Sound Of Silence

Question 1

What form of wave is sound carried by?

Answer 1

Compression Wave (Longitudinal)

Question 2

How is sound created?

Answer 2

Vibrations

Question 3

The Louder the sound, The bigger the____

Answer 3

Amplitude

Question 4

Vibrations per second is called____

Answer 4

Frequency

Question 5

What is the unit for Frequency?

Answer 5

Hertz (Hz)

Question 6

Pitch is determined by____

Answer 6

Frequency

Question 7

High Pitch, High Frequency =

Answer 7

Short Wave Length

Question 8

Low Pitch, Low Frequency =

Answer 8

Long Wave Length

Question 9

Sound Energy is carried by compression waves and so relies on the ______________ in a medium

Answer 9

Collision of neighbouring Particles

Question 10

If Particles are more tightly packed (Solids or Liquids)_________

Answer 10

Sound waves travel faster

Because particles have less distance to travel to collide

Question 11

Why does sound travel faster in warm air?

Answer 11

Particles in Oxygen and Nitrogen have more kinetic energy and move quicker.

Question 12

List all 10 structures within the ear

Answer 12

1. Semicircular Canals
2. Middle ear
3. Auricle
4. Outer Ear
5. Ear (auditory) canal
6. Inner Ear
7. Auditory Nerve
8. Eustachian tube
9. Eardrum
10. Cochlea

Question 13

Semicircular Canals

Answer 13

These 3 tubes control your sense of balance and tell you whether you are up, down or on your side

Question 14

Middle Ear

Answer 14

Contains the Ossicles (3 smallest bones in the body), These amplify vibrations from the ear drum

Question 15

Auricle

Answer 15

Outside part of the ear

Question 16

Outer Ear

Answer 16

Collects the energy from the vibrating air and funnels it along to the eardrum, making it vibrate

Question 17

Inner Ear

Answer 17

Contains the Cochlea, turns vibrations into electrical energy and sends them to the brain

Question 18

Cochlea

Answer 18

Lined with millions of tiny hairs, each connected to a nerve receptor, when fluid in inner ear vibrates, hairs move and receptors change the vibration into electrical energy.

Question 19

Auditory Nerve

Answer 19

Small nerves from receptors in Cochlea merge to for this large nerve that sends signals to the brain

Question 20

Eustachain tube

Answer 20

This tube joins the middle ear to the nose and throat. When air pressure on the eardrum is not even on both sides the tubes open to balance the pressure

Question 21

Ear Drum

Answer 21

Pressure from sound waves make the eardrum vibrate

Question 22

How is sound used in Industry?

Answer 22

Ultra sound is used to produce images of under water (sound is reflected back off of surfaces), same concept applies to unborn babies

Question 23

How is sound utilised by animals

Answer 23

Dolphins send out high frequency sounds that are reflected back when they hit a target, indicating size and shape

Question 24

Ultrasound

Answer 24

Sounds that have a frequency that humans cannot hear