Waves and sound Flashcards

1
Q

What are waves?

A

Waves are transferring energy from 1place to another and the movement of particles

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2
Q

What are 2 types of waves?

A

Transversal and Longitudinal waves

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3
Q

In longitudinal waves , the vibrations are __________________.

A

Parallel to the direction of energy transfer of the waves

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4
Q

In transversal waves , the vibrations are ____________________.

A

Perpendicular to the direction of energy transfer of the waves

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5
Q

What are the movement of the particles?

A

Vibrations and oscillation

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6
Q

What do waves need to be formed ?

A

They need particles to be formed . They need a medium

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7
Q

What’s a trough?

A

The lowest point of transverse waves

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8
Q

What’s a crest/peak?

A

The highest point of transverse waves

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9
Q

What’s an amplitude?

A

The distance between the resting point and the peak / trough

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10
Q

What’s the wavelength?

A

The distance between 2 similar points

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11
Q

What does compression in a wave mean?

A

Particles are closer to each other

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12
Q

What does refraction in a wave mean?

A

Area of waves where the particle is

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13
Q

What does frequency in a wave mean?

A

Number of waves passing through a point in one second ( higher wave point = lower frequency)

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14
Q

Energy is transferred by ____ particles . Sound waves transfer _____ from source to detector through a ______ . Waves transfer energy without transferring ___ particles do not travel from the source to detector . The vibrating particles move ________ and ________.

A

Air , Energy , Medium , Air , Backwards , Forwards

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15
Q

Sound can travel at different ______ depending on the ______ it is travelling through , Sound travels faster in a _____ than it does in a ___ or ______ , This is because the particles in a solid are ______ than they are in a gas.

A

Speeds , Medium , Solid , Gas , Liquid , Closer

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16
Q

Speed=

A

Distance/Time

17
Q

What is an ultrasound?

A

Soundwaves beyond the limit of a human hearing which is 20hz - 20,000 hz

18
Q

How do our ear help us hear?

A

Sound travels in waves . Sound waves are carried by vibrating air particles . The soundwaves cause the ear drums to vibrate . The vibrating ear drums make the ear-bones move like levers . This movement is transferred to liquid which moves hairs in the cochlea . The auditory nerve carries the electrical message to the brain.

19
Q

What is an echo?

A

When a sound is reflected but louder