Thursday, 12 November 2015

CBSE Class 8 - Science Ch 13 - Sound (Worksheet)

Sound

Worksheet

CBSE Class 8 - Science Ch 13 - Sound (Worksheet)
Prolonged Use of Headphones and loud music can make you deaf

Write True or False for the senses given below. Also rewrite the false statements correctly:



1. Sound is a mechanical wave.

______________________________________________________


2. Sound can travel through vacuum.

_______________________________________________________



3. Sound is produced by a vibrating body.

_______________________________________________________



4. The maximum displacement of a body from its mean position is called amplitude of oscillation.

________________________________________________________


5. Loudness of a sound is measured in Hertz.

_______________________________________________________




6. Loudness of a sound depends on the frequency of the sound wave.

_______________________________________________________


7. Sound can travel through metals.

_______________________________________________________


8. In humans, sound is produced by larynx.

_______________________________________________________


9. Television and transistor radio at high volumes, some kitchen appliances, desert coolers, air conditioners, all contribute to noise pollution.

_______________________________________________________


10. Plantation on roadside can increase noise pollution.

_______________________________________________________



Answer:

1. True
2. False
3. True
4. True
5. False  (it is decibels dB)
6. False (depends on amplitude)
7. True
8. True
9. True
10. False (decrease)


3 comments:

  1. did not help me at all
    what is this simply fooling me

    ReplyDelete
  2. Actually some answers wrong
    bad.....

    ReplyDelete
  3. This comment has been removed by the author.

    ReplyDelete

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