Gap Filling Quiz

Fill in all the gaps by dragging the words in the top bar to their correct places.
Correct answers will appear in green and incorrect answers will appear in red.
lncorrect answers may be corrected by dragging the correct word to its place in the paragraph.
   deafness      detect      ear      eardrum      echo      gases      loud      medium      noisy      solids      speed      Ultrasound      vibrations   
Sound is a form of energy caused by .
Sound needs a in which to travel.
The of sound depends upon the medium through which it travels.
It travels faster through than .
Sound can be reflected off surfaces by means of an .
is a high pitched sound beyond the detection of the human .
Humans sound in the inner ear after it causes the to vibrate.
Very sounds can cause .
Ear protection should be worn in places.