chapter 14

2. Molten rock beneath Earth's surface.
3. A sudden release of energy along a fault, causing ground shaking.
4. Evidence Wegener used, showing similar species on continents now separated by oceans.
9. A steep-sided volcano built by alternating layers of lava and pyroclastics.
11. Fragments of volcanic material ejected during an eruption.
12. A vertical or near-vertical igneous intrusion cutting across rock layers.
14. Plate boundary where plates slide past each other, causing earthquakes.
16. A stationary mantle plume creating volcanic activity, such as at Hawaii.
17. A small, steep-sided volcano formed from pyroclastic material.
19. The theory explaining the movement and interaction of Earth's plates.
20. A broad, gently sloping volcano formed by fluid lava flows.
21. Plate boundary where plates move apart, creating new crust.
22. An intrusive igneous rock body formed underground.

1. A small, rounded volcano formed by thick, viscous lava.
5. The process creating new crust at mid-ocean ridges, driving plate movement.
6. Plate boundary where plates collide, forming mountains or subduction zones.
7. A large, deep-seated igneous intrusion.
8. The point beneath Earth's surface where an earthquake originates.
10. Molten rock that has erupted onto Earth's surface.
11. Large rigid segments of Earth's lithosphere that move over the asthenosphere.
13. The supercontinent proposed by Alfred Wegener in his theory of continental drift.
15. The point on Earth's surface directly above the earthquake's focus.
18. The flow of heat in the mantle, driving the movement of tectonic plates.