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1. WELCOME

2. INTRODUCTION
NAME – RUDRADATTSINH GOHIL
ROLL NO - 06
STD – 8TH
SUBJECT – SCIENCE
SUB-TEACHER – VINAY PANDYA SIR

3.  Sound is a
mechanical wave of
pressure
transmitted through
a solid, liquid, or
gas, composed of
frequencies within
the range of hearing
and of a level
sufficiently strong

5. 4) IT IS TRANSMITTED
THROUGH GASES, AIR AND
LIQUIDS AS LONGITUDINAL
WAVES, ALSO CALLED
COMPRESSION WAVES.
3) The speed of sound depends
on the medium the waves pass
through, and is a fundamental
property of the material.

6. 6) The speed of sound depends on the
elasticity and density of the medium
through which it is traveling.

7. 8) A vibrating object will
produce sound waves in the air.
For example, when the head of
a drum is hit with a mallet, the
drumhead vibrates.

8. 9) Sounds of a single pure frequency are
produced only by tuning forks and
electronic devices called oscillators
10) IT IS PRODUCED BY THE
VIBRATIONS IN A VIBRATING
MATERIAL BODY.

9. 12) It travels fastest in
solids (its speed is
about 5000 m/s in
steel and glass),
slower in liquids (its
speed is about 1300-
1600 m/s in water) and
slowest in gases (its
speed is 330 m/s in
air).

10. Sources-
1) http://en.wikipedia.org/wiki/Sound
2) www.physicsclassroom.com/class/sound/soundtoc.html
3) http://scienceworld.wolfram.com/physics/Sound.html
4) TEXTBOOK OF CBSCE 8TH CLASS ON PAGE NUMBER 164
1ST PARAGRAPH
5) http://science.howstuffworks.com/search.php?terms=sound
6)
http://www.syvum.com/cgi/online/serve.cgi/squizzes/physics/sound.
html