Physics 6.1.9

Question 1

Sound Waves are ___ of Air Molecules.

Answer 1

Vibrations.

Question 2

What Happens when a Sound Wave comes in to Contact with a Solid?

Answer 2

The Vibrations can be Transferred to the Solid.

Question 3

Sound is an Example of a Longitudinal Wave, hence it Consists of: (2)

Answer 3

-Compression: Regions of Higher Density.

-Rarefaction: Regions of Lower Density.

Question 4

Why can Sound Waves be Heard by Humans?

Answer 4

Because Sound Waves are Transferred from the Air to the Solid Components of the Ear.

Question 5

Explain how we can Hear Sound. (4)

Answer 5

-The Sound Waves Travel Down the Auditory Canal, Towards the Eardrum.

-The Pressure Variations Created by the Sound Wave Exert a Varying Force on the Eardrum, Causing it to Vibrate.

-The Vibration Pattern of the Sound Waves Creates the Same Pattern of Vibration in the Ear Drum. 3 Small Bones Vibrate.

-The Vibrations of the 3 Small Bones then Transfers Electrical Signals to our Brain: Sound.