Sound

Question 1

What does increasing the amplitude do to sound?

Answer 1

Makes it louder.

Question 2

What does increasing the frequency do to sound?

Answer 2

Higher pitch

Question 3

What type of wave is sound?

Answer 3

Longitudinal pressure wave

Question 4

Longitudinal waves…..

Answer 4

Have vibrations along the same line

Question 5

Can sound travel in space?

Answer 5

No. There are no particles. It needs a medium.

Question 6

Frequency is measured in….

Answer 6

Hertz (Hz)

Question 7

Does sound travel faster in solids, liquids or gases…and why?

Answer 7

Solids faster than liquids faster than gases.

Because solids are a denser medium - more particles in a small space.

Question 8

What is the frequency measured in Hertz?

Answer 8

The number of vibrations per second.

Question 9

What parts of the ear are involved in hearing?

Answer 9

Ear drum
Bones of middle ear
Inner ear: hairs on cochlea
Auditory nerve

Question 10

What is the auditory range of humans.

Answer 10

20 to 20,000 Hz

Question 11

What animals can hear much higher frequencies.

Answer 11

Dolphins, bats, dogs

Question 12

What is faster - light or sound?

Give an example how you know this.

Answer 12

Light

Thunder and lightning

Question 13

Can sound be reflected and absorbed.

Answer 13

Yes