Question

2. Take a plastic or in con 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 soy ragi or
baira on the stretched rubber. Now ask your
friend to shout "Hoorrey Hooney
from the open end of the glass. Observe the
dancing of the grains up and down. Discuss
the reason behind this​

Answer 1

Answer:

in another another activity there will be another or there shall be another and other things happen that is due to of our universe force of gravitation

Answer 2

this activity shows that how our eardrum of ear works. The sound which travels to our ear hits to the eardrum and due to this hit it cause a vibration. Due to the mean of air through vibration motion makes us hear the sound which our friend has spoken ( as per the given activity ). This activity makes us clear that our eardrum works through the vibration through air.