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Gr. 4 Science > Light & Sound > Flashcards

Light & Sound Flashcards

1
Q

What’s an example of refracted light?

A

A rainbow.

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2
Q

Give an example of a transparent object.

A

A transparent object would be glass or plastic. Light can go through transparent objects clearly.

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2
Q

What is an example of artificial light?

A

A light bulb.

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2
Q

What is the definition of pitch?

A

Pitch is the lowness or highness of a sound.

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2
Q

What is the loudness of sound measured by?
A. Decimals
B. Doughnuts
C. Decibals (dB)

A

C. Decibels (dB)

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3
Q

What direction does light travel in?

A

A straight line.

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6
Q

Give an example of a translucent object.

A

A translucent object would be paper, or a leaf. Some light can still be seen through these objects.

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6
Q

What is the definition of refraction?

A

Refraction happens when light bends or changes its angle as it passes from one material to another.

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7
Q

What is an animal that uses echolocation to locate something?

A

Bats, or whale species.

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8
Q

Does the moon reflect or emit its own light?

A

The moon reflects the suns’ light

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10
Q

What is an example of natural light?

A

The sun, or lightning.

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11
Q

Give an example of an opaque object.

A

An opaque object would be a black curtain. No light can pass through opaque objects.

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12
Q

Why do we see lightning before we hear thunder?
A. Our eyes are in front of our ears.
B. Light travels faster, so it will reach us before sound does.

A

B. Light travels faster, so it will reach us before sound does.

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13
Q

What is definition of vibration?

A

A quick back and forth motion.

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14
Q

The colour black ___________ light.
A. Reflects
B. Absorbs
C. Emits

A

B. Absorbs

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15
Q

True or false: sound cannot pass through solids and liquids.

A

False. Sound can travel through solids and liquids where there is air.

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16
Q

What’s the definition of absorb? (To do with light).

A

Absorb means to take in (light).

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17
Q

What makes an orange (the fruit) the colour orange?

A

When light hits the orange, it absorbs all the colours except orange, which is reflected.

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18
Q

What’s something that emits its own light?

A

The sun or car lights.

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20
Q

What’s something that reflects light?

A

A safety reflector on a bike or vest.

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21
Q

What is an example of a material that absorbs sound?

A

A carpet

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22
Q

What is an example of a material that reflects sound?

A

A smooth surface like a mirror.

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23
Q

What is the definition of reflection? (To do with light)

A

Reflection happens when light bounces off an object instead of being soaked up.

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24
Q

True or false: when an object vibrates quickly it makes a low-pitched sound.

A

False. When an object vibrates quickly it makes a high-pitched sound.

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25
Q

The colour white ____________ light.
A. Absorbs
B. Emits
C. Reflects

A

C. Reflects

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26
Q

What type of material is a pencil?
A. Opaque
B. Transluscent
C. Transparent

A

A. Opaque

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27
Q

when you put a pencil in water it is A.reflection B.refraction

A

B.refraction

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28
Q

True or false: you can hear in space

A

false: you can not hear in space without a earbud

there is no air in space, therefore, there is nowhere for sound waves to travel!

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29
Q

when you put a pencil in water A.reflection B.refraction

A

B.refraction

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30
Q

What does ROYGBIV stand for?

A

Red orange yellow green blue indigo violet

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31
Q

What does black light do?
A.reflect
B.absorb

A

B.absorb

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32
Q

Can you clean stuff with sound?

A

Yes

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33
Q

What does yellow light do on a yellow rubber ducky?
A. it is absorbed into the yellow ducky and we don’t see any colour; or B. it reflects off the yellow ducky and we see yellow

A

B. reflects off so we see yellow!

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34
Q

When sunlight shine’s on to a blue surface what do you see
A. Yellow
B. Violet
C. Blue

A

C. Blue because it reflects blue.

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35
Q

why do we see lightning before we hear thunder?

A

Light travels faster than sound

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36
Q

CAN LIGHT change direction

A

yes when it reflects off a smooth surface (like a mirror)

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37
Q

What is a hypothesis?

A

An informed guess

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38
Q

What does modify mean?

A

Change

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39
Q

Which is hotter-lightning or the surface of the sun?

A

Lightning because it can get as hot as 28 000 degrees Celcius!

40
Q

Which material ABSORBS red?
A. A red curtain
B. A purple rug
C. A red rose

A

B. A purple rug absorbs the colour red and reflects the colour purple only - that is why we see purple!

41
Q

since sunlight appears to have no colours,we call it _____ light
A.blue
B.orange
C.white

A

C.)White light

42
Q

Why can you hear an airplane over there but it’s really above you?

A

Because airplanes are too fast for sound

43
Q

Can you make a telephone with cups and a

Long thin, string-like object?

A

Yes you can (i.e. our telephone cup experiment)

44
Q

Sound needs to be ——- kHz to———- kHz to clean objects
A.123 199
B.150 400
C.200 600

A

B.150 400

45
Q

What is the material of a mirror
A) opaque
B)translucent
C)transparent

A

A)opaque

46
Q

What does absorb mean

A

Take in (light)

47
Q

What does echo mean

A

It means to hit a object and come back

48
Q

When didn’t the ribbon work (with the telephone cup experiment?)

A

When the ribbon was loose/limp - Because it couldn’t hold the vibration of the sound passing through.

49
Q

why do we see lightning before we here thunder

A

thunder is the sound that lightning makes - lightning travels faster than the sound of thunder.

50
Q

What does refraction mean
A.happens when light bends or changes its angle as it passes from one material to another.
B.light travels in a straight line

A

A.happens when light bends or changes its angle as it passes from one material to another. (i.e. a rainbow!)

51
Q

name two animals that use echolocation

A

bats and whales

52
Q

What material is sunglasses
A) transparent
B)opaque
C)translucent

A

A) transparent

53
Q

What does excessive mean?

A

Too much (i.e. excessive light or excessive sound can be dangerous)

54
Q

What does sunglass protect you from
A. Excessive light
B. Excessive sound

A

A. Excessive light

55
Q

The outer ear is made up of three things the ________ the ________ and the__________.
A. outer; middle; inner nerves
B. three tiny bones; cochlea; ear drum
C. earflap; ear canal; eardrum

A

C. earflap; ear canal; eardrum

56
Q

How does echolocation work?

A

Using sound to orient or locate.

57
Q

Light travels in a straight line but when it passes through another medium such as water it may bend and change direction this is called

A

Refraction

58
Q

What is more decibels (dB) vacuum or a shout

A

Shout

59
Q

What is the highest decibels (dB)? (Think of the chart with the whisper, jackhammer, etc.)

A

Airplane taking off (130 dB)

60
Q

in water why does fish look so deep when u look down

A

it is refraction

61
Q

Harold wants a material to cover his whole car to protect it from the sun. What would he use?

  1. plastic
  2. sheets
  3. string
A

2.sheets is the answer.

62
Q

What is louder a quiet street or a whisper

A

a quiet street

63
Q

What does reflect mean?

A

Bounce back

64
Q

Can sound travel through solids?

A

yes it can

65
Q

When sunlight shines on a white surface we see

A

White

66
Q

A guy is really curious about what WHITE blinds in a window do to light. Do they:
A. Absorb light
B. Reflect light
C. Refract light

A

B. White blinds would reflect light.

67
Q

Does a parrot speak in low or high decibles?

A

High decibles

68
Q

A.)light that occurs in nature is;______light. e.g.: ________
B.)light that is created by people and does not occur naturally is________light. e.g;__________

A

a) natural light. e.g.: sun/lightning

b) artifical light. e.g.: lamp

69
Q

When DID the ribbon work (in the telephone cup experiment)? Why?

A

The ribbon worked when it was pulled tight so that the sound waves could travel through it.

70
Q

True or false: When an object vibrates slowly, it makes a high-pitched sound.

A

False. When an object vibrates slowly, it makes a low-pitched sound. (Remember - “Slow & Low; Quick & High”)

71
Q

Traffic signs are an example of what?
A. Emitting light
B. Producing light
C. Reflecting light

A

C. Reflecting light

72
Q

Name something that protects ears from excessive sound. (Excessive = too much).

A

Ear muffs

73
Q

Name an artificial source of light.

A

A lamp.

74
Q

Name an instrument that makes a HIGH-pitched sound.

A

A flute or a penny whistle

75
Q

Name an instrument that makes a LOW-pitched sound.

A

A tuba or a drum

76
Q

Name the item in the list that is NOT a property of light:

a. light travels in straight lines
b. light can be refracted
c. light can be evaporated

A

c. light can be evaporated (this is NOT a property of light)

77
Q

What property of light is demonstrated when a light shines on a black surface?

A

Light being absorbed is the property of light that is shown.

78
Q

What property of light is demonstrated when water distorts an object in it? (i.e. a spoon in a cup of water).

A

Refraction is the property of light that is shown.

79
Q

What is the amalgamation of light and sound called?

A

JUST KIDDING! This is Mrs. Salverda keeping you on your toes! CLICK 5 & move on! :D

80
Q

Finish this sentence that Mrs. Salverda taught us:
“Slow and low, quick and ________.”
(Think about the actions we did for remembering vibrations and pitch).

A

high!

81
Q

What property of sound is demonstrated by Mrs. Salverda’s guitar and ukelele strings?

A

Pitch (i.e. different sized guitar strings make different kinds of vibrations and therefore, different pitch levels, or sound!)

82
Q

What property of sound does the red mirror demonstrate when we put is on the end of the wrapping paper tubes and listened to the ticking timer?

A

The red mirror demonstrates sound being reflected.

83
Q

Put the following parts of the ear in order of how sound enters: auditory nerve (to the brain), ear drum, cochlea
1. __________ 2. ___________ 3. ___________

A
  1. ear drum
  2. cochlea
  3. auditory nerve (to the brain)
84
Q

Why is a rainbow colourful?

A

White light from the sun REFRACTS off small rain droplets in the sky, causing the light to bend and show its colours.

85
Q

What colours are actually in “The Dress?”

A

FREE-BEE! Blue & Black!! ;-) Click 5 and move on! (Even if you saw White & Gold!)

86
Q

Can sound go on to a vibration with a tuning fork to a desk to make a new/louder sound? (Hint: think about the experiment with Mr. Salverda)

A

Yes - the sound vibrations travel from the tuning fork into a sounding board (like a hollow desk, or an empty cup).

87
Q

Describe what this part of the ear does: the Pinna

A

The Pinna collects sounds like a funnel.

88
Q

Describe what this part of the ear does: Ear Canal

A

The Ear Canal carries sound to the ear drum. It also produces ear wax.

89
Q

Describe what this part of the ear does: The Eardrum

A

The Eardrum vibrates with sound waves, and carries the sound to the three tiny bones.

90
Q

Describe what this part of the ear does: The Cochlea

A

The Cochlea changes vibrations into signals.

91
Q

Describe what this part of the ear does: Nerves

A

Nerves carry sound signals to the brain.

92
Q

What does sunscreen protect you from?
A.too much sound
B.too much sun

A

B.too much sun

93
Q

What do earplugs protect you from?
A.too much sound
B.to much sun

A

A.too much sound

94
Q

what part is the Eardrum from A.outer ear B.middle or C.inner ear

A

B.middle ear

95
Q

a glass cup is
A. opaqe
B. transluscent
C. transparent

A

C.tranparent

Gr. 4 Science (3 decks)

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