Question

can anyone please tell me some working models for my science exbition in which no electrical appliances are used​

Answer 1

Answer:

HEY!!! I HAVE SOMETHING....BUT I'M NOT SURE THAT YOU'LL LIKE THIS......

A model of volcano

Explanation:

You need a coca cola bottle and some mentos

cut the bottle half and make it appear like a volcano

fill the bottle with coca cola and put some mentos each time when someone visits you

due to reaction between mentos and coca cola your volcano will appear to be erupting

HOPING THAT IT WILL HELP YOU....

THANK YOU.....