front 1 rarefaction | back 1 the area where particles are farthest apart (the opposite of compression) |
front 2 compression | back 2 the area where particles are closest together |
front 3 pitch | back 3 how high or low a sound is, determined by the frequency of sound waves |
front 4 volume | back 4 How loud or quiet a sound is, determined by the amplitude of sound waves |
front 5 amplitude | back 5 ![]() the height of the wave from its resting point to its peak (or crest), or from its resting point to its trough |
front 6 frequency | back 6 ![]() the number of wave cycles (or crests/troughs) that pass a certain point in one second, measured in Hertz (Hz) |
front 7 reflection | back 7 The bouncing back of a wave when it hits a surface |
front 8 refraction | back 8 The bending of a wave as it passes from one medium to another |
front 9 diffraction | back 9 The bending of waves around obstacles or through openings |