Sound, Ear, Light, Eye

Question 1

Inner ear

Answer 1

The semicircular canal and cochlea, which for organs of balance and hearing

Question 2

Outer ear

Answer 2

Concentrates air vibrations on the eardrum to make the eardrum vibrate

Question 3

Middle ear

Answer 3

The air-filled central cavity of the ear, behind the eardrum

Question 4

Eardrum

Answer 4

A thin con-shape membrane that separates the external ear from the the middle

Question 5

Hertz (HZ)

Answer 5

The standard unit of frequency in the international system of units (is) equal to one cycle per second

Question 6

Wavelength

Answer 6

A distance between successive crests of a wave especially points in a sound wave or electromagnetic wave

Question 7

Amplitude

Answer 7

The maximum extent of a vibration or oscillation

Question 8

Volume

Answer 8

How loud or low a sound is

Question 9

Pitch

Answer 9

How high or low a sound is

Question 10

Vibrate

Answer 10

Move continuously and rapidly to and fro

Question 11

Auditory nerve

Answer 11

A bundle of nerve fibres that carries hearing information between the cochlea and the nerve

Question 12

Ear bones

Answer 12

Three bones that transmit sounds from the air to the cochlea. Thy are the smallest bones in our body

Question 13

Ear canal

Answer 13

A tube running from the outer ear to the middle ear

Question 14

Vacuum

Answer 14

A space entirely devoid of matter

Question 15

Longitudinal wave

Answer 15

A wave vibrating in the direction of propagation

Question 16

Transverse wave

Answer 16

A wave that the medium vibrates at a right angle to the direction of its propagation

Question 17

Oscilloscopes

Answer 17

An instrument used to analyze the wave form of electronic signals

Question 18

Frequency

Answer 18

The speed of the vibration that determines the pitch of the sound

Question 19

Cochlea

Answer 19

A portion of the inner ear that receives sound in the form of vibrations

Question 20

Particle

Answer 20

An extremely small piece of matter

Question 21

Sound

Answer 21

A form of energy that can be heard and travels in waves

Question 22

Light

Answer 22

A form of energy that travels in all directions from a source

Question 23

Light source

Answer 23

Something that emits light sun, bioluminescence, fire

Question 24

Importance of light

Answer 24

Solar power, seeing, growing, temperature, moisture

Question 25

Eye

Answer 25

Sense organ that detects light

Question 26

Pupil

Answer 26

The gap in the iris of the eye that lets light in

Question 27

Iris

Answer 27

The coloured part of an eye. Controls the diameter and the size of the pupil (amount of light)

Question 28

Retina

Answer 28

Detects light, and sends messages to the brain.

Question 29

Coloured filters

Answer 29

Filter is a transparent material that absorbs some colours and others through. Leigh ‘‘tis the only source of colour

Question 30

Dispersion

Answer 30

The splitting of white light into colour

Question 31

Properties of light

Answer 31

Reflection, refraction, dispersion, interference, diffraction, polarization, effects of materials on light, scattering of light

Question 32

Spectrum

Answer 32

The colour in white light; red, orange, yellow, green, violet, blue and indigo

Question 33

Lens

Answer 33

A pice if curved transparent material used to bend light

Question 34

Mirror

Answer 34

A surface, typically of glass coated with a metal amalgam, which reflects a clear image.

Question 35

Refraction

Answer 35

Bending of light when it travels from one material to another

Question 36

Reflection

Answer 36

The throwing back by a body or surface of light, heat or sound without absorbing it.

Question 37

Transparent

Answer 37

A material that allows light to pass through

Question 38

Translucent

Answer 38

A material that allows some light to pass through

Question 39

Opaque

Answer 39

A material that does not let light pass through

Question 40

Incident ray

Answer 40

A ray of light that strikes material

Question 41

Reflected ray

Answer 41

The ray that represents the light reflected by the surface

Question 42

Scattering

Answer 42

When light is reflected in many directions by a rough surface

Question 43

Inverted

Answer 43

Up side down

Question 44

Object

Answer 44

Something you look at using a mirror or lens to form an image

Question 45

Image

Answer 45

An object seen directly on a screen using a mirror or lens

Question 46

The normal

Answer 46

A line drawn perpendicular to the surface of a mirror from point where incident ray meets the surface of the mirror

Question 47

Short sightedness

Answer 47

Inability to see things clearly unless they are relatively close to the eye

Question 48

Long sightedness

Answer 48

Inability to see things far unless they are relatively close

Question 49

White light

Answer 49

A colourless light such as day light

Question 50

Speed of light

Answer 50

300 million m/s through air