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39 terms

sound energy

5th grade sound energy
STUDY
PLAY
Mechanical waves
forms when a disturbance causes energy to be transferred through matter such as air or water
Vibration
a rapid back-and-forth movement of an object
Pitch
how high or low you perceive the sound to be
Volume
how loud or soft a sound is
A sound with ________ frequency has _______ pitch.
low frequency has low pitch
A sound with high _________ has _________ pitch.
high frequency high pitch
The number of vibrations per second of the sound.
frequency
How high or low you perceive a sound to be
pitch
A form of energy that is produced by vibrations of an object.
sound
The loudness of a sound.
volume
Describe three ways instruments produce sound?
A reed vibrates when you blow into it, hit a drum, plucks strings
How do sound waves travel
They move in all directions from an object that makes a sound.
How do they measure sound?
In decibels (dB)
How does a bat fly at night?
The bats can produce sound that hits objects and bounces back in the form of a echo. The echo's help give information about the surroundings.
How does a woodwind instrument create sound?
Through a thin piece of wood called a reed.
How does sound travel?
In the form of compressed waves
Sound is a form of energy that travels through ___________?
Air
Sound travels faster in a __________ and a _____________ than it does in a gas.
solid and liquid
The speed of the sounds depends on what?
The type of medium which it's moving through.
What absorbs more sound a soft object or a hard object?
A soft object.
What happens when sound waves hit something?
Some of the energy is absorbed, some is reflected
What has higher frequency a tuba or a trumpet?
A trumpet
What is the difference between sound waves and light waves?
Sound waves travel in compressions in matter, but light does not compress matter.
Amplitude
in sound, this determines how loud the sound is
Compression
the areas where the particles of a longitudinal wave are compressed "bunch up"
Decibel
the units we use to measure how loud the sound is
Frequency
the number of waves in a certain period of time
Hertz
the units we use to measure frequency
Transverse wave
particles move perpendicular to the direction of the wave
Mechanical wave
waves that have to have a medium - they can't travel through empty space
Medium
any matter that waves travel through
Pitch
how high or low the sound is
Rarefaction
the areas where the particles of a longitudinal wave are sparse
Reflection
the bouncing back of a sound wave after it hit a surface
Sound energy
energy that comes from vibrating particles
Vibration
small, rapid (quick) back and forth movement
Wave
disturbance that carries energy through matter or through empty space
Wave speed
how fast the wave travels
Wavelength
the space from the middle of one compression to the middle of the compression next door to it