Light and Sound MTA Flashcards

Light and Sound Mid Topic Assessment

1
Q

How does increasing a sound waves amplitude effect the sound?

A

The volume increases.

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2
Q

What is Wavelength?

A

The length of one wave, from peak to peak or trough to trough.

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3
Q

What is frequency measured in (the units)?

A

Hz, Hertz

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4
Q

What will a wave with a high frequency sound like?

A

High pitched.

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5
Q

What will a wave with a low frequency sound like?

A

Low pitched.

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6
Q

What is it called when a sound wave gets reflected?

A

Echo

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7
Q

Why are Echo’s always quieter than the original noise?

A

Some of the sound waves energy is absorbed into the surface of the material that the wave is bouncing off.

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8
Q

What is echo location?

A

Using the time it takes an echo to be received to calculate the distance from a surface.

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9
Q

Through which state does sound travel fastest?

A

Solid.

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10
Q

Why does sound travel faster in water than in air?

A

The particles in water are closer together so it takes less time for each particle to transfer its energy to the next one.

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11
Q

Name the 2 types of wave.

A

Transverse, Longitudinal

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12
Q

In what direction do the particles oscillate in a transverse wave?

A

At 90 degrees to direction of the wave.

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13
Q

In what direction do the particles oscillate in a Longitudinal wave?

A

Parallel to the direction of the wave.

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14
Q

What type of wave is a sound wave?

A

Longitudinal

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15
Q

What causes a sound wave?

A

A vibration

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16
Q

Why cant a sound wave travel through a vacuum?

A

There are no particles to transfer the energy.

17
Q

What do all waves transfer?

A

Energy

18
Q

What is the speed of sound in air?

A

340 m/s

19
Q

Why do you see the flash of a firework before you hear the BANG!?

A

Light travels much faster then sound.

20
Q

Which part of the ear moves first when receiving a sound wave.

A

The ear drum.

21
Q

What is an echo?

A

A reflected sound wave.

22
Q

What is ultra sonic?

A

A sound with a frequency above 20 000 Hz

23
Q

What equation can you use to find the distance a sound wave has travelled?

A

Speed (m/s) = Distance (m) / Time (s)

24
Q

Describe a low pitched loud sound wave.

A

A wave that has a large amplitude and a low frequency.

25
Q

Describe a high pitched quiet sound wave.

A

A wave that has a low amplitude and a high frequency.

26
Q

What is the name of this part of the ear?

A

Auditory canal

27
Q

What is the nam of this part of the ear?

A

Ear Drum

28
Q

What is the name of this part of the ear?

A

Ossicles

29
Q

What is the name of this part of the ear?

A

Semi-Circular Canals

30
Q

What is the name of this part of the ear?

A

Cochlea

31
Q

What is the name of this part of the ear?

A

Auditory nerve

32
Q

What is the range of human hearing?

A

20 to 20000 Hz

33
Q

What is a medical use of ultrasound?

A

Taking images of unborn babies

34
Q

Name one animal that uses ultrasound to catch its food

A

bat

35
Q

What is ‘loudness’ measured in?

A

Decibels