When air molecules vibrate forcefully, the sound is said to be high in ______________________________ 4.
(air molecules; vibrate forcefully; ) (the sound; is said; T:When air molecules vibrate forcefully) (the sound; to be; high in ______________________________ 4)
air molecules the sound the sound
vibrate forcefully is said to be
T:When air molecules vibrate forcefully
high in ______________________________ 4