Across
- 2. continental crust containing silica and aluminum
- 3. a sudden violent shaking of the crust
- 5. a vent or opening in the crust from which magma can reach the surface
- 7. a more specific term for the subduction zone
- 8. oceanic crust containing silica and magnesium
- 10. landforms created when continental plates collide
- 12. a force causing plate movement as plates are pulled into subduction zones
- 13. the supercontinent that existed billions of years ago
- 16. scientist who first proposed theory of plate tectonics
- 17. the central layer of the earth formed of iron and nickel
- 19. a layer of the earth containing the crust
- 23. the longest mountain range in the world
- 24. a force causing plates to move away from ocean ridges
- 25. a deep sea landform located where subduction occurs
- 27. the act of one plate being forced under another due to higher density
Down
- 1. an intense area of heat in the mantle that burns through the lithosphere
- 2. Hess' theory that was proved by paleomagnetism
- 4. a ductile layer of the earth in which convection occurs
- 6. a landform created by oceanic-oceanic subduction
- 9. the magnetic alignment of minerals
- 11. the study of ancient magnetism in rock
- 14. a plate boundary where plates move parallel to one another
- 15. found at right angles to ocean ridges- like discs in a spine
- 18. when a recumbent fold collapses on itself
- 20. a landform created when continental plates diverge
- 21. valleys found between horsts
- 22. a large wave caused by underwater tectonic activity
- 26. a block shaped landform created as plates separate