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