Which statement best explains that sound waves are pressure waves?
Sound waves have regions of compressions and rarefactions.
Sound waves cannot propagate through metals.
Sound waves move perpendicular to the medium particles.
Sound waves cannot propagate through water.

Question

Which statement best explains that sound waves are pressure waves?
Sound waves have regions of compressions and rarefactions.
Sound waves cannot propagate through metals.
Sound waves move perpendicular to the medium particles.
Sound waves cannot propagate through water.

anonymous · Answer

Sorry, 

correct answer is the first one 
sound waves are longitudinal waves therefore the particles vibrate back and forth. In other words, sound waves have regions of compressions and rarefactions. Also therefore sound waves do not move perpendicular to the medium particles. ofc, sound waves propagate through water and metals.