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Science > Sound Yr8 > Flashcards

Sound Yr8 Flashcards

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1
Q

Pitch

A

How high or low a note sounds

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2
Q

Sound waves

A

Sound energy carried from one place to another in the form of waves.

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3
Q

Vibrate

A

Moving backwards and forwards

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4
Q

Microphone -

A

A device that detects sound. It converts sound energy into electrical energy.

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5
Q

Amplitude

A

Height of a wave

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6
Q

Wave length -

A

Length of one wave

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7
Q

Frequency -

A

How many waves per second

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8
Q

What does the amplitude show?

A

The volume

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9
Q

What does the frequency of a wave show?

A

How high or low a pitch is.

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10
Q

If the amplitude of a wave increases…..

A

….the volume becomes louder.

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11
Q

If the amplitude decreases………

A

…the volume becomes quieter.

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12
Q

If the frequency increases…

A

…the pitch because higher.

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13
Q

If the frequency decreases…

A

The pitch would become lower.

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14
Q

Is the crest in a wave at the top or bottom?

A

Top of a sound wave

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15
Q

Is the trough at the top or bottom of a wave?

A

The bottom of a sound wave.

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16
Q

How do sound waves travel?

A

Through particles.

17
Q

What will sound travel through?

A

All the mediums: Gases, solids and liquids.

18
Q

A vacuum doesn’t have particles so will sound travel through it?

A

No, because ….

19
Q

What is the frequency measured in?

A

Hertz (Hz)

20
Q

Will sound travel quickest through a solid or a gas?

A

Solid, because …

21
Q

What is ultra sound?

A

Above 20,000 Hz
Humans can’t hear it because it is above our audible range
Dolphins and bats.

22
Q

What is infra sound?

A

Below 20 Hz
Human as can’t hear it, it is beyond our audible range.
Elephants and moles.

23
Q

Sound waves hit the…

A

Eardrum

24
Q

Vibrations of the _______ pass onto tiny bones called…

A

..Ossicles in the middle of the ear.

25
Q

These _________ transmit the vibrations to the ….

A

…cochlea in the inner ear.

26
Q

Tiny hair cells in the ____________ help transmit sound signals through the ….

A

Auditory nerve to the brain.

27
Q

Key word : intensity?

A

The loudness of a sound

Science (6 decks)

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