4th Grade Sound Quiz

2.

The _______ sends sound wave messages to the brain.

Auditory Nerve
Eardrum
Outer Ear
Ear lobes

Correct Answer

A. Auditory Nerve

Explanation

The auditory nerve is responsible for sending sound wave messages to the brain. It is a bundle of nerve fibers that transmit electrical signals from the cochlea, a part of the inner ear, to the brain. These electrical signals are generated in response to sound vibrations and are then interpreted by the brain as sound. The auditory nerve plays a crucial role in the process of hearing, allowing us to perceive and understand sounds in our environment.

Rate this question:

21

3.

The amount of energy in a sound wave is called.

Frequency
Amplitude
Intensity
Velocity

Correct Answer

A. Amplitude

Explanation

The amount of energy in a sound wave is called amplitude. Amplitude refers to the maximum displacement or distance from the equilibrium position of a particle in a sound wave. It represents the intensity or loudness of the sound wave. Higher amplitudes indicate louder sounds with more energy, while lower amplitudes indicate softer sounds with less energy. Frequency, on the other hand, refers to the number of complete cycles or vibrations of a sound wave per unit of time. Intensity is a measure of the power or energy per unit area of the sound wave, and velocity refers to the speed at which the sound wave travels.

Rate this question:

21

4.

_________ is a measure of how high or low a sound is.

Correct Answer
Pitch
pitch

Explanation
Pitch is a measure of how high or low a sound is. It refers to the perceived frequency of a sound wave, where a higher pitch corresponds to a higher frequency and a lower pitch corresponds to a lower frequency. Pitch can be determined by the rate at which sound waves vibrate, with faster vibrations resulting in higher pitches and slower vibrations resulting in lower pitches. The term "pitch" can be written in lowercase as "pitch" or in uppercase as "Pitch".

Rate this question:

20

5.

The eardrum vibrates back and forth to make a sound.

True
False

Correct Answer

A. True

Explanation

True. The eardrum, also known as the tympanic membrane, vibrates back and forth in response to sound waves entering the ear. These vibrations are then transmitted through the middle ear to the inner ear, where they are converted into electrical signals that the brain interprets as sound.

Rate this question:

14

6.

When sound is reflected off an object and bounces back, we hear it again.

Focusing of Sound
Reflection of Sound
Echo
Refraction of Sound

Correct Answer

A. Echo

Explanation

When sound waves hit a surface, they bounce back and travel back towards the source. This phenomenon is known as reflection of sound. When the reflected sound waves reach our ears, we perceive it as an echo. The echo is the repetition of the original sound, heard after a short delay due to the time taken for the sound waves to travel to the surface and back.

Rate this question:

14

7.

Frequency measures the number of sound waves that pass in one second.

True
False

Correct Answer

A. True

Explanation

Frequency is a measure of how many sound waves pass through a point in one second. It is commonly measured in hertz (Hz), which represents the number of cycles per second. Therefore, the statement that frequency measures the number of sound waves that pass in one second is true.

Rate this question:

13

8.

The sound waves cause the bones inside the ear to vibrate against the __________.

Correct Answer
eardrum
Eardrum
ear drum
Ear drum

Explanation
The sound waves cause the bones inside the ear to vibrate against the eardrum. The eardrum, also known as the tympanic membrane, is a thin, sensitive membrane that separates the outer ear from the middle ear. When sound waves enter the ear canal, they cause the eardrum to vibrate. These vibrations are then transmitted to the bones in the middle ear, which amplify the sound and send it to the inner ear for further processing.

Rate this question:

13

9.

Insulation between walls or carpet and fabric in a room are examples of things that

Absorb Sound
Focus Sound
Reflect Sound
None of the above

Correct Answer

A. Absorb Sound

Explanation

Insulation between walls or carpet and fabric in a room are examples of things that absorb sound. When sound waves hit these materials, they are absorbed rather than being reflected or focused. This absorption helps to reduce echoes and reverberation in the room, resulting in a quieter and more acoustically comfortable environment.

Rate this question:

15

10.

When objects vibrate, they create sound.

True
False

Correct Answer

A. True

Explanation

When objects vibrate, they create sound. This is because vibrations cause the molecules of the object to move back and forth, creating waves of pressure in the surrounding air. These pressure waves then travel through the air as sound waves, which can be detected by our ears. Therefore, it is true that objects create sound when they vibrate.

Rate this question:

14

11.

Vocal cords vibrate inside the ear when sound waves enter.

True
False

Correct Answer

A. False

Explanation

The statement is incorrect. Vocal cords do not vibrate inside the ear when sound waves enter. Vocal cords are located in the larynx, not the ear. Sound waves enter the ear and are processed by the ear's complex structure, including the eardrum, middle ear bones, and cochlea. The vibration of the vocal cords produces sound, but it is not directly related to the ear's function in processing sound waves.

Rate this question:

10

12.

When sound is bounced off an object, it is called

Reflection of Sound
Focusing of Sound
Absorption of Sound
All of the above

Correct Answer

A. Reflection of Sound

Explanation

When sound waves hit an object, they can bounce back in different directions. This phenomenon is known as the reflection of sound. It occurs when the sound waves encounter a surface that is smooth and hard enough to reflect the sound waves back into the surrounding environment. This is similar to how light waves can be reflected off a mirror. The other options, focusing of sound and absorption of sound, do not accurately describe the process of sound bouncing off an object.

Rate this question:

11

13.

Catches the sound waves and focuses them on the eardrum

Hammer, anvil, and stirrup
Eardrum
Outer ear
Inner ear

Correct Answer

A. Outer ear

Explanation

The outer ear is responsible for catching sound waves and directing them towards the eardrum. It consists of the pinna (visible part of the ear) and the ear canal. The pinna helps in collecting sound waves from the environment and funnels them into the ear canal. The ear canal then carries these sound waves towards the eardrum, which is a thin membrane that vibrates in response to the sound waves. Therefore, the outer ear plays a crucial role in capturing and focusing sound waves onto the eardrum.

Rate this question:

7

14.

When an object takes in sound energy.

Reflection of Sound
Absorption of Sound
Focusing of Sound
Eating of Sound

Correct Answer

A. Absorption of Sound

Explanation

When an object takes in sound energy, it means that the object is absorbing the sound waves rather than reflecting or focusing them. Absorption of sound occurs when the energy of the sound waves is converted into heat energy within the object. This can happen when the object is made of materials that are good at absorbing sound, such as soft or porous materials. Absorption of sound helps to reduce echoes and reverberations in a space, making the sound clearer and less distorted.

Rate this question:

12

15.

Cupping your hands or yelling into a cone-shaped object are examples of absorption of sound.

True
False

Correct Answer

A. True

Explanation

Cupping your hands or yelling into a cone-shaped object can both help to absorb sound. When you cup your hands, you create a small space for the sound waves to bounce around in, which reduces the volume and makes it less audible. Similarly, when you yell into a cone-shaped object, the sound waves are directed into a smaller space, causing them to bounce around and lose energy. This absorption of sound is why these actions can help to reduce the volume or make the sound less noticeable.

Rate this question:

15

4th Grade Sound Quiz

Intensity is a measure of how loud or soft a sound is.

Quiz Preview

The _______ sends sound wave messages to the brain.

The amount of energy in a sound wave is called.

_________ is a measure of how high or low a sound is.

The eardrum vibrates back and forth to make a sound.

When sound is reflected off an object and bounces back, we hear it again.

Frequency measures the number of sound waves that pass in one second.

The sound waves cause the bones inside the ear to vibrate against the __________.

Insulation between walls or carpet and fabric in a room are examples of things that

When objects vibrate, they create sound.

Vocal cords vibrate inside the ear when sound waves enter.

When sound is bounced off an object, it is called

Catches the sound waves and focuses them on the eardrum

When an object takes in sound energy.

Cupping your hands or yelling into a cone-shaped object are examples of absorption of sound.