Across
- 4. this accumulated in the stratosphere and shielded Earth from the ultraviolet rays of he sun
- 5. a small,intense storm formed when a vertical cylinder of rotating air develops
- 7. where shield volcanos form over
- 12. the driving force for all mechanisms of tectonic plate movement(two words)
- 14. earthquake waves that have the greatest speed as they move in Earth(two words)
- 17. an air mass that would most likely be moist and warm(two words)
- 19. this action o he Earth is the reason we have day and night
- 20. the gas which makes up most of the Earth's atmosphere
Down
- 1. a broad, flat structure made of layer upon layer of lava(two words)
- 2. this technology advancement was used to reveal sea floor spreading and supports the Continental Drift Theory
- 3. common to and only found in diverging regions(two words)
- 6. this type of front forms when two unlike air masses form a boundary, but neither is moving
- 8. he first proposed the hypothesis of Continental Drift
- 9. a break in a rock mass along which movement occurs
- 10. an interaction of air masses(two words)
- 11. the pattern of weather, in a region, over many years
- 13. this is where plates slide past each other and the crust is neither created nor destroyed(two words)
- 15. not a kind of wind(two words)
- 16. this is the part of an earthquake that Richter magnitude measures
- 18. where most weather takes place