Senses2

Question 1

Frequency

Answer 1

Number of vibrations per second (hertz, Hz)

Question 2

Sound produced is caused

Answer 2

By vibration of object

Question 3

Correlation

Answer 3

Faster and object vibrates, higher frequency of sound produced, higher the pithc.

Question 4

How sound is transmitted

Answer 4

When object vibrates in air, it pushes on surrounding air particles and causes them to vibrate

Question 5

Sound medium

Answer 5

Solid, gas or liquid; transmitted through vibration of these medium’s particles.

Question 6

Why sounds travels faster in solids

Answer 6

Because particles are close together and can pass along vibrations quickly

Question 7

Why sound travels slowest in gas1

Answer 7

Because particles are far apart and pass along vibrations slowly

Question 8

Why no sound in vacuum

Answer 8

No air
No air particles
No vibration transmission

Question 9

Pinna

Answer 9

Funnel shape. Collect sound from surroundings, direct sound to ear canal

Question 10

Ear canal

Answer 10

Sound travels through to middle ear

Question 11

Eardrum

Answer 11

Thin membrane. Sound causes it to vibrate, vibration transmitted to ear bones

Question 12

Ear bones

Answer 12

Amplify the vibrations of eardrum, transmitted to inner ear

Question 13

Cochlea

Answer 13

Coiled structure. Sensory hair cells inside detects vibrations and send signals to brain.

Question 14

Auditory nerve

Answer 14

Signals from sensory hair cells are sent to brain via here.

Question 15

Ultrasound

Answer 15

Frequency above audible frequency range of humans

Question 16

Noise

Answer 16

Any sound that is unwanted and disturbing

Question 17

Sound level can be measured via

Answer 17

Loudness of sound, decibel dB and decibel meter

Question 18

dB harmful for hearing

Answer 18

> 85

Question 19

Prolonged exposure to noise

Answer 19

Mental stress, sleep disturbance and hearing loss

Question 20

Tinnitus is

Answer 20

A constant ringing in ears
Damaged sensory hair cells that sends confusing signals

Question 21

Brain acts as a coordinator. It…

Answer 21

It integrates and interprets signals received from different sense organs
And produces senses.
It then decides on what actions to take
And send signals to the muscles through nerves to make a response.

Question 22

Reaction time

Answer 22

The time between detecting a stimulus and making a response

Question 23

Nerve cells are

Answer 23

Long extensions that connect to each other.
Signals are sent from cell to cell through these extensions

Question 24

Cerebellum

Answer 24

Coordinates muscles to produce body movement
Maintains body balance

Question 25

Coordinates muscles to produce body movement Maintains body balance

Answer 25

Cerebellum

Question 26

Cerebrum

Answer 26

Integrates and interprets signals from sense organ Sends signals to muscle to make response Responsible for intelligence, memory and thinking

Question 27

Medulla

Answer 27

Controls basic life functions

Question 28

Why bells produce different sound

Answer 28

Frequency of vibration of the bells are different So they produce sound of different pitches.

Question 29

Musical box turns louder sound

Answer 29

The tune turns louder due to vibration of plastic board. Molecules of plastic board sets air particles into vibration as well.

Question 30

What are tuning forks classified as.

Answer 30

Acoustic resonator. Vibrating sound waves produced by one will create sympathetic resonance in nearby fork with same frequency.

Question 31

How is mass important in pitch?

Answer 31

Need more energy to set higher amount of molecules in motion. Slower vibration per second = lower frequency = lower pitch

Question 32

Tuning fork process

Answer 32

When tuning fork is struck, prongs begin to vibrate. Vibrating prongs cause surrounding air molecules to vibrate. Vibrations are transmitted through air from molecule to molecule. Until air molecules near your eardrum vibrate and, in turn, cause your eardrum to vibrate.