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
1. What is an electric bell? 2. How does an electric bell function? 3. What are the main components of an electric bell? 4. Why is the electromagnet important in an electric bell? 5. How does the armature move in an electric bell? 6. Explain the role of the spring in an electric bell. 7. … Read more
1. What is a hydraulic bridge? 2. How does a hydraulic bridge differ from a traditional fixed bridge? 3. What is the primary purpose of a hydraulic bridge? 4. What are the common types of hydraulic bridges? 5. How does a bascule bridge operate? 6. What is the function of the counterweight in a bascule … Read more
1. What is an earthquake alarm? 2. How does an earthquake alarm work? 3. What is the purpose of an earthquake alarm? 4. Can earthquake alarms prevent earthquakes? 5. How accurate are earthquake alarms? 6. Are earthquake alarms commonly used worldwide? 7. What types of sensors are used in earthquake alarms? 8. How can earthquake … Read more
1. What is air pollution? 2. What are the main sources of air pollution? 3. How is air quality measured? 4. What are the health effects of air pollution on humans? 5. How does air pollution affect the environment? 6. What is smog, and how is it formed? 7. What is the role of particulate … Read more
1. What is an air cooler? 2. How does an air cooler differ from an air conditioner? 3. What are the basic components of an air cooler? 4. Explain the working principle of an air cooler. 5. In which climatic conditions are air coolers most effective? 6. How is an air cooler maintained? 7. Can … Read more
1. What is a rain alarm? 2. How does a rain alarm work? 3. What are the common types of rain sensors used in rain alarms? 4. Why is a rain alarm useful? 5. Can rain alarms be used for agricultural purposes? 6. How can rain alarms contribute to water conservation? 7. Are rain alarms … Read more
1. What is the function of the human eye? 2. What are the main parts of the eye? 3. What is the cornea, and what is its role in vision? 4. What is the function of the iris? 5. What is the pupil, and how does it respond to light? 6. How does the lens … Read more
1. What is a dam? 2. What is the primary purpose of a dam? 3. How is a dam different from a reservoir? 4. What are the types of dams based on construction material? 5. How do gravity dams work? 6. What is the purpose of spillways in dams? 7. How does a dam contribute … Read more
1. What is an escalator? 2. Who invented the escalator? 3. How does an escalator work? 4. What powers an escalator? 5. What are the safety features of escalators? 6. How is the direction of an escalator determined? 7. What is the purpose of the comb plate at the entrance of an escalator? 8. Can … Read more
1. What is a wind turbine? 2. How does a wind turbine work? 3. What is the purpose of the tower in a wind turbine? 4. What is the difference between a horizontal-axis and a vertical-axis wind turbine? 5. Why are wind turbines often placed in windy locations? 6. What is the purpose of the … Read more
1. What is the function of the heart? 2. How many chambers does the human heart have? 3. What is the purpose of the heart valves? 4. What is the pacemaker of the heart? 5. What is a heart attack? 6. What is the role of arteries in the circulatory system? 7. How do veins … Read more
1. What is hemodialysis? 2. Why is hemodialysis necessary? 3. What is the role of an artificial kidney in hemodialysis? 4. How does an artificial kidney work? 5. What is the dialysate in hemodialysis? 6. How often is hemodialysis typically performed? 7. What are the common conditions that necessitate hemodialysis? 8. What are the potential … Read more
Hemodialysis and Artificial Kidney Introduction: Hemodialysis: Hemodialysis is a medical procedure used to remove waste products and excess fluids from the blood when the kidneys are unable to perform these functions adequately. This therapy is crucial for individuals with kidney failure or impaired kidney function. Hemodialysis helps maintain a balance of electrolytes and fluid in … Read more
1. What is acid rain? 2. What are the main sources of sulfur dioxide and nitrogen oxides causing acid rain? 3. How does acid rain form? 4. What is the pH range of acid rain? 5. How does acid rain affect aquatic ecosystems? 6. What impact does acid rain have on soil? 7. How does … Read more
1. Definition: 2. Causes: 3. pH Levels: 4. Components: 5. Impact on the Environment: 6. Sources of Pollution: 7. Geographical Distribution: 8. Human Health Impact: 9. Mitigation Strategies: In summary, while normal rain is a vital component of the Earth’s natural processes, acid rain is a result of human-induced pollutants, causing harmful effects on the … Read more