Sound

Question 1

How do we hear things?

Answer 1

Vibrations travel through the ear and send messages to the brain

Question 2

What are the two types of sound waves?

Answer 2

Transverse waves and longitudinal waves

Question 3

Sound travels fastest through what medium?

Answer 3

Solids and slowest through gases

Question 4

If a glass has a small amount of water in it and the glass is tapped, will the sound be higher or lower is pitch?

Answer 4

Higher

Question 5

Sound is seen through what waves?

Answer 5

Longitudinal waves

Question 6

What is frequency?

Answer 6

It’s how many waves pass through one spot per second.

Question 7

When you increase the pitch of a sound the frequency _____________ (increases or decreases)

Answer 7

Increases

Question 8

When we increase the loudness of the sound the ____________ increases.

Answer 8

Amplitude

Question 9

Sound travels at ____ meters per second through air and ______ meters per second through a solid.

Answer 9

A- 343. B-5000

Question 10

Sound travels at about ______ meters per second through water

Answer 10

1500

Question 11

How do u calculate the depth of water?

Answer 11

Halve the time it takes for the sonar signal to return. This gives the time it takes for the signal to reach the bottom or the fish.
Multiply this by the speed of sound in sea water ie (x1500)

Question 12

What is the vibrating source for speech?

Answer 12

Flaps of skin, called vocal cords

Question 13

What is the vibrating source for a drum?

Answer 13

Drum skin

Question 14

What is the vibrating source for a piano

Answer 14

String inside a piano-when you strike a key, the string is struck by a hammer

Question 15

What is the vibrating source for a bell ringing

Answer 15

Metal casing of the bell

Question 16

When air particles are bunched together this is called

Answer 16

Compressions

Question 17

When air particles are more spread out this is called

Answer 17

Rarefactions

Question 18

A sound wave is the movement of alternating….

Answer 18

Compressions and rarefactions

Question 19

What are the main parts of the ear?

Answer 19

Pinna
Eardrum
Ossicles
Oval window
Semicircular canals
Auditory nerve
Cochlea
Eustachinan tube

Question 20

What is the ear drum and what is its function?

Answer 20

Separates the outer and middle ear, tight skin that is spread across the ear. Sound reaches this and than vibrates.

Question 21

What is the pinna

Answer 21

The outa ear, it funnels sound into the ear Canal