How are sound waves like ripples in a pond?

• They are both types of electromagnetic radiation.

• They travel faster in water than they do in the air.

• They radiate outward from a central point.

• They have the same wavelengths.

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NGSS.MS-PS4-1

A supersonic aircraft travels faster than the speed of sound. What might be the top speed of such an aircraft?

• 200 kilometers per hour

• 500 kilometers per hour

• 1000 kilometers per hour

• 1500 kilometers per hour

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NGSS.MS-PS2-1

NGSS.MS-PS2-2

NGSS.MS-PS3-1

What is the function of the ridges on your outer ear?

• They prevent germs from entering your middle ear.

• They direct sound into your middle ear.

• They prevent loud noises from damaging your inner ear.

• They filter out very high and low-frequency sounds.

How is your eardrum like a real drum?

• It produces sound.

• It vibrates.

• It is frequently struck by the bones in your middle ear.

• It is hollow.

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NGSS.MS-LS1-3

NGSS.MS-PS4-1

NGSS.MS-PS4-2

What is unique about the hammer, stirrup, and anvil?

• They are the smallest bones in your body

• They are the only bones in your body that move

• They are the only bones located in your head

• They are the only bones that cannot be broken

If your inner ear lacked nerve fibers, what might happen?

• Sound would be unable to travel to your brain.

• Your eardrum would be unable to vibrate.

• Your hammer could not tap against your anvil.

• Sound waves could not enter your ear.

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NGSS.MS-LS1-3

Place the following events in sequence: A) Your eardrum begins vibrating; B) Electrical impulses travel along nerve fibers; C) The hammer, anvil, and stirrup begin moving

• B, C, A

• A, B, C

• B, A, C

• A, C, B

Deafness is to sign language as blindness is to:

• The inability to speak

• The Braille alphabet

• Eyeglasses

• A cane

Which word best describes the auditory (ear) canal?

• Filled with water

• Hollow

• Lined with sensitive nerve fibers

• Vibrating

Which of the following is a TRUE statement about cats?

• They can hear softer sounds than humans.

• Their ears are much larger than humans'.

• They can hear a wider range of sounds than humans.

• They communicate with one another with sounds that humans can't hear.