Volcanoes and Plate Tectonics
Across
- 1. this is a type of evidence that continents are moving
- 5. this type of volcano has explosive eruptions followed by outpourings of lava
- 6. pieces of the crust that float on the mantle
- 12. this crust is made from basalt rock and is very dense
- 15. the force responsible for plate movements
- 17. theory that explains that crustal plates are moving the mantle
- 18. Volcanoes can shoot ___ high into the atmosphere
- 19. 75% of Earth's volcanoes happen here
- 20. places where the sea floor is spreading
Down
- 2. this type of volcano looks like a giant ______
- 3. a mountain that forms when magma is forced to the Earth's surface
- 4. this crust is granitic and 20-30 miles thick
- 7. technical name for the crust and upper mantle
- 8. clouds of hot ash and volcanic glass flowing down the mountain side
- 9. this part of the Earth is made of iron and nickel
- 10. These can block out the sun light
- 11. contains most of Earth's mass
- 13. german scientist who originated the continental drift theory
- 14. this happens when new oceanic crust is created and older material is pushed away
- 16. small volcanoes made from ash and rocks