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What else vibrates when a source object vibrates?
Air molecules
Quiet conversations can reach in between ______ dB.
20dB to 50dB
Give an example of an noise that can reach between 120 dB to 150 dB.
Flying airplane
We can barely hear falling leaves because they are in between ____ decibels.
0 dB to 10 dB
Listening to noises at this level and above can damage our ears.
90 dB and above
Measurement used to measure the loudness of a sound.
Sound Level Meter
True or false. Sound travels faster in gases than in solids.
False.
Correct the sentence. Frequency is the number of high notes in a second.
Frequency is the number of vibrations in a second.
True or false. Sound travels the fastest in solid medium.
True
Arrange the following, from loudest to softest.
Sperm Whale, Lion, Domestic Dog, Howler Monkey
True or false. A loud sound carries less energy than a soft sound.
False.
It is the number of vibrations in a second.
Frequency
A low pitched sound has a ____ frequency.
low
Instrument to measure the loudness of a sound.
Sound Level Meter
A high-pitched sound has ______ frequency.
high
dB stands for ______.
Decibels
Unit for loudness.
Decibels
Write one way to protect our ears from loud noises.
Wear ear protectors.
Give one negative effect of noise.
Damage our ears, etc.
What vibrates when we speak or sing?
Our vocal chords/ vocal chords.
It is the highness or lowness of sound.
Pitch
True or false. Sound can be made softer or louder.
True.
Arrange from fastest to slowest medium that sound can travel.
Solid, liquid, and gas.
What is the unit to measure pitch?
hertz
What are loud and unpleasant sounds?
Noise/s
True or false. Sound can travel in a near-perfect vacuum such as space.
False
List the different medium that sound can travel.
Solid, liquid, and gas.
What does sound needs in order to travel?
Medium
What is sound?
Sound is the energy produced from the vibrations of objects.
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