Class 9 Exam > Class 9 Notes > Science Class 9 > Word Search: Types of Energy
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FAQs on Word Search: Types of Energy - Science Class 9
| 1. What are the different types of energy? |  |
Ans. There are several types of energy, including kinetic energy (energy of motion), potential energy (stored energy based on position), thermal energy (heat energy), chemical energy (energy stored in bonds of chemical compounds), electrical energy (energy from electric charges), nuclear energy (energy from atomic nuclei), and mechanical energy (sum of kinetic and potential energy). Each type has unique characteristics and applications in various fields.
| 2. How is energy converted from one form to another? | |
Ans. Energy conversion occurs when energy changes from one form to another, often following the law of conservation of energy, which states that energy cannot be created or destroyed. For example, in a hydroelectric power plant, potential energy from water stored in a reservoir is converted into kinetic energy as it flows down, which then turns turbines to generate electrical energy.
| 3. What is renewable energy and how does it differ from non-renewable energy? | |
Ans. Renewable energy comes from sources that are naturally replenished, such as solar, wind, hydro, geothermal, and biomass. Non-renewable energy, on the other hand, comes from sources that cannot be replenished within a human timescale, such as fossil fuels (coal, oil, and natural gas) and nuclear energy (from uranium). The key difference lies in sustainability and environmental impact.
| 4. Why is energy efficiency important? | |
Ans. Energy efficiency is important because it helps reduce energy consumption, lowers utility bills, and decreases greenhouse gas emissions. By using energy more effectively, we can conserve resources, reduce environmental impact, and contribute to sustainable development. Efficient technologies and practices lead to a cleaner, healthier environment.
| 5. What are some common applications of different types of energy? | |
Ans. Different types of energy have various applications. For instance, kinetic energy is used in vehicles and machinery, thermal energy is utilized in heating systems, chemical energy powers batteries and fuels, electrical energy drives appliances and technology, and nuclear energy is used in power plants for electricity generation. Each application plays a crucial role in modern society and industry.
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