1) A dangerous activity which results in many deaths due to gas explosion, caves in and flooding is a. coal mining b. climbing mountain c. extracting oil d. hydropower generation
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2) Solar cells and solar furnaces are a. cheap b. expensive c. free d. reasonable
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3) For heating, the more suitable flame is a. luminous flame b. non luminous flame c. bright flame d. dull flame
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4) Almost every resource of earth's energy can be traced back to a. sun b. moon c. earth d. plants
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5) A moving car releases energy during process of burning a. petrol b. water c. diesel d. coal
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6) Due to constant heat and pressure, buried plants turn in to a. wood b. coal c. fertilizer d. oil
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7) Living things are source of a. fossils fuel b. bio mass c. both a and b d. coal
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8) Atomic number of 'Zinc' is a. 10 b. 20 c. 30 d. 40
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9) The need and demand of fossils fuel can be reduced by a. conserving energy b. storing energy c. utilizing energy d. transforming energy
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10) Toxic air pollutants like sulphur dioxide and nitrogen oxides are produced by burning a. coal b. oil c. gases d. both a and b
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