Question

Working science modal

Answer 1

you can prepare a working model of balloon powered car which is based on newtons 3rd law.
you can also prepare the working model of windmill, nuclear power plant,kaleidoscope,electricity from fruits etc.. but these are a bit difficult the easy one u can do is balloon powered car. it is very simple and easy.
Hope this helps u...
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Answer 2

You can make model of volcano or structure of an atom. Electricity fom potatoes or lemon