Sound and Vibration Flashcards

Grade 3 · Science · Flashcards

Study key vocabulary for sound, vibration, and waves.

Flashcards

vibration: Rapid back-and-forth motion that produces sound
sound wave: A traveling disturbance through matter that carries sound energy
pitch: How high or low a sound is
volume: How loud or soft a sound is
frequency: The number of vibrations per second; measured in Hertz (Hz)
amplitude: The size of a vibration; larger amplitude = louder sound
eardrum: The membrane in your ear that vibrates when sound reaches it
medium: The material sound travels through, such as air, water, or solid
vacuum: Empty space with no matter; sound cannot travel through a vacuum
echo: A sound that bounces off a surface and is heard again
decibel: The unit used to measure how loud a sound is
ultrasound: Sound waves with frequencies too high for humans to hear, used by bats and dolphins