Across
- 3. A theory in geology: the lithospherebof the earth is divided into small number of plates which float on and travel independently over the mantle and much of the earth's seismic activity occurs at the boundaries of these plates.
- 7. Eruption A geologic hazard in which molten rock- called magma or lava- gases, ash, and other material are released onto Earth’s surface and into the atmosphere.
- 10. Chamber The body of molten rock that feeds a volcano.
- 12. A wave of energy that travels through the Earth, away from an earthquake in all directions.
- 15. A tracing of earthquake motion that is created by a seismograph
- 16. The place inside Earth's crust where an earthquake originates
- 17. tectonics The theory that explains how large pieces of Earth’s outermost layer called tectonic plates move and change shape.
Down
- 1. An instrument that records vibrations in the ground and determines the location and strength of an earthquake.
- 2. A seismic wave that causes particles of rock to move in a back and forth direction.
- 4. molten rock/magma that reaches the earth's surface
- 5. The point on the earth's surface directly above the place that earthquake occured
- 6. A geologic hazard in which molten rock- called magma or lava- gases, ash, and other material are released onto Earth’s surface and into the atmosphere.
- 8. Movement of the Earth’s crust that occurs when rocks suddenly break and release stored energy.
- 9. An opening at the surface of the Earth through which volcanic material passes.
- 11. Molten rock BELOW the Earth’s surface
- 13. The study of Earthquakes
- 14. A vent or fissure in the Earth’s surface through which magma and gases are expelled