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Physical Science > Waves > Flashcards

Waves Flashcards

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1
Q

what type of wave is a sound wave

A

longitudinal

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2
Q

How is height measured in a transverse wave

A

from middle to top or middle to bottom

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3
Q

Does sound travel fastest in warm or cold air

A

warm air

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4
Q

what does sound travel fastest in

A

solids, liquids, warm gas, cold gas

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5
Q

Refraction occurs when a wave changes _____ as it passes through a different medium

A

speed

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6
Q

Houses with carpet are much quieter than houses with tile or hardwood floors because the sound waves

A

are absorbed

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7
Q

Increasing the amplitude of a sound wave will make it

A

get louder

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8
Q

what does amplitude measure

A

energy

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9
Q

when an ambulance with its siren on is moving AWAY from you, the wavelength gets ___ and the pitch of the sound gets ____

A

longer, lower

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10
Q

In order for reflection to occur the wave must ___ an object

A

bounce off

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11
Q

Light waves travell fastest in a ___

A

vaccum

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12
Q

X-rays, UVwaves, and sound waves all have what in common

A

transmit energy

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13
Q

If the angle of incidence shown is 30 degrees, the angle of reflection is___

A

30 degrees

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14
Q

Refraction occurs when a wave changes its___

A

speed

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15
Q

An echo is an example of a sound wave because of

A

relection

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16
Q

the angle of incidence of a wave is always equal to the angle of____

A

reflection

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17
Q

The po9int between vibrations in a standing wave is a

A

node

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18
Q

What is interference

A

when 2 or more waves overlap and combine to form a new wave

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19
Q

the amount of time it takes 1 wavelength to pass a point

A

period

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20
Q

what does T mean

A

period

21
Q

what is frequency

A

the number of waves that pass by a certain point in 1 second

22
Q

frequency and wavelength have what type of relationship

A

inverse

23
Q

what is Sound an example of and why

A

mechanical wave and longitudinal
because mechanical waves have to travel through a medium

24
Q

what is electromagnetic and why

A

light waves/transverse waves.
becuase it does not need a medium to travel through
like you can see light in space but you can not hear sounds in space.

25
Q

A measure of how long the waves is, taken from one wave to the same point on the next wave.

A

wavelength

26
Q

what is loudness?

A

the human perception of intensity

27
Q

A term related to frequency that increases as frequency increases

A

pitch

28
Q

what is refraciton

A

the bending of waves causes by a change in their speed as they move from one medium to another
Ex-
like fish in water when it is distorted

29
Q

when an object causes a wave to change direction and bend around it

A

diffraction

30
Q

What are tuning forks an example of? Explain

A

Resonance. process where an object is made to vibrate at it’s NATURAL FREQUENCY

31
Q

In what way does matter move in a longitudinal wave

A

paralell

32
Q

In what way does matter move in a transverse wave

A

perpendicular

33
Q

Order the electromagnetic spectrum
Longest wavelength/smallest frequency- Smallest wavelength/highest frequency

A

Radio Waves, Microwave, infrared, visible light, ultraviolet, x-ray, gamma ray

34
Q

electromagnetic waves can behave as waves and ____; called photons

A

particles

35
Q

what do radio waves do?

A

MRI’s, WIFI, RADAR, cell phones

36
Q

what do microwaves do?

A

Cooking, doppler radar and Gps

37
Q

What is used in night vision goggles and remotes

A

infrared

38
Q

what is visible light?

A

the only EM waves we can see. ROYGBIV

39
Q

What is used to kill bacteria and what else can it do?

A

ultraviolet(UV) waves. it can also be used in lightbulbs and is used in the human body to make vitiman D

40
Q

what is bad for humans if we use too much of it

A

UV

41
Q

what do X-rays do?

A

Take pictures of bones. small enough to penetrate skin. Overexposed can cause cancer

42
Q

Gamma Rays. Explain

A

used to kill cancer cells, sterilize materials, and radioactive tracers, make big bombs and kill all kinds of cells

43
Q

what is the doppler effect?

A

Change in frequency and pitch due to a moving wave source.

44
Q

what are rods?

A

like night vision, used in low levels of light

45
Q

what are cones?

A

used to see in the day time. bright light levels. used to see colors

46
Q

Concave lenses?

A

nearsighted (to help you see closer)

47
Q

Convex lenses?

A

Farsighted ( to help you see far away)

48
Q

mechanical waves___

A

disturb matter

49
Q

what is UV produced by?

A

stars and galaxies

Physical Science (4 decks)

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