Plate tectonics

4. a sudden and violent shaking of the ground, sometimes causing great destruction, as a result of movements within the earth's crust
6. a long high sea wave caused by an earthquake or submarine landslide
9. boundary occurs when two tectonic plates move away from each other
10. boundary is a place where plates slide sideways past each other
12. is a fracture or zone of fractures between two blocks of rock
14. is not expected to ever erupt again
15. is an opening in the earth's crust through which lava, volcanic ash, and gases escape

1. have not erupted for a very long time but may erupt at a future time
2. is a channel for conveying water or other fluid
3. hot molten or semifluid rock erupted from a volcano or fissure, or solid rock resulting from cooling of this
5. the point on the earth's surface vertically above the focus of an earthquake
7. hot fluid or semifluid material below or within the earth's crust from which lava and other igneous rock is formed on cooling
8. waves a wave of energy that travels through the Earth and away from an earthquake in all directions
11. zone is a collision between two of Earth's tectonic plates where one plate sinks into the mantle underneath the other plate
13. boundary occurs when plates move towards each other and collide
16. is the outermost shell of a planet