1) All the interacting organisms in an area together with the non-living constituents of the environment forms a/an a) Ecosystem b) Bio system  c) Solar system d) Environment system 2) The green plants in a terrestrial ecosystem capture about________percent of the energy from the sunlight that falls on their leaves. a) 99 b) 1 c) 10 d) 100 3) What shields the surface of the earth from UV radiation a) Oxygen b) Ozone c) Troposphere d) Stratosphere 4) Causes for depletion of ozone  a) CFCs b) Air pollution c) Both a and b 5) Example of biodegradable substances a) Rubber b) Polythene c) Wood d) Plastic 6) Full form of CFC a) Chloroform b) Chloroflurocents  c) Chloroflucarbons d) Chlorofluorocarbons 7) Full form of UNEP a) United Nations electronic progress b) United Nations environment programme c) United Nations environment progress d) United Nations environment protocol 8) What is the missing word { sunlight---producers---_________---carnivores---top carnivores  a) Lion b) Second trophic level c) Herbivores d) Plants 9) Effects of UV rays a) May cause cancer b) May cause cataract c) May cause wrinkling of skin d) All of the options 10) Identify the environment-friendly activities a) Carrying cloth bag to put purchases in while shopping b) Riding the car instead of walking to the school c) Swiching on unnecessary lights, AC when not required d) All of the options

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