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Investigative Physical Science > Chapter 6 > Flashcards

Chapter 6 Flashcards

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Biology 101 flashcards
1
Q

the form of energy detected by our ears

A

sound

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2
Q

sound is carried by

A

waves

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3
Q

sounds needs a

A

medium

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4
Q

speed of sound depends on these two things

A

temperature and density of the medium

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5
Q

sound travels at _____ in air

A

338 m/s

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6
Q

sound travels at _____ in water

A

1500 m/s

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7
Q

sound travels at _____ in wood

A

3850 m/s

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8
Q

sound travels at _____ in iron

A

5955 m/s

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9
Q

speed and temperature have a ______ relationship

A

Direct

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10
Q

speed and density have a ______ relationship

A

direct

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11
Q

pitch and frequency have a ______ relationship

A

direct

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12
Q

pitch is

A

how high or low a tone sounds to our ears

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13
Q

frequency is

A

the amount of cycles per second of the sound wave

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14
Q

frequency is measured in

A

Hertz (Hz)

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15
Q

young children can hear from

A

20 to 20000 Hertz

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16
Q

as we age our eardrums become less elastic and the ____ is reduced

A

upper limit of frequency

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17
Q

wavelength and frequency have a ______ relationship

A

indirect

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18
Q

waves that are too low for us to hear are called

A

infrasonic waves

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19
Q

waves that are too high for us to hear are called

A

ultrasonic waves

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20
Q

the response of your ear to the intensity of a sound wave is called

A

loudness

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21
Q

loudness is measured in

A

decibels

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22
Q

the threshold of hearing is

A

0 decibels

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23
Q

normal conversation is

A

60 decibels

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24
Q

the threshold of pain is

A

120 decibels

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25
Q

loudness and amplitude have a ______ relationship

A

Direct

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26
Q

amplitude is

A

the height of a wave

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27
Q

determines the note people hear

A

fundamental tone

28
Q

shorter faster vibrations accompanying the fundamental tone

A

overtones

29
Q

the effect on sound is called

A

acoustics

30
Q

the transfer of energy from one object to another object that the same natural frequency is called

A

resonance

31
Q

the Doppler effect is

A

would the pitch of a sound reaching your ear varies if you are the source of the sound are In Motion

32
Q

sonar stands for

A

sound navigation and ranging

33
Q

sonar uses

A

sound waves traveling through water to locate underwater materials and they are reflected if they hit a solid

34
Q

ultrasounds are

A

low intensity impulse waves that can be sent into the body and Echoes detected are used to draw an image. these have no harmful effects.

35
Q

electromagnetic waves are

A

energy and waveform that is capable of traveling through a vacuum

36
Q

the highest point of a wave is called

A

the crest

37
Q

the lowest point of a wave is called

A

the trough

38
Q

the distance from one Crest to next is called the

A

wavelength

39
Q

all electromagnetic waves travel at the speed of

A

light

40
Q

light is a _____ wave

A

light

41
Q

sound is a ____ wave

A

mechanical

42
Q

sound cannot travel through

A

a vacuum

43
Q

the three additive primary colors of light are

A

red blue and green

44
Q

the three primary pigment colors also known as the subtractive primary colors are

A

yellow magenta and cyan

45
Q

a pigment is

A

a colorful material that is used to change the color of other substances

46
Q

luminous objects ____ light waves

A

emit

47
Q

illuminated objects ______ light waves

A

reflect

48
Q

speed of light and density of the medium have a ______ relationship

A

indirect

49
Q

the distance light travels in a year is called

A

a light year

50
Q

intensity is

A

a measure of how bright a light from the light source is

51
Q

intensity is measured in

A

Candelas (cd)

52
Q

illumination and intensity have a ______ relationship

A

direct

53
Q

illumination and distance from the source have a ______ relationship

A

indirect

54
Q

light travels in

A

straight lines

55
Q

Ray Optics is

A

the study of movement of light in straight lines

56
Q

an incident Ray is

A

an incoming ray

57
Q

a reflected ray is

A

an outgoing ray

58
Q

a normal Ray is

A

a line drawn perpendicular to the surface at the point at which Rays strike and is used for measuring angles

59
Q

angle of incidence

A

angle between normal and incident Ray

60
Q

angle of reflection

A

angle between normal and reflected ray

61
Q

Law of Reflection

A

the angle of incidence is equal to the angle of reflection

62
Q

concave mirrors

A

are upside down or inverted images that are the real images because light rays actually passed through the image. These are used in reflecting telescopes flashlights spotlights and auto headlights

63
Q

Refraction is

A

the bending of light as it enters a new medium

64
Q

lenses use the property of reflected light

A

magnify or reduce images

65
Q

the separation of white light into its differently coloured light waves is called

A

dispersion

66
Q

raindrops act as ____ to make rainbows using ______

A

concave mirrors

dispersion

Investigative Physical Science (10 decks)

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