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Science - Light and Sound > Sound > Flashcards

Sound Flashcards

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1
Q

Define echo

A

Reflected repetitions

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2
Q

Define Medium

A

Different speed that can change

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3
Q

Define Frequency

A

Number of vibrations per second

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4
Q

Define amplitude

A

size of vibrations

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5
Q

Define pitch

A

Is the highness and lowness

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6
Q

Define Wavelength

A

The length and of a wave

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7
Q

Define sound

A

A form of energy

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8
Q

Define volume

A

The loudness or softness of a sound

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9
Q

define eardrum

A

part of your ear that vibrates

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10
Q

define vocal cords

A

what makes you talk and what vibrates when you talk

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11
Q

Sound travels best through which medium?

A

Solids

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12
Q

Legends of the Native Americans say they put their ears to the ground to find out if horses were running nearby. Explain why this occurred?

A

You can hear a stampede faster through solids (ground) than through the air

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13
Q

Which medium does sound travel the fastest? Why does this happen?

A

Solids because the molecules are closer together

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14
Q

List the four ways that sound can be produced with examples of each.

A

Plucking - Guitars
Rubbing - Hands
Blowing - Clarinet
Striking - drums

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15
Q

Label the 4 parts of a light and sound wave

A

wavelength

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16
Q

True or False?

Sound occurs when something vibrates

A

True

17
Q

True or False?

Sound travels in waves

A

True

18
Q

An echo is caused when an object vibrates very fast

A

False

19
Q

Sound travels faster thru air than through steel

A

False - sound travels faster thru solid objects

20
Q

True or False?

Volume of sound depends on how strong the vibration is

A

true

21
Q

True or False?

The number of sound waves an object produces in a second is known as the pitch.

A

False

22
Q

True or False?

Volume is measured in units called hertz

A

False

23
Q

True or False?

An object that vibrates quickly has a high frequency and produces a low pitch.

A

False

24
Q

True or False?

Elephants can hear higher pitched sounds than humans.

A

True

25
Q

True or False?

The softer the sound, the lower the number of decibels.

A

True

26
Q

True or False?

A diver underwater can hear an approaching boat before someone floating on the surface can.

A

True. Sound travels faster in solid objects than air

27
Q

True or False?

The windpipe is the part of your throat that vibrates and contains the two vocal cords.

A

False

28
Q

True or False?

A sonic boom occurs when an object travels faster than the speed of sound.

A

True

29
Q

True or False?

Scientists can use sound to measure and map the depths of the ocean.

A

True

30
Q

True or False?

When a sound is amplified, it is made softer.

A

False

31
Q

Define vibrate

A

bounce back and forth

Science - Light and Sound (2 decks)

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