Sound

Sound

100

What is sound?

A form of energy that travels through matter.

200

Name a tool that would make a sound louder.

An amplifier, a megaphone, ...

300

How is volume measured?

Decibels

400

List 3 mediums that sound travels through from fastest to slowest.

Sample Answer: Metal, water, air

500

Draw and label a wave including: crest, trough, wavelength, resting point, and amplitude.

Crest - top of the wave Trough - bottom of the wave Wavelength - distance from crest to crest Amplitude - height of a wave from resting point Resting point - the middle (dotted) line

Sound

100

The amount of crests (or troughs) that occur in a minute. This trait of waves affects pitch.

What is frequency?

200

High frequency equals _______ pitch.

What is high?

300

Name 3 materials that can make a sound softer.

Earmuffs, ear plugs, pillow, etc.

400

Draw a high frequency wave.

(Your picture of this wave should have many crests and troughs close together.)

500

Draw a low frequency wave.

(Your picture of this wave should have very few crests and troughs spread far apart.)

Parts of the Ear

100

This part of the ear is the FIRST to vibrate when sound enters the ear.

What is eardrum?

200

This part of the ear "collects" sound to send to the ear canal.

What is outer ear?

300

List the 3 parts of the inner ear.

Hammer, Anvil, and Stirrup

400

This part of the ear looks like a spiral or seashell. It sends the vibrations to the brain to turn it into sounds.

What is cochlea?

500

The ear has another job (other than hearing). What is its other job?

Our ear has semicircular canals that help keep our balance.