Page 69 - Science Class 6 Times Publication

Activity 6.2
To show the relation between sharpness of sound and length of
vibrating object

Materials required: A scale, a table

Procedure

1. Take a scale and place it on a
table so that more than half
part comes out of the edge of
the table.

2. Press one end of the scale
with one hand and pull the
free end of the scale upward
with another hand and leave
the scale. What will you
observe?

Make the free end shorter and repeat the above activity. What
differences do you nd in the sound of above two cases.

Observation: The sound in the second case is sharper than the  rst
case. Repeat the experiment for several times by shortening the free
end of the scale.

Conclusion: Smaller or shorter object produces sharp sound.

Loudness of sound

Take a small drum and hit the drum with a drum stick. Listen to the
sound. Now, take a large drum and hit the drum with a drum stick.
a
you
Listen to the sound produced. What differences do you nd in the
 n
sound of two drums?

Times' Crucial Science and Environment 65 Book 6