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Sound

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Sounds are almost everywhere in the world today. From cars honking to birds singing, sound can be a joy or a nuisance. In this investigation, you’ll experiment with different wave properties to determine what causes specific sounds. Listen up and get ready to dive into this investigation of sound waves.

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What is a wave?

A wave is a disturbance that travels through a medium from one location to another location caused by a vibrating source.

What is a sound wave?

A sound wave is a form of energy caused by a disturbance or vibration that moves through a medium as a wave.

What is the equilibrium position of a medium?

The equilibrium position of a wave is the level of the medium when no wave is passing through the medium.

What is a wave peak?

The wave peak is the tallest point on a wave that has the maximum amplitude. The peak is also called the crest of a wave.

What is a wave trough?

The wave trough is the lowest point on a wave that has the maximum amplitude.

What is the wavelength of a wave?

The wavelength is the distance between successive peaks of a wave.

What is the frequency of a wave?

The frequency of a wave is the number of wave peaks that pass a fixed point in space in a given unit of time.

What is the period of a wave?

The period is the length of time for one wavelength of a wave to pass a given point in space.

What is the speed of a wave?

The wave speed is the distance one wave travels in a specific unit of time.

What is a medium?

The medium is the matter that a wave travels through.

How are transverse and longitudinal waves different?

In transverse waves, the medium is disturbed vertically in space to transfer the wave energy, while a longitudinal wave disturbs the medium horizontally to transfer the wave energy.

What is the volume of a sound?

The volume of a sound is a measure of the loudness of softness and is a measure of the strength of the vibrations of the medium.

What is the pitch of a sound?

The pitch is a measure of the frequency of a sound.

What is a compression region of a sound?

A region in a longitudinal wave where the particles of the medium are closest together.

What is a rarefaction region of a sound?

A region in a longitudinal wave where the particles of the medium are farthest apart.

Here are some definitions to help you in your Grade 3-5 Lesson 1 investigation.

Wave – a disturbance that moves through a medium from one place to another place.
Medium – the matter or substance that a wave moves through, such as water or air.
Disturbance – something that causes a wave, such as dropping a rock in water or wind blowing across the top of the water.
Equilibrium Position – the normal level of the water when no wave is passing through the water.
Wave Peak – the highest or tallest point on a wave. The wave peak is also called the wave crest.
Wave Trough – the lowest point on a wave.
Wavelength – the distance from one peak to the adjoining peak.
Frequency – the number of waves (or cycles) that pass a given point in space per unit time.

Here are some definitions to help you in your Grade 3-5 Lesson 2 investigation.

Wave – a disturbance that moves through a medium from one place to another place.
Medium – the matter or substance that a wave moves through, such as water or air.
Sound – a form of energy caused by a disturbance or vibration that moves through a medium as a wave.
Disturbance – something that causes a wave, such as a vibrating drumhead.
Equilibrium Position – the normal position of the particles of a medium when no wave is passing through the medium.
Wave Peak – the highest or tallest point on a wave. The wave peak is also called the wave crest.
Wave Trough – the lowest point on a wave.
Wavelength – the distance from one peak to the adjoining peak.
Frequency – the number of waves (or cycles) that pass a given point in space per unit time.
Wave Speed – how fast a wave is moving through a medium.
Volume – how loud or soft a sound is.
Pitch – how high or low a sound is.
Tone – a sound that can be heard due to the vibration of a medium.
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