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.

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.

Tags

NGSS.MS-LS1-3

Sound travels fastest through...

• gas
• liquid
• solids/metals
• space

How many parts does the ear have?

• one

• two

• three

Which travels faster: sound or light waves?

• sound
• light

Sound is produced when an object...

• Moves

• Makes a noise

• Vibrates

• Falls

Tags

NGSS.MS-PS4-1

True or False:

Sound energy needs a medium (solid, liquid or gas) to travel through.

• True

• False

Tags

NGSS.MS-PS4-2

True or False:

Sound energy can travel through outer space (a vacuum).

• True

• False