Across
- 3. theory that the ocean floor spreads apart as new crust is formed at the mid oceanic ridge
- 7. a transverse earthquake wave that travels through the interior of the earth and is usually the second conspicuous wave to reach a seismograph. Also called secondary wave.
- 9. an earthquake wave that travels around the earth's surface and is usually the third conspicuous wave to reach a seismograph. Also called the long wave
- 10. Theory that the major landmasses of the earth move
- 11. to furnish with drawings, pictures, or other artwork intended for explanation, elucidation, or adornment.
- 13. single landmass from which the continents separated
- 14. volcano with wide crater, developing from layers of lava
Down
- 1. small volcano with steep sides and explosive eruptions made of ash and rock
- 2. tall volcano formed from eruptions of ash and rock followed by quite lava flow
- 4. scale a scale used to measure the strength of an earthquake
- 5. a longitudinal earthquake wave that travels through the interior of the earth and is usually the first conspicuous wave to be recorded by a seismograph. Also called the primary wave
- 6. point on the earth’s surface directly over the focus of an earthquake
- 8. theory that the earth’s surface us made up of large sections that move
- 12. break in the earth’s crust along which movement occurs