Terms : Hide Images
| 16311654880 | REFLECTION | Energy waves bouncing off surface of an object (mirrors or echoes return energy back to their source) |  | 0 |
| 16311654881 | ECHO | Reflected sound wave |  | 1 |
| 16311654882 | LOUDNESS | Characteristic of sound produced by amplitude (intensity) of sound wave. |  | 2 |
| 16311654883 | PITCH | Perceived highness and lowness of a sound, depending on frequency of the waves |  | 3 |
| 16311654884 | FREQUENCY | Number of vibrations occurring in a 1 second interval |  | 4 |
| 16311654885 | COMPRESSION | Part of a longitudinal wave where the particles of the medium are close together |  | 5 |
| 16311654886 | RAREFACTION | Part in a longitudinal wave where particles are spread apart |  | 6 |
| 16311654887 | INTERFERENCE | When two waves meet while traveling along same medium |  | 7 |
| 16311654888 | DIFFRACTION | Occurs when an object causes a wave to change direction and bends around it |  | 8 |
| 16311654889 | SPEED OF SOUND | depends on state of matter and temperature of medium |  | 9 |
| 16311654890 | AMPLITUDE | Loudness, for a wave, measures energy in a wave |  | 10 |
| 16311654891 | LONGITUDINAL (Compressional) WAVE | Wave that causes particles of medium to vibrate parallel to direction the wave travels |  | 11 |
| 16311654892 | VIBRATION | Repeated back and forth or up and down motion. |  | 12 |
| 16311654893 | HERTZ | unit of frequency |  | 13 |
| 16311654894 | MEDIUM | Substance through which a wave can travel (Railroad workers put their ear to track to listen for oncoming trains) |  | 14 |
| 16311654896 | High pitch | High frequency |  | 15 |
| 16311654897 | Low Pitch | Low frequency |  | 16 |
| 16311654898 | Increase in frequency | Caused by decrease in wavelength | 17 | |
| 16311654899 | Doppler Effect | A change in sound frequency caused by motion of the sound source, motion of the listener, or both. |  | 18 |
| 16311654900 | sound | A disturbance that travels through a medium as a longitudinal wave; caused by vibrations |  | 19 |
| 16311654901 | mechanical wave | a wave that requires a medium through which to travel | 20 |
