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Science M2 > Sound, Ear, Light, Eye > Flashcards

Sound, Ear, Light, Eye Flashcards

1
Q

Inner ear

A

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

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2
Q

Outer ear

A

Concentrates air vibrations on the eardrum to make the eardrum vibrate

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3
Q

Middle ear

A

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

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4
Q

Eardrum

A

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

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5
Q

Hertz (HZ)

A

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

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6
Q

Wavelength

A

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

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7
Q

Amplitude

A

The maximum extent of a vibration or oscillation

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8
Q

Volume

A

How loud or low a sound is

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9
Q

Pitch

A

How high or low a sound is

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10
Q

Vibrate

A

Move continuously and rapidly to and fro

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11
Q

Auditory nerve

A

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

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12
Q

Ear bones

A

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

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13
Q

Ear canal

A

A tube running from the outer ear to the middle ear

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14
Q

Vacuum

A

A space entirely devoid of matter

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15
Q

Longitudinal wave

A

A wave vibrating in the direction of propagation

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16
Q

Transverse wave

A

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

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17
Q

Oscilloscopes

A

An instrument used to analyze the wave form of electronic signals

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18
Q

Frequency

A

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

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19
Q

Cochlea

A

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

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20
Q

Particle

A

An extremely small piece of matter

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21
Q

Sound

A

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

22
Q

Light

A

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

23
Q

Light source

A

Something that emits light sun, bioluminescence, fire

24
Q

Importance of light

A

Solar power, seeing, growing, temperature, moisture

25
Q

Eye

A

Sense organ that detects light

26
Q

Pupil

A

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

27
Q

Iris

A

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

28
Q

Retina

A

Detects light, and sends messages to the brain.

29
Q

Coloured filters

A

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

30
Q

Dispersion

A

The splitting of white light into colour

31
Q

Properties of light

A

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

32
Q

Spectrum

A

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

33
Q

Lens

A

A pice if curved transparent material used to bend light

34
Q

Mirror

A

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

35
Q

Refraction

A

Bending of light when it travels from one material to another

36
Q

Reflection

A

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

37
Q

Transparent

A

A material that allows light to pass through

38
Q

Translucent

A

A material that allows some light to pass through

39
Q

Opaque

A

A material that does not let light pass through

40
Q

Incident ray

A

A ray of light that strikes material

41
Q

Reflected ray

A

The ray that represents the light reflected by the surface

42
Q

Scattering

A

When light is reflected in many directions by a rough surface

43
Q

Inverted

A

Up side down

44
Q

Object

A

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

45
Q

Image

A

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

46
Q

The normal

A

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

47
Q

Short sightedness

A

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

48
Q

Long sightedness

A

Inability to see things far unless they are relatively close

49
Q

White light

A

A colourless light such as day light

50
Q

Speed of light

A

300 million m/s through air

Science M2 (5 decks)

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