1. Seismic waves
Section 4

2. Vocabulary
Seismic wave
P wave
S wave
Surface wave
Tsunami
Seismograph

3. Seismic wave
A wave produced by an earthquake.

4. P wave
A longitudinal seismic wave.
s wave
A tranvsverse seismic wave.

5. Surface wave
A combination of a longitudinal wave and a transverse wave that travels along the surface of a medium.

6. tsunami
A huge surface wave on the ocean caused by an underwater earthquake.

7. seismograph
An instrument used to detect and measure earthquake waves.

8. Video