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Chap.16, , Fuels, , Hard words:, 1. Invention, , 2. Petroleum, , 3. Compressed Natural Gas, 4. Oil refinery, , 5. Exhaustible, , 6. Consumption, 7.alternative, , 8. Extracted, , 9. Processed, , 10. Efficiency 9:59 PM W, , Exercises:., , A. Tick the correct answer:, , 1. The distance covered by a vehicle, consuming 1 litre of fuel is called, a) mileage. b) everage c) distance, answer a) mileage, , 2. Which is a non renewable source, of energy, , a)coal b) biogas. c)wind, , answer a) Coal, , B. Write true or false:, , 1. In earlier times,man had to walk, or ride on the back of animals for, travelling. (true), , 2. The invention of the wheel, improve the means of transport., (true), , 3. The means of transport need, power to move .(true), , 4. We should not conserve fuel ., , (False) 9:59 PM W, , C. Fill in the blanks:, , 1. A material that produces energy on, burning is called, ie is obtained from Oil well ., 3. The word petroleum means oil, from, Ans.1. Fuel, , 2.Petroleum, , 3. Rocks 9:59 PM W, , Chap.-16, , Fuels, , Word - meanings, , 1. Resources- a source of supply or, support., , 2. crust- the outer surface of a planet., 3. mines- a pit of tunnel from which, , ( coal, gold, iron etc.) are taken., , 4. refinery- a place where, , something is refined., , 5. exhaustible- to completely use, , up( something such as supplies or, money)., , 6. consumption- the use of, something ( such as fuel)., , 7. renewed- to make (something), new, fresh or strong again., , 8. Piston- a part of an engine that, moves up and down inside a tube, and that causes other parts of engine, to move. 9:59 PM W/, , , , , , , , D. Answer the following questions:, Q.1. What do you understand by nonrenewable resources of energy?, , Ans. The sources of energy which get, exhausted very soon, are called non, renewable sources of energy. Coal, and petroleum are examples of non, renewable sources of energy., , 9:59 PM YW, , Q.2. How does petrol reach a petrol, pump?, , Ans. Petrol is extracted in the oil, refinery from the crude oil, it is then, supplied to petroleum depots by, train or trucks. These depots further, supply it to petrol pumps by trucks., , 9:59 PM W, , Q.3. What is CNG ?, , Ans. CNG is compressed natural gas, it causes less pollution as compared, to petrol and diesel. 9:59 PM W, , Q.4. How can we conserve coal and, petroleum?, , Ans. We can conserve coal and, petroleum by preventing their, wastage, by using alternative sources, of energy and by using public means, of transport. 9:59 PM W, , E. Think and answer:, Q. What is geothermal energy ?, , Ans. The energy obtained from the, Earth's crust due to heat is called, geothermal energy. 9:59 PM W, , Q.1 What is CNG.?Why is it so useful?, Ans. CNG is compressed natural gas., It is a fuel that can be used in place, of diesel and gasoline, it is useful, because it is lighter than air and, disperses quickly when released., , 9:59 PM YW, , Q.2. Why should we use coal and, petrol in careful manner?, , Ans. Coal and petrol are non, -renewable resources, and are fossil, fuels, if they depleted they will never, be available again. Therefore it is, important to conserve fossil fuels., , 9:59 PM YW, , Q.3. What is solar power?, Ans. Solar power is the conversion of, energy from sunlight into electricity., , 9:59 PM W
