question_answer184) (a) The use of non-conventional sources of energy is becoming necessary in our country. Give three reasons to support the above statement. Or Why is there a pressing need to use renewable energy sources? Explain. (b) What values/lesson you have learnt from the above question?View Answer play_arrow
question_answer196) Decomposition of organic matter yields gas, which has higher thermal efficiency in comparison to kerosene, dung cake and charcoal. Biogas plants are set up at municipal, cooperative and individual levels. The plants using cattle dung are known as 'Gobar gas plants' in rural India. These provide twin benefits to the farmer in the form of energy and unproved quality of manure. Read the above passage and answer the following questions (a) What are Gobar gas plants? What are three levels on which they are set up ? (b) What are the benefits of Gobar gas plants? (c) What values/lesson you have learnt from the above passage?View Answer play_arrow
question_answer199) (a) Explain the need for conserving our mineral resources. Give three methods of conserving mineral resources. Or Why do we need to conserve mineral resources? Or Explain three measures to be followed for the conservation of minerals. (b) What values you have learnt from the above question?View Answer play_arrow
question_answer202) Answer the following questions in about 30 words. (a) Distinguish between the following in not more than 30 words. (i) Ferrous and non-ferrous minerals (ii) Conventional and non- conventional sources of energy (b) What is a mineral? (c) How are minerals form in igneous and metamorphic rocks? (d) Why do we need to conserve mineral resources?View Answer play_arrow
question_answer212) On the given political map, locate, mark and label the following with appropriate symbols. (i) Iron ore mine in Western Ghats exporting the ore. (ii) The state with the highest bauxite production in India. (iii) The only nuclear power plant in Uttar Pradesh.View Answer play_arrow
question_answer213) (a) Identify and label the following marked on the Political map of India (i) An oil field (ii) A coal mine (b) On the map, locate, mark and label the existing nuclear power plant in Maharashtra.View Answer play_arrow
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