3.1

Question 1

a wave, vibration, or oscillation travelling through air or any type of matter, be it
gas, liquid, or even solid.

Answer 1

Sound waves

Question 2

requires a medium to propagate;

Answer 2

Mechanical wave

Question 3

where the particles of the medium are disturbed from the
equilibrium position

Answer 3

longitudinal wave

Question 4

is transmitted from its source outward.

Answer 4

disturbance of matter

Question 5

Parts of a Wave

Answer 5

Condensation
Refraction
Wavelength

Question 6

whenever the air molecules or particles are compressed, increasing the air
pressure.
this region travels away from the speaker at the speed of sound.
analogous to the compressed region of coils in a longitudinal wave on a spring.

Answer 6

Condensation

Question 7

whenever the air gains more room to expand, decreasing the air pressure.
similar to the stretched region of coils in a longitudinal Slinky wave.

Answer 7

Refraction

Question 8

Distance between consecutive condensations, or between consecutive
rarefactions.

Answer 8

Wavelength

Question 9

propagate along the direction of
compression and expansion in the same way that a longitudinal wave propagates in the
slinky.

Answer 9

Alternating refractions and condensations

Question 10

With v = λf, it can be proven that the wavelength and the frequency are

Answer 10

inversely proportional to each other

Question 11

is commonly referred to as the pitch of a sound.

Answer 11

sensation of a frequency

Question 12

Have frequencies between 20 Hz to 20,000 Hz.
Sound waves that human beings can be able to hear.

Answer 12

Audible waves

Question 13

Have frequencies below the audible range or less than 20 Hz.
Sound waves that big animals use to communicate.
Have longer wavelengths
Have the ability to get around obstacles without any energy loss.

Answer 13

Infrasonic waves

Question 14

Have frequencies above the audible range or greater than 20,000 Hz
Small animals use this for navigation / echolocation.

Answer 14

Ultrasonic waves