Sound Waves
All sound must come from a _________________ and is a form of ____________.
Sound moves the fastest through... (choose 2 words)
Cold Solids
Warm Liquids
Hot Gasses
Hot Solids
How are frequency and pitch related?
When one increases, so does the other.
High frequency = high pitch
What frequency range can humans hear?
20-20,000 Hertz
What is energy that travels in waves through matter and can be heard?
Sound
Sound moves in ___________________ waves.
Choose TWO!
A. Transverse
B. Longitudinal
C. Compression
D. Straight
B & C
The particles are close together in this-
A. Solid
B. Liquid
C. Gas
A. Solid
What is the highness or lowness of a sound?
Pitch
Name two animals that use echolocation on a daily basis.
What unit is used to measure the energy, or amplitude of a wave, and how do you write it?
Decibel (dB)
The part where the particles are close together.
The particles are spread far apart in this-
A. Solid
B. Liquid
C. Gas
Which is not true of how to change the frequency of a sound wave?
A. change the pitch
B. slow the wave down
C. speed the wave up
D. give the wave more energy
When you turn up the volume, what part of the wave changes?
A. Crest
B. Trough
C. Wavelength
D. AmplitudeD. Amplitude
What unit is used the measure the frequency of a sound wave, and how do you write it?
Hertz (Hz)
Match the parts of a sound wave.
1. Wavelength 2. Trough 3. Crest 4. Amplitude
A. The height of the sound wave.
B. The top of the sound wave.
C. The bottom of the sound wave.
D. The distance from one crest to the next.
1- D, 2 - C, 3 - B, 4 - A
Why can sound NOT be heard in outer space?
There are no particles to move the compressions along.
Which of these would produce a higher frequency and higher pitch on a guitar? (Choose three)
Tighten the strings Loosen the strings
Shorten the neck Lengthen the neck
Use thick strings Use thin strings
Tighten strings
Shorten neck
Thin strings
Name an animal that can hear higher frequencies that humans.
(Answers may vary)
What is the part of a sound wave where the particles are far apart?
Rarefaction
What are sounds called that are higher than we can hear and lower than we can hear?
Ultrasonic
Infrasonic
Which of these solids would sound travel fastest through, and why?
A. Diamond
B. Glass
C. Brick
D. Cotton Balls
A. Diamond - It is the hardest substance, so the particles are REALLY close together.
Which of these would produce a lower frequency and lower pitch on a woodwind? (Choose three)
Bigger size Smaller size
Shorter airway Longer airway
Slow vibrations Fast vibrations
Bigger size
Longer airway
Slow vibrations
Name an animal that can hear lower frequencies than humans.
Fill in each blank to make each statement true.
A. A lower amplitude means a ______ sound. (louder/softer)
B. More compressions means a ________ pitch. (higher/lower)
C. The colder the medium the _________ the sound wave moves. (faster/slower)
A - softer
B - higher
C - slower