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