Sound vocabulary
How sound travels
Frequency, pitch and wavelength
Amplitude and Loudness
Uses of sound energy
100

Sound travels in _________. 

Waves

100
The medium in which sound travels the fastest.
solid
100

What is the distance between two compressions called?

wavelength

100

What can you do to a guitar string to make the vibration have a larger amplitude?

pluck it more strongly

100

What is echolocation? 

Using an echo to locate an object or determine distance.

200

Two types of waves:  One where the molecules move in the same direction as the wave energy and one where the molecules move across from the direction of the wave energy.

Longitudinal and Transverse

200
The medium in which sound travels the slowest.
gas
200

The unit frequency is measured in

Hertz

200

What can you do to a guitar string to make the vibration have a smaller amplitude?

Pluck it more gently and softly

200

Sound is a form of ______.  (Hint:  other forms of this include electrical, potential and kinetic)

Energy

300
The back and forth movement of matter.
vibration
300
Why sound travels through a solid the fastest.
The molecules are closer together.
300
The number of waves in a given amount of time. For example, 200 waves per second.
Frequency
300

What units are used to measure loudness?

Decibels

300

When a siren in a moving police car passes by you hear the pitch change. This effect is called the _________. 

Doppler Effect

400
Part of the wave where molecules are very close together.
compression
400
Why sound travels the slowest in a gas.
The molecules are farther apart.
400

The musical word for high or low a sound is (NOT how loud or soft).

Pitch

400

How loud or soft a sound is determined by the _________ of the wave.

Amplitude
400

What technology invented by humans is similar to echolocation?  (Hint:  It is used to navigate submarines)

Sonar

500
Part of the wave where the molecules are spread out.
rarefaction
500

Does sound travel in a straight line like a laser, or outward in all directions?

Outward in all directions

500
Which frequency would have a higher pitch? A. 200 waves per second B. 500 waves per second C 1000 waves per second
C
500

Is there sound in the vacuum of space? Why or why not?

There is no sound in space, because in the absence of matter there are no molecules. There is no sound in a vacuum because there are no molecules to vibrate.

500

Name an animal that uses echolocation. 

bats, dolphins, etc. 

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