Question

topic for working model of science class 9th

Answer 1

1-Rain water harvesting
2-Electric Motor
3-Electricity from fruits
4-Solar Car
5-Solar Wind Mill
6-Volcano 
7-Magnetic Field
8-Electric Current
9-Germination
10-Neutralization Reactions

Answer 2

Some good options for the working model for class 9th are --------> (1) Creating electric current with a magnet............................. (2) Creating current with fruits.......................... (3) Electromagnetism........................ (4) Rain water Harvesting..................... (5) Use of solar energy like for producing currents or make a solar car............... (6) Plants in different environment( light intensity, colour)...................…...... Etc...