on on
ferent
each
one
elf is
the thread? Take metal wire instead of the
thread and also change the length of thread/
wire and repeat the activity. Discuss with
your friends and teacher about your
conclusions
'Take a plastic or tin can or a plastic glass.
Remove its bottom. Stretch a piece of rubber
balloon across one end and fix it with a
rubber band. Put a few grains of say ragi or
bajra on the stretched rubber. Now ask your
friend to shout 'Hoorrey..... Hoorrey.....
from the open end of the glass. Observe the
dancing of the grains up and down. Discuss
the reason behind this.
ce to
ated
nich
and
und
Answers
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