Quiz#: 4 VOLCANOES & PLATE TECTONICS

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