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8th Grade Science > Waves, Sound, and Light > Flashcards

Waves, Sound, and Light Flashcards

1
Q

Wave

A

A disturbance that transfers energy from place to place

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2
Q

Energy

A

The ability to do work

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3
Q

Medium

A

The material a wave travels through

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4
Q

Mechanical Waves

A

Waves that require a medium to travel through

Produced when a source of energy causes a medium to vibrate

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5
Q

Transverse Waves

A

Waves that move through the medium at right angles to the direction the wave is traveling

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6
Q

Trough

A

The low part of a transverse wave

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7
Q

Crest

A

The high part of a transverse wave

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8
Q

Longitudinal Wave (Compressional Wave)

A

Waves that move the medium parallel to the direction the wave is traveling

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9
Q

Compression

A

Part of a longitudinal wave where the waves are close together

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10
Q

Rarefaction

A

Part of a longitudinal was where the waves are spread out

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11
Q

Amplitude

A

The maximum distance that the particles of the medium carrying the wave move away from their rest position

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12
Q

Wavelength

A

The distance between two corresponding parts of a wave

Ex: crest to crest, trough to trough

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13
Q

Frequency

A

The number of complete waves that pass a given point in a certain amount of time

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14
Q

Hertz (Hz)

A

The unit of frequency

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15
Q

Reflection

A

The bouncing back of an object or wave when it hits a surface it cannot pass through

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16
Q

Refraction

A

The bending of waves as they enter a new medium at an angle

17
Q

Diffraction

A

The bending of waves as they move around a barrier or pass through an opening

18
Q

Sound Waves

A

A disturbance that travels through a medium as longitudinal (compressional) waves

19
Q

Intensity

A

Loudness of Sound

The amount of energy that a wave carries past a certain area

20
Q

Pitch

A

Human perception of the frequency of sound

21
Q

Electromagnetic Waves

A

A transverse wave that transfers electrical and magnetic energy

Can travel through empty space as well as through mediums

8th Grade Science (3 decks)

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