| A | B |
|---|
| wave | disturbance that transfers enery from place to place |
| medium | material through which a wave travles |
| mechanical wave | wave that requires a medium |
| vibration | repeated back and forth or up and down movement |
| transverse wave | wave that moves the medium at right angles to the direction in which the wave is traveling |
| crests | highest part of a wave |
| trough | lowest part of a wave |
| longitudinal wave | moves the particles of the medium parallel to the direction in which the wave is traveling |
| compressions | part of the longitudinal wave where the particles are close together |
| rarefactions | part of the longitudinal wave where the particles are spread apart |
| surface wave | a combination of transverse and longitudinal waves |
| amplitude | maximum distance the particles of the medium carring the wave move away from the resting poing |
| frequency | number of complete waves that pass a given point in a certain amount of time |
| hurtz | unit of measurement for frequency |
| angle of incidence | angle between the incoming wave and the imaginary perpendicular line |
| angle of reflection | the angle between he reflected wave and the imaginary wave |
| refraction | the bending of waves |
| interference | the interaction between waves that meet |
| diffraction | bending of waves around the edge of a barrier |
| constructive interference | two waves combine to make a wave with a larger amplitude |
| destructive intereference | two waves combine with each other to produce a smaller wave |
| standing wave | wave that appears to stand in one place even though it is really two waves interfering as hey pass through each other |
| nodes | point where destructive interference causes the two waves to combine to produce and amplitude of zero |
| antinodes | crest and troughs of standing waves |
| resonance | occurs when vibrations traveling through and object match the objects natural frequency |
| primary wave | longitudinal seismic waves |
| secondary waves | transverse seismic waves |
| tsunamis | huge surface waves caused by underwater earthquakes |
| seismographs | detect and measure earthquake waves |
| wavelength | distance between the crest of one wave and the crest of another wave |
| reflection | bouncing back of a wave when it hits a surface through which it cannot pass |
| seismic wave | wave produced by an earthquake |
