Chapter 7 Vocabulary
Across
- 5. drift which suggested that continents are in constant motion on the surface of Earth
- 7. polarity is a state in which magnetized objects
- 8. tectonics is Earth's surface that us made of rigid slabs of rock, or plates, that move with respect to eachother
- 9. the circulation of material caused by differences in temperature and density
- 11. ridges are longer than any mountaint range on land
- 13. spreading is the process by which new oceanic forms along a mid-ocean ridge and older oceanic crust moves away from the ridge
- 15. push the rising mantle material at mid-ocean ridges creates the potential for plates to move away from the ridge with a force
Down
- 1. is the denser plates that sink below the more buoyant plate in a process
- 2. plate boundary forms where two plates separate
- 3. plate boundaries form where two plates collide
- 4. reversal occurs and the magnetic field reverses direction
- 6. plate boundary forms where two plates slide past eachother
- 8. idea that all of the continents were part of a supercontinent
- 10. is the cold and rigid outermost rock layer
- 12. pull a slab sinks it pulls on the rest of the plate with a force
- 14. polarity is a state in which magnetized objects would reverse direction and orient themselves to point south