust and the core, contains much of earth's mass.
- 16. What was the earth called when the plates didn't split
- 17. sea floor spreading been proposed at what age
- 23. outer layer that consists of crust and rough part of the mantle.
- 26. waves vibrations that travel through the Earth carrying the energy released during an earthquake
- 27. Boundary What is the boundary formed by the collision of two lithospheric plates?
- 29. tension in the earth
- 30. Plates slide relative to each other.
- 31. America, Africa, Antarctica and Australia What Continents formed Gondwanaland.
- 33. million years ago How long was pangea?
- 38. Outermost Layer
- 39. to One Hundred km How thick is the crust?
- 40. Whats located below the mantle and to the center of the earth?
- 41. The core is made out of what?
Down
- 1. convergent boundary What is created at this type of boundary
- 4. Tectonics Pieces on the lithosphere that move around
- 5. core: A dense sphere of solid iron and nickel at the middle of the Earth is called what?
- 8. Force extreme pressure squeezing on an object,
- 11. convergent boundary What volcanic mountain ranges are formed at these types of boundaries?
- 12. boundary San Andreas Fault, sliding past each other horizontally.
- 14. valley long, narrow depression formed at divergent boundaries is called what?
- 18. America, Europe, and Asia What Continents formed Laurasia.
- 19. The soft layer which tectonic plates move.
- 20. Hess Who Proposed sea-floor spreading as a mechanism for continental drift?
- 21. Boundary What are the boundary between two tectonic plates that are moving away from each other?
- 22. spreading What is the process by which new oceanic lithosphere forms as magma rises towards the surface and solidifies?
- 24. What occurs where plates collide and the more dense plate is pushed down under the less dense plate?
- 25. Which scientist who studies the force that make and shape planet earth are called what
- 28. Discontinuity What is the boundary between the crust and the mantle
- 32. University Which school was seafloor spreading come from.
- 34. trench The process of subduction creates this at an oceanic oceanic convergent boundary makes what?
- 35. Lift up of reigns to a higher elevation.
- 36. Wegner Who thought of the continental drift theory?
- 37. Bending rock layers from stress.