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Physical Science > Waves > Flashcards

Waves Flashcards

1
Q

Wave

A

A disturbance that carries energy through matter and space

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2
Q

What needs to be done in order to create waves?

A

Must be a change made by adding energy to a system

  • the bigger the disturbance (energy) the bigger the wave
  • the farther the wave travels, the less intense
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3
Q

How do waves transfer energy?

A

Through a media, vibrates particles and transfers energy

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4
Q

Medium

A

Matter a wave travels through

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5
Q

Mechanical Waves

A

Waves that require a medium

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6
Q

Electromagnetic Waves

A

Waves that don’t require a medium/ A wave that can travel through empty space

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7
Q

Transverse Waves

A

A wave that causes particles of a medium to vibrate up & down, in the direction of the wave

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8
Q

Wave Length

A

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

  • The longer the wave length, lower energy, levels are less dangerous
  • the shorter the wave length, higher energy, levels are more dangerous
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9
Q

Amplitude

A

The height of a crest

  • Low amplitude, lower energy, less dangerous
  • High amplitude, higher energy, more dangerous
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10
Q

Longitudinal Waves

A

A wave that causes the particles of a medium to vibrate back & forth in the direction of the wave

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11
Q

Compression

A

Point on the wave where the particles are closer together

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12
Q

Rarefaction

A

Point on the wave where the particles are spread apart

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13
Q

What would compression be equal to on a wave?

A

The crest

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14
Q

What would the rarefaction be equal to on a wave?

A

The trough

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15
Q

What are the properties of waves?

A

Wave length and Frequency

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16
Q

Loudness

A

The human perception of intensity

17
Q

Pitch

A

A term related to the frequency and increases as frequency increases

18
Q

Doppler Effect

A

The motion between an observer and a moving object creates a change in frequency

19
Q

Frequency

A

Number of waves per second

20
Q

Constructive Interference

A

When 2 waves completely overlap producing a wave with a larger amplitude

21
Q

Destructive Interference

A

When 2 waves do not overlap producing a wave with a smaller amplitude

22
Q

Resonance

A

The vibrating back and forth of a wave

23
Q

Do loud sounds travel faster than soft sounds?

A

No, the only difference is the intensity

24
Q

Would sound travel in an oven or a freezer?

A

In an oven because the particles are moving faster

25
Q

Does the pitch of a sound affect its speed?

A

No, only the frequency changes

26
Q

Which doesn’t belong with the rest of the terms?:

Loudness, Pitch, Amplitude and Volume

A

Loudness is volume. You change volume by changing amplitude.

Pitch is related to frequency

27
Q

Would sound travel faster in a solid, liquid or gas?

A

Solid, particles are more compact/ closer together which means easy to transfer

28
Q

Which wave would travel the fastest in a vacuum, light or sound?

A

Light, doesn’t require a medium

29
Q

Radiation

A

The transfer of energy by electromagnetic waves

30
Q

Infrared radiation has a wavelength slightly longer than ____________.

A

Microwaves

31
Q

____________ radiation has a higher frequency than visible light

A

Ultraviolet

32
Q

Objects containing heat can emit ____________.

A

Infrared radiation

33
Q

______________ have the lowest energy

A

Radio waves

34
Q

Radio waves are radiation with very long _______________ and low frequencies.

A

Wave lengths

35
Q

____________ have the highest frequency of all electromagnetic waves.

A

Gamma rays

36
Q

Ozone in Earth’s atmosphere blocks most of the sun’s____________.

A

Infrared rays

37
Q

____________ are radio waves with the highest frequency and energy

A

Microwaves

38
Q

True or false: Gamma rays travel faster than visible light

A

False, same speed as light but frequency changes

Physical Science (9 decks)

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