Plate Tectonics
Across
- 1. What type of boundary forms subduction?
- 4. What type of boundary forms rifts and ridges?
- 6. What pattern do volcanoes normally form on a map?
- 7. What layer of the Earth has a convection cycle, ultimately causing plate tectonics?
- 8. What is created at a transform boundary (besides an earthquake)?
- 10. Hess originally discovered this phenomena
- 12. What theory comprises the phenomenon that the plates "drift" across the lithosphere?
- 13. What type of valley forms at a divergent plate boundary?
- 14. What force in the mantle moves the plates?
Down
- 2. What is one sign of a active volcano?
- 3. What type of wave does a seismograph read?
- 5. What is the innermost layer of the Earth?
- 6. What scientific rule says that matter cannot be created nor destroyed?
- 9. What ridge is formed at a divergent plate boundary?
- 10. How is old plate material "recycled" back into the Earth?
- 11. What phenomena did Alfred Wegener discover?