Waves

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Across
  1. 2. place inside the earth's crust where the earthquake originates.
  2. 4. the distance between successive points on a wave
  3. 5. the point on the earth's surface above the focus
  4. 7. wave, a seismic wave trapped near the surface of the earth.
  5. 10. a person who studies earthquakes.
  6. 12. sudden slip on a fault resulting in the ground shaking.
  7. 13. tectonics, a theory in geology that the lithosphere is divided into a small number of sections that travel over the mantle.
  8. 14. movement caused when hotter less dense material rises and cooler denser material sinks
Down
  1. 1. first wave to arrive at a seimograph.
  2. 3. shakes the ground perpendicular to the direction the wave is moving.
  3. 6. scale, a mathematical devise used to compare the size of earthquakes
  4. 8. mountains, formed when two or more tectonic plates are pushed together
  5. 9. a long crack in the surface of the earth where an earthquake can occur
  6. 10. wave, a wave generated by an earthquake
  7. 11. formed when two tectonic plates collide and one plate is submerged under the other.