CLASS9 · Physics · Sound — Spot the Error

Exercise and reference answers

Questions

1. Statement parts

   1. Sound
   2. travels
   3. fastest
   4. through
   5. gases
   6. .

   Correction

   solids

   Incorrect part

   gases

2. Statement parts

   1. Pitch
   2. of
   3. a
   4. sound
   5. depends
   6. on
   7. its
   8. amplitude
   9. .

   Correction

   frequency

   Incorrect part

   amplitude

3. Statement parts

   1. The
   2. human
   3. ear
   4. can
   5. hear
   6. frequencies
   7. above
   8. 20
   9. kHz
   10. .

   Correction

   between 20 Hz and 20 kHz

   Incorrect part

   above

4. Statement parts

   1. An
   2. echo
   3. is
   4. heard
   5. when
   6. sound
   7. is
   8. absorbed
   9. by
   10. a
   11. surface
   12. .

   Correction

   reflected

   Incorrect part

   absorbed

Instructions

Tap the wrong word in each statement.