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Science 8 > Science- Waves > Flashcards

Science- Waves Flashcards

(89 cards)

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1
Q

Energy

A

Capacity to apply a force over a distance

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2
Q

Force

A

A push/ pull on an object

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3
Q

Another name for rest position?

A

Equilibrium

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4
Q

Rest position

A

Level of the water when there are no waves

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5
Q

Crest

A

Highest point in a wave

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6
Q

Trough

A

Lowest point in a wave

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7
Q

Wavelength

A

The distance from crest to crest, trough to trough, one complete crest and one complete trough

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8
Q

Wavelength measured in?

A

Metres

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9
Q

Amplitude

A

Height of a wave crest or depth of a wave trough as measured from its rest position

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10
Q

Every cycle of bobbing up and down is called?

A

Oscillation or vibration

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11
Q

Frequency

A

Number of repetitive motions that occur in a given time

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12
Q

Frequency is measured in?

A

Hertz or cycles per sec

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13
Q

When one value increases as the other decreases, it’s called?

A

Inverse relationship

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14
Q

Medium

A

The matter the waves travel through

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15
Q

Transverse waves

A

Matter in medium move up and down perpendicular to direction wave travels

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16
Q

Compression waves

A

Matter in medium moves back and forth along the same direction that wave travels

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17
Q

Wave

A

Disturbance/ movement that transfers energy through matter or space without causing any permanent displacement

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18
Q

Frequency formula

A

f= # of cycles/ sec

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19
Q

Period formula

A

T= sec/ # of cycles

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20
Q

Model

A

Way of presenting something in order to understand it better and to make predictions

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21
Q

Wave model of light

A

Explanation of light behaviour -Pictures light travelling as a wave

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22
Q

Light

A

Type of wave that travels though empty space and transfers energy from one place to another

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23
Q

Visible light

A

Wave that you can see

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24
Q

Refraction

A

The bending or changing direction of a wave as it passes from one material to another

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25
Visible spectrum
The range of colours or frequencies of visible light
26
ROY G BIV
Red orange yellow green blue indigo violet
27
Colour with longest wavelength?
Red
28
Colour with shortest wavelength?
Violet
29
Is colour a property of visible light?
Yes.
30
White light
Result of mixing together all different colours of light
31
2 prism can do what?
Recombine the colours to form white light again
32
Reflection
Occurs when a light wave strikes an object and bounces off.
33
Reflected colours and absorbed colours
Reflected: can see Absorbed: can't see
34
What colours are needed to produce all the colours of the rainbow?
Red green blue
35
Additive primary colours
Red green blue
36
Secondary colour
2 additive colours combined | Yellow cyan magenta
37
Light is both?
Wave and particle | Particle called photons
38
Most important source of light on earth?
Sun
39
Where does the light go from the sun and other stars?
Spreads out(radiates) all directions
40
Radiant energy
Energy that travels by radiation
41
Sun also radiates?
Invisible energy
42
Light is classified as ?
Electromagnetic radiation
43
Electromagnetic spectrum
Represents different forms of electromagnetic radiation. -Visible light and all invisible forms of radiant energy
44
Electromagnetic radiation
Transmission of energy in the form of waves that extend from the longest radio waves to the shortest gamma rays
45
Radio waves
Type of electromagnetic radiation that have the longest wavelength and lowest energy and frequency compared to all other types
46
Microwaves and radar are a type of ?
Radio waves
47
Microwaves
Shortest wavelength and highest frequency of all radio waves
48
Radar
Remote sensing (shorter wavelength microwaves)
49
Radar is used for?
Tracking movement of automobiles, aircraft, watercraft, and spacecraft
50
Radar also used for?
Weather forecasting
51
Infrared waves
Type of electromagnetic radiation that has longer wavelength and lower energy and frequency
52
Infrared radiation is also called?
Heat radiation
53
Every object emits what?
Infrared waves bc all objects contain some heat source
54
Ultraviolet waves
Type of electromagnetic radiation that has a shorter wavelength and higher energy and frequency
55
Uv radiation helps your body?
Make vitamin D
56
Overexposure of Uv radiation can cause
Sunburns skin cancers damage to surface of the eye
57
Fluorescent materials
Absorbs uv waves and emit the energy as visible light
58
Another property of uv waves
Kill bacteria in food water and medical supplies
59
X rays
Type of electromagnetic radiation that have a much shorter wavelength and higher energy and frequency than uv waves
60
Who discovered x rays
Wilhelm roentgen German physicist 1895
61
Gamma rays
Highest energy and frequency and shortest wavelength portion of the electromagnetic spectrum
62
Gamma rays result from and produced?
Nuclear reactions | Produced by hottest regions if universe
63
Gamma rays
Used in radiation therapy to kill cancer cells
64
Most important source of light on earth?
Sun
65
Where does the light go from the sun and other stars?
Spreads out(radiates) all directions
66
Radiant energy
Energy that travels by radiation
67
Sun also radiates?
Invisible energy
68
Light is classified as ?
Electromagnetic radiation
69
Electromagnetic spectrum
Represents different forms of electromagnetic radiation. -Visible light and all invisible forms of radiant energy
70
Electromagnetic radiation
Transmission of energy in the form of waves that extend from the longest radio waves to the shortest gamma rays
71
Radio waves
Type of electromagnetic radiation that have the longest wavelength and lowest energy and frequency compared to all other types
72
Microwaves and radar are a type of ?
Radio waves
73
Microwaves
Shortest wavelength and highest frequency of all radio waves
74
Radar
Remote sensing (shorter wavelength microwaves)
75
Radar is used for?
Tracking movement of automobiles, aircraft, watercraft, and spacecraft
76
Radar also used for?
Weather forecasting
77
Infrared waves
Type of electromagnetic radiation that has longer wavelength and lower energy and frequency
78
Infrared radiation is also called?
Heat radiation
79
Every object emits what?
Infrared waves bc all objects contain some heat source
80
Ultraviolet waves
Type of electromagnetic radiation that has a shorter wavelength and higher energy and frequency
81
Uv radiation helps your body?
Make vitamin D
82
Overexposure of Uv radiation can cause
Sunburns skin cancers damage to surface of the eye
83
Fluorescent materials
Absorbs uv waves and emit the energy as visible light
84
Another property of uv waves
Kill bacteria in food water and medical supplies
85
X rays
Type of electromagnetic radiation that have a much shorter wavelength and higher energy and frequency than uv waves
86
Who discovered x rays
Wilhelm roentgen German physicist 1895
87
Gamma rays
Highest energy and frequency and shortest wavelength portion of the electromagnetic spectrum
88
Gamma rays result from and produced?
Nuclear reactions | Produced by hottest regions if universe
89
Gamma rays
Used in radiation therapy to kill cancer cells

Science 8 (9 decks)

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