Question

what is the best idea for science exhibition

Answer 1

make a wind mill or a hydroelectricity plant

Answer 2

hi there...!!
you know there are many idea to participate.in science exhibition..so I'm here to share one of the idea of mine when I too have participated in science fairs..so you can think about the topic" E.waste"-it means electronic waste.so we know nowadays the usage of electronic items has been increasing day by day in our life.when these electronic products become repaired,these waste have been dumped in a place.So these waste electronic material consists of many chemicals,and hazardous materials which are harmful for not only for humans but also for animals and birds. here you can make a model of a xerox shop in which the Xerox machine exerts a lot of black powder. this powder is nothing but activated carbon...these materials when exposed to the atmosphere it penetrates into the ground water which leads to water pollution..these water is used agriculture and for animal feedings..so this leads to destruction of living beings..so for this you can make a small tray of having a small hole at that bottom. fill it with sand.so you can place a small cup under the tray so that it seems to be as ground water with a bit carbon particles.and you can grow grass on that tray. and make some play animals to eat the grass like and so...