Science Crossword

2. The focus is the point within the earth where an earthquake rupture starts
7. the largest earthquake in a sequence, sometimes preceded by one or more foreshocks, and almost always followed by many aftershocks
8. (2 words) The fastest of seismic waves
9. (3 words) ) A steep, conical hill consisting of glassy volcanic fragments that accumulate around the vent
13. (2 words) A large underground pool of liquid rock found beneath the surface of the Earth.
15. a change in shape of rock caused by stress and strain
17. (2 words) large, thin, relatively rigid plates of crust that move relative to one another on the outer surface of the Earth
19. (2 words) Surface waves that move like a snake
21. A volcano that is not presently erupting and is not likely to do so for a very long time in the future
24. A shaking caused by the collision and tension of tectonic plates

1. (2 words) Surface waves that move like a transverse wave
3. (2 words) A broad volcano with gently sloping sides, characteristic of the eruption of fluid, basaltic lava.
4. The study of earthquakes
5. A smaller earthquake that comes before the mainshock
6. A process by which water-saturated sediment temporarily loses strength and acts as a fluid
9. (2 words) A conical volcano built up by many layers of hardened lava, tephra, pumice, and volcanic ash
10. (2 words) The term is used to describe a volcano which is presently inactive but which may erupt again
11. (2 words) A scale that measures intensity of the earthquake, but not damage
12. (2 words) A volcano that is erupting. Also, a volcano that is not presently erupting, but that has erupted within historical time and is considered likely to do so in the future.
14. A fracture in the crust
16. (3 words) the zone of earthquakes surrounding the Pacific Ocean- about 90% of the world's earthquakes occur there
18. (2 waves) an elastic wave generated by an impulse such as an earthquake or an explosion
20. The point on the earth's surface vertically above the focus
22. A sea wave of local or distant origin that results from large-scale seafloor displacements associated with large earthquakes
23. A circular depression in the ground caused by volcanic activity