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