Question

a sound wave moves through air by causing air particles to:
vibrate back and forth
move up and down
stay still while energy moves past
move in circles
4 multiple choice 1 point
the number of waves that pass a given point in one minute is called the waves:
wavelength
velocity
amplitude
frequency

Explanation:

First Question (Sound Wave and Air Particles)

Sound waves are longitudinal waves. In a longitudinal wave, the particles of the medium (air, in this case) vibrate parallel to the direction of wave propagation, which means they vibrate back and forth. Moving up and down is characteristic of transverse waves (like light or water waves in some cases), particles don't stay still as energy is transferred, and circular motion isn't how air particles move in sound waves.

Frequency is defined as the number of waves (or cycles) that pass a given point per unit time. Here, the unit time is one minute. Wavelength is the distance between two consecutive crests/troughs, velocity is wave speed (distance per time), and amplitude is the maximum displacement of particles from equilibrium. So the number of waves per minute relates to frequency.

Answer:

A. Vibrate back and forth

Second Question (Wave Property Definition)