SEISMIC WAVES

2. an S-wave that moves the ground perpendicular to the direction the wave travel.
5. a wave that can only travel in solid material.
8. to find or follow a path from one place to another.
9. a material or substance where seismic waves travel.
11. vibrations that travel through Earth after an earthquake.
12. a technique that uses seismic waves to create images of Earth's internal layers.
13. the weakening of seismic waves as they travel.
14. related to the study of Earth's physical properties using scientific methods.

1. a boundary where Earth's material or layers change.
3. a wave that can travel both solid and liquid material.
4. the bending or changing direction of seismic waves when they enter a different material.
5. an instrument used to detect and record seismic waves.
6. having many small and complicated parts.
7. a repeated shaking or movement of an object.
10. the return of seismic waves after striking a boundary.