Landen's puzzle

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Across
  1. 5. earthquake recording instrument
  2. 7. Seismic waves tell us that the Earth's interior consists of a series of concentric shells, with a thin outer crust, a mantle, a liquid outer core, and a solid inner core. P waves, meaning primary waves, travel fastest and thus arrive first at seismic stations.
  3. 9. different types of waves
  4. 11. : a measure of the degree of earthquake shaking at a given locale based on the amount of damage.
  5. 13. A fault is a fracture or zone of fractures between two blocks of rock. Faults allow the blocks to move relative to each other.
  6. 15. study of earthquake waves
  7. 16. Study of past earthquakes
  8. 17. The earth is made up of three different layers: the crust the mantle and the core. This is the outside layer of the earth and is made of solid rock, mostly basalt and granite. There are two types of crust; oceanic and continental. Oceanic crust is denser and thinner and mainly com​posed of basalt.
  9. 18. the record of the earth moving( the reading of it)
  10. 19. Earthquakes of lesser magnitude occurring after the major earthquake
Down
  1. 1. The intensity is a number (written as a Roman numeral) describing the severity of an earthquake in terms of its effects on the earth's surface and on humans and their structures. Several scales exist, but the ones most commonly used in the United States are the Modified Mercalli scale and the Rossi-Forel scale.
  2. 2. Location where slippage begins
  3. 3. A megathrust earthquake is a very large earthquake that occurs in a subduction zone, a region where one of the earth's tectonic plates is thrust under another. The Cascadia subduction zone is located off the west coast of North America.
  4. 4. point on earths surface directly above the hypocenter
  5. 6. the measure of the largest seismic wave.
  6. 8. tectonic theory. The theory of plate tectonics states that the Earth's solid outer crust, the lithosphere, is separated into plates that move over the asthenosphere, the molten upper portion of the mantle
  7. 10. Earthquakes are vibrations of the Earth produced by the release of energy during a sudden rupture of the Earth. A. There are two types of vibrations produced by earthquakes
  8. 12. the global distribution of earthquakes in specific zones.
  9. 14. ▪earthquakes of lesser magnitude occurring after the major earthquake.