In this category, we add all the diy school project models for secondary school students,(Class 9 / Grade 9).
Where students can do themselves step by step for their school exhibition or fair
Introduction Green energy, also called renewable or sustainable energy, refers to energy obtained from natural sources that are continuously replenished and cause minimal harm to the environment. Examples include solar power, wind energy, hydropower, geothermal energy, tidal energy, and biomass. These sources differ from fossil fuels (coal, petroleum, and natural gas), which take millions of … Read more
Sustainable agriculture is a scientific approach to farming that focuses on producing food in a way that protects the environment, conserves natural resources, and improves the quality of life for farmers and society. With growing population, climate change, soil degradation, and water scarcity, there is an urgent need to adopt farming methods that are both … Read more
Here are 25 simple, creative, and easy Chemistry Working Model ideas for Class 9 — perfect for school exhibitions, project work, and practical demonstrations. 1. States of Matter Model Show solid–liquid–gas arrangement using balls, beads, and springs. 2. Water Purification Model DIY 3-layer filter: gravel, charcoal, sand + cotton. 3. Separation of Mixtures Filtration, sedimentation, … Read more
Concept / Principle: This project works on the principle of photoconductivity — using an LDR (Light Dependent Resistor).The LDR’s resistance decreases when light falls on it and increases in darkness.This change controls a transistor or relay circuit, which automatically turns ON the LED (street light) at night and OFF during the day. Main Concept:LDR senses … Read more
Concept / Principle: This model demonstrates how wind energy is converted into electrical energy using a wind turbine.When air (wind) blows on the blades, it makes them rotate — this rotation drives a DC motor (acting as a generator) that produces electric current to light up an LED bulb. Scientific Principle:Mechanical energy (rotation of turbine) … Read more