2. I’m all EARS! What are some sounds that I hear? Move your mouse Click on the Falls

3. Niagara Falls

4. How do my ears work?

5. Humans cannot hear sounds that vibrate: too fast (pitch is too high) too slow (pitch is too low) too large (volume is too loud) too small (volume is too soft) Human hearing is limited to a range of sounds.

7. “Old MacDonald... Had Two Ears”

8. Verse One Old MacDonald Had Two Ears E… I… E… I… …O Three parts each so he could hear E… I… E… I… …O With an outer ear, middle ear Inner ear hear, Inner ear there Here an ear, there an ear Everywhere an ear, ear Old MacDonald Had Two Ears E… I… E… I… …O

9. Sound Waves enter the outer ear E… I… E… I… …O They hit the drum and it is clear E… I… E… I… …O With a Wave, Wave here and a Wave, Wave there Here a Wave, there a Wave, everywhere a Wave, Wave An outer ear, middle ear Inner ear hear, Inner ear there Here an ear, there an ear Everywhere an ear, ear Sound waves enter the outer ear E… I… E… I… …O

10. Vibrations move the little bones E… I… E… I… …O Moving fluid so we hear tones E… I… E… I… …O With a Whoosh, Whoosh here, and a Whoosh, Whoosh there Here a Whoosh, there a Whoosh, Everywhere a Whoosh, Whoosh Wave, Wave here and a Wave, Wave there Here a Wave, there a Wave, everywhere a Wave, Wave An outer ear, middle ear Inner ear hear, Inner ear there Here an ear, there an ear Everywhere an ear, ear Vibrations move the little bones E… I… E… I… …O

11. This moving fluid signals my brain E… I… E… I… …O I hear the sound of a jet airplane E… I… E… I… …O With a Zoom, Zoom here, and a Zoom, Zoom there Here a Zoom, there a Zoom, everywhere a Zoom, Zoom Whoosh, Whoosh here, and a Whoosh, Whoosh there Here a Whoosh, there a Whoosh, Everywhere a Whoosh, Whoosh Wave, Wave here and a Wave, Wave there Here a Wave, there a Wave, everywhere a Wave, Wave An outer ear, middle ear Inner ear hear, Inner ear there Hear an ear, there an ear Everywhere an ear, ear Sound Waves signal my own brain!!! E… I… E… I… …O !!