Quiz#: 4 VOLCANOES & PLATE TECTONICS
Across
- 6. An example of early stages of island arc are the
- 7. magma that flows onto Earth's surface; the rock that forms when it cools and solidifies
- 10. A vent or fissure in Earth's surface through which magma and gases are expelled
- 11. small tubular plutons; may be only a few centimeters wide
- 15. Scientists can learn more about volcanic eruptions by studying ____________ within the Earth
- 17. large plutons that cover an area of at least 100 km2 when exposed on Earth's surface
- 19. rocks that form when magma cools
- 20. Any activity that includes the movement of magma toward or onto Earth's surface
Down
- 1. large formation of igneous rocks, created by magma that does not reach Earth's surface, but cools and solidifies inside the crust
- 2. Sometimes Earth's solid mantle and crust melt to form
- 3. as hot bodies of magma rise toward the surface and melt surrounding rock they become
- 4. Cause of many volcanic eruptions is the movement of
- 5. the islands that make up ______ are island arcs that have joined to form one landmass
- 8. Volcanic eruptions can be more powerful than a(n)
- 9. lava flows from an opening in Earth's surface called
- 12. many volcanoes are located along _______ zones
- 13. combined temperature & pressure in the lower part of Earth's mantle keeps rocks below their
- 14. the movement of tectonic plates is driven by Earth's internal
- 16. The pacific ring of fire is also one of Earth's major __________ zones
- 18. When oceanic lithosphere subducts beneath oceanic lithosphere, magma rises to the surface to form a(n)