Question

how sounds are made longitudinal waves are generated when a source of energy forces the matter in a medium to _. this back - and - forth motion pushes air particles together, generating a _ or moves the particles apart, generating a _.

Explanation:

Sound is a longitudinal wave. When an energy - source makes matter in a medium vibrate back - and - forth, air particles are pushed together to form compressions and moved apart to form rarefactions.

Answer:

vibrate; compression; rarefaction