Across
- 2. __________ are the big pieces of Earth's crust that makes up its crust
- 4. the most explosive eruptions come from this type of volcano
- 6. ___________ is a molecule of silicon oxygen
- 9. _________ are zones where one tectonic plate sinks, or subducts, beneath another
- 10. the _________ is the area between the crust and the core of the Earth
- 12. __________is magma that cooled quickly after it erupted
- 14. an _________ has not erupted for over 10,000 years
- 16. this type of volcano is formed when thick lava oozes from a vent, piles up, and cools into a steep mound
- 18. _________ is the area deep below a volcano where magma collects
- 19. this type of volcano forms when erupted fragments harden and fall to the ground,accumulating around the vent in a cone shape
Down
- 1. ___________are caused by under sea earthquakes
- 3. a __________is a swirling cloud of hot gas, ash, and rocks
- 5. an _________ is a volcano that erupted recently or might erupt soon
- 7. an __________ is a tectonic plate that is under a continent
- 8. a __________ or sleeping volcano has been quiet for a long time, but may erupt again someday
- 9. this type of volcano has gentle slopes formed by oozing, runny lava
- 11. an __________ is a tectonic plate that is under an ocean
- 13. ___________ are tools that that measure the shaking of the Earth's crust
- 15. __________is another word for earthquake
- 17. _________ is a light rock filled with holes like a sponge