Can you suggest some working models related to science for class 9?

Answer 1

go for hydro power plant

i made this model when i was in ninth

this is very easy

on a thermacol make two houses or hut one road and most importantantly one dam

buy one small motor this is easily available in markets

it will cost you Rs 50

it will hawe a shaft

attach turbine to it made of silver foil which we use for food packaging

take two bulbs use it as light of the huts

make two street lights near roads

while showing its working use battery or cells to light them

you can explain it as when turbine rotates it produces electricity which we ase for domestic or industrial purpuse

Answer 2

1. Inclined Plane - Demonstrate how changing the angle of an inclined plane affects the effort needed to move an object uphill.
2. Mechanical Pulley - Show how multiple pulleys can be used to lift heavy objects easily by distributing the weight.
3. Solar Still - Create a simple model to show how solar energy can be used to purify water by distillation.
4. Ecosystem Terrarium - Build a small enclosed ecosystem in a jar to demonstrate the interconnectedness of living organisms and their environment.