Show:
So Wavy!
Something's Vibrating!
Do You H-EAR That?
Hello...hello...hello...
Miscellaneous
100
Sound travels in what form?
Waves
100
What is a vibration?
A vibration is a rapid movement back and forth.
100
What is the name of the outer ear that collects sound waves from the air?
The pinna
100
What is an echo?
An echo is when some sound waves reflect, or bounce off of, an object.
100
Through what type of matter does sound travel the FASTEST? Through what type of matter does sound travel the SLOWEST?
Sound travels the fastest through solids and the slowest through gases.
200
What type of wave is a sound wave? (Two part answer)
1. Mechanical waves 2. Longitudinal waves
200
How are vibrations created? Give an example from one of our investigations.
Vibrations are created when one object strikes another. Examples: When you strike a tuning fork against a table, the tuning fork begins to vibrate. When you drop a pebble in water, the pebble strikes the water, sending vibrations through the water.
200
What is the name of the first part of the ear that sound waves hit AFTER they travel through the ear canal?
The eardrum
200
What is echolocation?
Echolocation is using sound wave reflections, or echoes, to locate objects.
200
How are sound waves created?
By vibrating objects
300
What is a mechanical wave?
A mechanical wave is wave that requires a medium (or matter) in order to travel.
300
Does a vibration last forever?
No, the vibrations will eventually FADE away and stop, like with the tuning fork.
300
What is the name of the three tiny bones in the middle ear and what do they do?
The hammer, the anvil, and the stirrup amplify the vibrations and pass them along to the cochlea.
300
What are two animals that use echolocation?
Possible answers: bats, dolphins, whales
300
What is timbre? Give an example of two things that have different timbres.
Timbre is the unique sound that something (like an instrument or voice) makes. Possible examples: A violin has a different timbre than a trumpet. Mrs. Brown's voice has a different timbre than Luca's voice.
400
What is a longitudinal wave?
A longitudinal wave is where the wave travels in the same direction as the matter that it is moving through (like when the coils of a slinky move back and forth).
400
What are two parts of our ears that vibrate?
Possible answers: ear drum, anvil, hammer, stirrup, cochlea
400
What role does the cochlea play in hearing sound?
The cochlea carries the vibrations and passes them along to the auditory nerves. What role does the cochlea play in hearing sound?
400
How exactly do bats use echolocation?
Bats use echolocation to find food. They send out high-frequency sound waves. When those waves echo, or bounce off of mosquitoes, for example, the bat can detect where the mosquito is.
400
What is pitch? Give an example of two things that have different pitches.
Pitch is how high or low a sound is, based on its frequency (or how fast the object vibrated). Possible examples: A squeaky mouse has a higher pitch than a roaring lion. A large tuning fork has a lower pitch than a small tuning fork.
500
How do sound waves travel?
They travel across air molecules. The molecules collide against one another. Each time that the molecules push close together (compress) and then move away from each other again (rarefact), the sound wave gets passed along.
500
How do vibrations cause sound waves?
When an object vibrates, the air molecules around it begin to collide with each other. As the molecules come closer together (compression) and then move apart again (rarefaction), sound waves are created that travel through the air. How do vibrations cause sound waves?
500
What is the step-by-step process of how we hear sound?
Sound waves travel through the air. The pinna collects the sound waves and sends them traveling down the ear canal to the eardrum. The eardrum starts to vibrate. The eardrum passes the vibrations along to the hammer, anvil, and stirrup. These three tiny bones amplify the vibrations and pass them along to the cochlea. The cochlea carries the vibrations along to the auditory nerves. The auditory nerves change the vibrations to nerve impulses. The brain receives those nerve impulses and makes sense of the sound!
500
How have humans used echolocation?
Humans created submarines that send out high-frequency sound waves to detect how deep down objects are in the ocean.
500
What is an ultrasound?
An ultrasound is when millions of high-frequency sound waves are transmitted into the human body. The reflections, or echoes, that the sound waves send back are used to tell what is going on inside the body.