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Sound

Sound key terms

QuestionAnswer
The part of a longitudinal wave where the particles are squeezed together Compression
The part of a longitudinal wave where the particles are spread apart Rarefaction
The ability of a material to bounce back after being disturbed Elasticity
What property affects the pitch we hear? Frequency
What property of a wave affects the loudness of a sound? Amplitude
Sound with a frequency too high for humans to hear Ultrasound
Sound with a frequency too low for humans to hear Infrasound
A sound wave that is reflected as it strikes an object Echo
How will adding foam around an object affect the sound we hear? The foam absorbs the vibrations, making the sound softer
What is the unit for frequency? Hertz (Hz)
What unit is loudness measured in? Decibels (dB)
What are the three bones in the middle ear called? Hammer, Anvil, & Stirrup
Which part of the ear transmits a signal to the brain? Cochlea
What type of wave is sound? Longitudinal & Mechanical
If you hit a drum harder, how will it sound? Louder, you are using more energy, which affects the amplitude
Why does a flute have a higher pitch than a tuba? Smaller objects vibrate faster, making a higher pitch (frequency)
All sounds are created when an object moves or causes... Vibrations
Why did the salt bounce around on the plastic wrap? Sound waves disturbed the plastic wrap causing the salt to move
What material does sound travel fastest through? Solid; because as the object vibrates it pushes against the air molecules creating compressions and rarefactions.
Will a flute or a drum create sound with a longer wavelength? drum; because it is larger
Created by: 6thGradeScience