Question

Group Activity
Prepare a model to demonstrate movement of articles in solids.
liquids and cases.
For making this model you will need
A transparent jar
A big rubber balloon or piece of stretchable rubber sheet
A string
Few chick-pees or black gram or dry green peas.
How to make?
Put the seeds in the jar.
Sew the string to the centre of the rubber sheet and put some
tape to keep it tied securely.
Stretch and tie the rubber sheet on the mouth of the jar.
Your model is ready. Now run your fingers up and down the
string by first tugeng at it slowly and then rapidly.
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Answer 1

Explanation:

this all projects you see in Google lol

Answer 2

sorry this I don't know