Topic 10 Sound Energy

Question 1

Vibrations

Answer 1

Back and forth movements repeated fast

Question 2

Compression

Answer 2

The process where a material is being pushed in to itself

Question 3

Rarefractions

Answer 3

In sound waves, the layers of air particles that are spread apart (between compressions)

Question 4

Sound waves

Answer 4

Vibrations of particles in the air

Question 5

Hertz

Answer 5

Unit of frequency it’s abbreviation is Hz. One hertz is equal to one vibration every second

Question 6

Pitch

Answer 6

The home ghmess or lowness of a sound. The pitch that you hear depends on the frequency of the vibrating air

Question 7

Frequency

Answer 7

Number of vibrations in one second, or the number of wavelengths passing in one second

Question 8

Wavelength

Answer 8

Distance between two neighbouring crests or troughs of a wave. This is the distance between two particles vibrating in step

Question 9

Amplitude

Answer 9

Maximum distance that a particle moves away from its undisturbed position

Question 10

Reverberation

Answer 10

Longer-lasting sound caused by repeated reflection from hard surfaces