1) The height of atmosphere is about a) 1000 Km b) 1000 m c) 1000 mb d) 13 Km 2) Atmospheric pressure is the ...........of air column a) mass b) weight c) volume d) density 3) The normal atmospheric pressure equals ........... mb a) 76 b) 1013.25 c) 1015.13 d) 760 4) The weather phenomena like rains wind cloud present in a) mesosphere b) stratosphere c) thermosphere d) troposphere 5) Water vapor ............the Earth temperature a) organize b) decrease c) increase d) has no effect 6) The region between stratosphere and the mesosphere  a) Thermospause   b) Mesosphere  c) stratospause d) tropopause 7) Ozone layer found in .........layer a) Troposphere b) stratosphere c) mesosphere d) thermosphere 8) The air moves ..........in stratosphere a) horizontally b) vertically c) inclined d) up and down 9) The coldest layer in the atmosphere is a) troposphere b) startosphere c) mesosphere d) thermosphere 10) The hottest layer in the atmosphere is a) troposphere b) stratosphere c) mesosphere d) thermosphere  11) Ionosphere surrounded by .........belts a) electric b) magnetic c) ionic d) thermal 12) atmosphere is inserted into the outer space in ..........layer a) exosphere b) ionosphere c) thermosphere d) stratosphere 13) device used by pilots to measure elevation of aeroplane above sea level  a) aneriod b) satellite  c) altimeter  d) no correct answer 14) Ozone degree measured in ...........unit a) Newton b) Edeson c) Watson d) Dobson 15) One dobson unit equals ..........mm a) 3 b) 0.1 c) 0.01 d) 1 16) Ozone layer allow 100% of ..........rays to penetrate the Earth a) far b) medium c) near d) near and medium  17) Ozone hole appears above .......... a) North pole b) South pole c) equator d) middle east 18) ..............Compounds known as freon a) halons b) nitrogen oxide c) hydrocarbon  d) chlorofluorocarbon 19) .............is used in extinguishing fires a) Methyl bromide b) Halons  c) Nitrogen oxide  d) UV rays 20) ..............is used as an insecticides to preserve the agriculture crops a) Halons b) Methyle bromide  c) Freon d) Nitrogen oxide 21) ..........radiation has great heat effect a) Infrared b) Ultraviolet c) Visible light d) No correct 22) ..........among extinct animals due to melting of ice at the two poles a) Gray bear  b) blue whale c) panda bear d) Polar bear  23) green house gas a) Nitrogen oxide b) water vapour c) freon d) halons 24) The odd word is a) Fluorine b) carbon c) oxygen d) chlorine

Unit 2 Revision .Science 2nd prep

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