Across
- 3. the Greek word meaning "all the Earth"
- 5. magnetic reversing led scientists to the idea of
- 7. plate tectonics descending below the edge of another
- 9. a long,steep valley between two rifts
- 10. measures the mag
Down
- 1. a place between two tectonic plates that are moving away from eachother
- 2. theory of how Earth's continents shift
- 4. place where plates slide past eachother
- 6. the study of the magnetic record in rocks is called
- 8. the process that takes place at convergent boudaries