Name _______________________________________ Date _____________________ Period ___________
Reading Guide 13.1 Volcanoes and Plate Tectonics
Definitions: Define the following terms IN COMPLETE SENTENCES.
1. magma:
2. volcanism:
3. lava:
4. volcano:
5. hot spot:
Answer the following questions IN COMPLETE SENTENCES, where appropriate.
6. The cause of many volcanic eruptions is the ________________________ of tectonic _________________.
The movement of tectonic plates is driven by Earth’s _____________________ heat.
7. What 2 characteristics of Earth’s interior keep rocks below their melting point?
8. Under what 3 conditions can magma form?
9. Why does magma rise upward through the crust?
10. What is a vent?
11. Where do most active volcanoes occur?
12. What is the Pacific Ring of Fire?
13. Explain what happens when oceanic plate collides with a continental plate.
14. Explain what happens when 2 oceanic plate collide?
15. The largest amount of magma comes to the surface where plates are moving __________________ at
mid-________________ ridges.
16. Why don’t humans notice most volcanic eruptions that take place along mid-ocean ridges? What is one
exception?
17. Use the numbers 1 through 4 to show the sequence of volcano development in a hot spot.
________ Volcanoes form in the interior of a tectonic plate.
________ Columns of solid, hot material called mantle plumes rise and reach the lithosphere.
________ Magma rises to the surface and breaks through the overlying crust.
________ A mantle plume reaches the lithosphere, and spreads out.
18. Describe what happens to volcanic activity when the lithospheric plate above a mantle plume continues to
drift.
19. Besides developing within the interior of a lithospheric plate, what is another way a hot spot may form?
20. What is a pluton?