Across
- 6. this cools and hardens to form new oceanic plates
- 7. the boundary where a continental plate and an ocean plate crash into each other
- 8. the California zone of the active transform fault
- 9. the type of boundary were the ocean floor is pulling apart
- 10. the ocean that surrounded Pangaea
- 11. a fairly rigid layer of the earth's curst that is broken into a number of plates
Down
- 1. loose material, such as mud, that settles at the bottom of the sea floor
- 2. this reversed direction every million years
- 3. converts vibrations in the earth into electric signals used to measure earthquakes
- 4. the earth's ___ can rise to the surface in volcanoes
- 5. a system of deep depressions in the sea floor
- 8. Self Contained Underwater Breathing Apparatus