[tex]\sf\underline{{\:Directions:}}[/tex]Complete the following sentences .Write your answer in your answer sheet.

Sound waves are also known as 1._____________,and need 2.__________ to propagate.Sound travels fastest in 3._________ and slowest in 4.________. When we talk, our 5. _______vibrate, making air particles vibrate in the esophagus. Sound waves with frequencies less than 20Hz are called 6. _______ or subsonic and those with frequencies above 20kHz are called 7. _______ . The human ear can only recognize sounds of frequencies in the range of 20 Hz and 20,000 Hz and this range of frequency is called 8. ________. 9. _______ refers to the highness or lowness of sound. 10._______ is how soft or how intense the sound is as perceived by the ear and interpreted by the brain.

[tex]\colorbox{pink}{\boxed{\tt{Pasagot!}}}[/tex]

Nonsense, Coppied, Incomplete and Unhelpful Answers Will be [tex]\tt\red{{\:REPORTED!}}[/tex]!
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