| A | B |
|---|
| refraction | the bending of waves due to a change in speed |
| destructive interference | the amplitudes of two waves combine to produce a wave with a smaller amplitude |
| nodes | points on a standing wave where the energy of the wave is zero |
| seismic waves | waves produced by earthquakes |
| tsunami | huge ocean surface wave caused by an underwater earthquake |
| seismograph | records the ground movement caused by seismic waves |
| mechanical waves | waves that require a medium through which to pass |
| transverse | the medium moves at right angles to the direction in which the wave is traveling |
| hertz | the unit associated with frequency |
| wave | a disturbance that transfers energy from place to place |
| crest | the highest part of a wave |
| longitudinal wave | wave that moves the particles of the medium parallel to the direction that the waves is traveling |
| wavelength | the distance between two corresponding parts of a wave |
| speed of a wave | wavelength multiplied by frequency |
| diffraction | the bending of waves around the edge of a barrier |
| interference | the interaction between two waves that meet |
| constructive interference | waves combine to make a wave with larger amplitude |
| standing wave | an incoming wave and a reflected wave combine and the combined wave appears to be standing still |
| resonance | this occurs when vibrations traveling through an object match the object’s natural frequency |
| primary wave | longitudinal seismic wave |
| P waves | arrive at a seismograph first |
| antinode | the highest and lowest points on a standing wave |
| medium | the material through which a wave travels |
| surface wave | wave in a pond or lake |
| reflection | a wave hits a surface through which it CANNOT pass and bounces back |
