When a wave reaches the boundary between two media...

part of the energy is reflected from the boundary.

part of the energy is transmitted into the new medium.

part of the energy can be absorbed by the new medium.

When a wave moves into a new medium which of the following is always true.

The frequency of the wave remains constant

The amplitude of the wave remains constant

The wavelength of the wave remains constant

The velocity of the wave remains constant.

Which best expresses how humans "hear" sound.

Sound vibrations are passed into the inner ear by eardrum, hammer, anvil, and stirrup. Inside the cochlea these vibrations are converted into nerve impulses by the cilia of the cochlea.

Sound waves are turned into light waves as the travel through the eardrum, hammer, anvil, stirrup, and cochlea.

Sound waves are turned into radio waves by the cilia in the cochlea.

Electromagnetic sound waves are converted into mechanical sound waves by the ear.

What happens to the frequency of the detected sound if the source and observer are getting closer to each other?

The frequency will always be higher regardless of the relative motion when the objects are getting closer.

The frequency will be higher only if they are moving toward each other.

The will be higher only if the observer is stationary.

The frequency will be lower if the observer is catching up to a source moving in the same direction.

A stringed musical instrument has a string that is 1.0m long. While the string vibrates the wavelength changes from 2.0m, to 1.0m, to 0.25m, and back to 2.0m very quickly. What is true about this phenomena?

One of the waves is considered the fundamental frequency and the rest are called harmonic frequencies.

One of the waves is called the harmonic frequency and the rest are called fundamental frequencies.

The waves will interfere with each other causing a beat frequency.

They waves will have such similar sounds it will produce dissonance.

Which part of the ear is responsible for our sense of balance and body position?

The Ossicles: Malleus, Incus, and Stapes

Which part of the ear acts as a series of levers to transmit sound through the inner ear to the vestibule.

The Ossicles: Malleus, Incus, and Stapes

Which part of the ear is responsible for equalizing the air pressure in the inner ear to that of the outer ear?

The Ossicles: Malleus, Incus, and Stapes

Unit 8: Waves and Sound Vocab

Authored by Emily Edlund

Physics

12th Grade

NGSS covered

Used 6+ times

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A traveling disturbance that transfers energy from one point to another.

Period

Frequency

Wave

Pulse

Wavelength

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A single disturbance traveling through a medium.

Period

Frequency

Wave

Pulse

Wavelength

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The amount of time it takes to make on complete oscillation.

Period

Frequency

Wave

Pulse

Wavelength

If wave velocity increases and wavelength remains constant, the period will:

Increase

Remain the same

Decrease

Depend on the amplitude

Constructive interference results in:

Lower amplitude

Higher amplitude

No amplitude change

Wave cancellation

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What causes the alternating loud and soft sounds heard as beats?

Differences in wave speed

Differences in wave amplitude

Constructive and destructive interference

Changes in medium density

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The number of waves that pass a fixed point per unit of time.

Period

Frequency

Wave

Pulse

Wavelength

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Unit 8: Waves and Sound Vocab

A traveling disturbance that transfers energy from one point to another.

A single disturbance traveling through a medium.

The amount of time it takes to make on complete oscillation.

If wave velocity increases and wavelength remains constant, the period will:

Constructive interference results in:

What causes the alternating loud and soft sounds heard as beats?

The number of waves that pass a fixed point per unit of time.

Any wave that requires a medium.

Any wave where the vibrations are perpendicular to the direction of travel.

Any wave that does not require a medium.

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