| A | B |
|---|
| medium | substance through which waves can travel |
| Waves | disturbances that transfer energy for place to place |
| Ocean waves | carry energy along the surface of the water |
| Where does the energy of ocean waves come from? | wind moving over the water |
| How do particles of a medium move? | in small circles |
| Air | a medium for sound |
| Light waves | travel through the vacuum of space |
| Particles of a medium | do not move past a wave |
| What happens a wave travels through a medium? | only energy moves from place to place |
| Compression | part of a medium where the particles are close together in a longitudinal wave |
| Longitudinal wave | wave in which the particles of the medium move back and forth in the direction of the wave motion |
| rarefaction | part of a medium where the particles are far apart in a longitudinal wave |
| transverse wave | wave in which the particles of the medium move up and down at right angles to the direction of the wave motion |
| Crest | high point of a transverse wave |
| Trough(trowf) | the low point of a transverse wave |
| Amplitude | height of a wave |
| Frequency | number of complete waves pasing a point in a given time |
| Hertz | unit used to measure the frequency of a wave/ equal to one wave per second |
| Wavelength | distance between two neighboring crests or troughs |
| Speed = | frequency x wavelength |
| reflection | bouncing of a wave after striking a barrier |
| refraction | bending of a wave as it moves from one medium to another |
| The angle of incidence is equal to | the angel of refraction |
