14. Sources of Energy Class 10 Science [LATEST] Solutions Chapter Review in English - CBSE Study
NCERT Solutions for Class 10 Science are carefully prepared according to the latest CBSE syllabus and NCERT textbooks to help students understand every concept clearly. These solutions cover all important 14. Sources of Energy with detailed explanations and step-by-step answers for better exam preparation. Each Chapter Review is explained in simple language so that students can easily grasp the fundamentals and improve their academic performance. The study material is designed to support daily homework, revision practice, and final exam preparation for Class 10 students. With accurate answers, concept clarity, and structured content, these NCERT solutions help learners build confidence and score higher marks in their examinations. Whether you are revising a specific topic or preparing an entire chapter, this resource provides reliable and syllabus-based guidance for complete success in Science.
Class 10 English Medium Science All Chapters:
14. Sources of Energy
1. Chapter Review
Chapter Review:
- Properties of good fuels (i) they doesn't cause air pollution (ii) Which would do a large amount of work per unit volume or mass. (iii) Be easily accessible.
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Coal, petroleum and natural gas are called fossil fuels. As Such fuels were formed by the slow decomposition of fossils (remains of plants and animals) which got buried under the surface of earth and take millions years to form.
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Energy can only be converted from one form to another. It can neither be created nor destroyed. The total energy before and after the transformation remains the same. This law is valid in all situation and transformation. That is called the law of conservation of energy.
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The turbine works by mechanical energy which it gets from various sources like water energy, Wind energy and nuclear energy etc.
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Some gases like CO2 and methane traps heat from sun rays. Our atmosphere does not allow the radiations to go out. This is called green house effect.
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Oxide of sulpher and nitrogen react with water vapour in atmosphere and produce acidic substance, its rain is called acid rain.
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The source of energy obtained from plants and animals said to be Bio-mass. Ex-: Wood, cow-dung etc.
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Mixture of cow dung and water is said to be slurry.
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The black colour absorbs heat more frequently than others.
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Solar cell is a device which converts sunlight into electricity.
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Silicon metal is used for making solar cell.
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Silver metal is used for interconnection of solar cells.
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The dynamo convert the mechanical energy into electrical energy.
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Geological changes, molten rocks formed in the deeper hot regions
of earth’s crust are pushed upward and trapped in certain regions called ‘hot spots’.
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