Across
- 2. a type of plate boundary where two plates are moving away from each other, and new crust is produced. The Mid-Atlantic Ridge is an example.
- 8. hypothesis proposed by Alfred Wegener that says that continents were once attached as a single continent Pangea and have since moved apart
- 9. solid layer of the earth made of iron and nickel.
- 10. evidence for seafloor spreading that shows symmetrical patterns of normal magnetic signatures, and reversed magnetic signatures to either side of the mid-ocean ridge.
- 12. this region of the earth includes the crust and the uppermost, rigid mantle. AKA the "plates" of plate tectonics.
- 13. the outermost layer of earth. There are two types, continental and oceanic.
Down
- 1. hypothesis proposed by Harry Hess that describes the production of new crust (and the formation of ocean basins) along divergent boundaries called mid-ocean ridges.
- 3. type of boundary where two plates slide past one another without converging or diverging. The San Andreas Fault is an example.
- 4. a type of plate boundary where to plates are moving towards each other. Crust is recycled back into the mantle, or crumpled
- 5. device used to measure magnetic signatures in rocks
- 6. plastic-like layer of the upper mantle on top of which the lithospheric plates move
- 7. liquid layer of the earth made of iron and nickel - generates earth's magnetic field.
- 11. largest layer of earth and region where convection occurs