1. Match the vocabulary to the appropriate definition.

______ Doppler Effect 1. your ear’s perception of a low frequency sound, like the rumble of thunder
______ frequency 2. your ear’s perception of a high frequency sound, like the sound of a squeaky mouse
______ high pitch 3. the distance from crest to crest or trough to trough

______ low pitch 4. the change in frequency when a sound source or observer is moving
______ wavelength 5. how often a wave repeats