1) ecosystem consist of a) biotic components b) abiotic component c) both d) none of these 2) what are abiotic component in ecosystem a) living components b) non living components c) both d) none of these 3) what are biotic component in ecosystem a) living component b) nonliving component c) both d) none of these 4) out of these which are examples of biotic component a) plants b) animals c) insects and birds d) all of these 5) out of these which are examples of abiotic component a) temperature b) soil c) minerals d) all of these 6) example of producers a) plants b) animals c) birds d) insects 7) example of consumer a) animals b) humans c) birds d) all of these 8) what are herbivore a) those feed on flesh b) those feed on plants c) those feed on both plants and animals d) none of these 9) what are carnivore a) those feed on flesh b) those feed on plants c) those feed on both plants and animals d) none of these 10) what are omnivore a) those feed on flesh b) those feed on plants c) those feed on both plants and animal d) none of these 11) an example of food chain is a) grass, goat, human b) goat,grass,eagle c) human,milk,rice d) snake,insect,grass 12) what is food web a) only 1foodchain b) more than 2 food chains c) more than 2 food chain intermingled d) none of these 13) at each trophic level what amount of energy is consumed a) 10% b) 20% c) 30% d) 40% 14) what is the role of decomposers in ecosystem a) decomposition of dead material b) feeding on plants c) feeding on flesh d) none of these 15) which protective layer of gas is in the atmosphere a) ozone layer b) oxygen layer c) hydrogen layer d) nitrogen layer 16) what are the cause of ozone layer depletion a) use of cfc b) green house gases c) both d) none of these 17) what are biodegradable waste a) vegetable waste b) plant waste c) garden waste d) all of these 18) what are nonbiodegradable waste a) plastic bag b) electronic waste c) both d) none of these 19) ozone layer helps us by a) absorbing UV rays b) absorbing moisture c) both d) none of these 20) what affects our environment a) plant activities b) animal activities c) human activities d) all of these

class 10 science our environment

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