NCERT/Class 10/Science/Our Environment

Our Environment

Class 10 · Science

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Sample Questions

Q1.The energy available at each trophic level gets diminished progressively because:

  • AOrganisms at higher levels eat less
  • BEnergy is lost as heat during life processes at each level
  • CSunlight decreases as it goes through trophic levels
  • DDecomposers remove energy from each level

Q2.At which trophic level is the concentration of harmful chemicals highest during biological magnification?

  • AProducers (first trophic level)
  • BPrimary consumers (second trophic level)
  • CSecondary consumers (third trophic level)
  • DTop consumers at the highest trophic level

Q3.Why is the ozone layer described as having a 'dynamic equilibrium' in its natural state?

  • AOzone is continuously produced and destroyed at equal rates under natural UV radiation
  • BThe ozone layer moves up and down in the atmosphere
  • COzone molecules are stationary and never change
  • DUV radiation creates more ozone than is destroyed naturally

Q4.The flow of energy in an ecosystem is:

  • ABidirectional
  • BCyclic
  • CUnidirectional
  • DMultidirectional

Q5.What is a food chain?

  • AA chain used to lock food storage
  • BA series of organisms where each one feeds on the previous one
  • CA network of decomposers
  • DA group of producers in an ecosystem

Q6.This is a sample question to preview what you'll get in the full practice test...

  • A. Option one
  • B. Option two
  • C. Option three
  • D. Option four
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Concepts Covered

10% lawCFC mechanismCFC regulationCFCsCO2DDTDNA damageLindemanMontreal ProtocolUNEPUV radiationabiotic componentsaccumulationagricultureapex predatorsaquariumaquatic ecosystemaquatic food chainartificial ecosystematmosphereautotrophsbacteriabiodegradabilitybiodegradablebiodegradable alternativesbiodegradable wastebiodiversitybiodiversity conservationbiological magnificationbiomagnificationbiomagnification factorbiomassbiomass pyramidbiotic componentscalculationcarbon cyclecarnivoreschemical accumulationchemical formulachemical reactionchlorine catalysisclimate changeconcentration gradientconsumer cultureconsumersdecomposersdecompositiondecomposition limitsdigestiondroughtdynamic equilibriume-wasteecological consequencesecological energeticsecological pyramidecosystemecosystem balanceecosystem collapseecosystem complexityecosystem principlesecosystem regulationecosystem restorationecosystem stabilityecosystem typesenergy calculationenergy captureenergy efficiencyenergy flowenergy lossenergy transferentropyenvironmental conservationenvironmental factorsenvironmental impactenvironmental managementenvironmental policyenvironmental problemsenvironmental trade-offsenvironmental tradeoffsenzyme actionenzyme specificityeutrophicationextended producer responsibilityfat accumulationfeeding relationshipsfood chainfood chain lengthfood chainsfood productionfood safetyfood securityfood webfood web disruptionfungigreenhouse gaseshazardous materialshealth effectsheat dissipationherbivoreshuman activitieshuman impacthumansinorganic substancesintegrated pest managementinterdependenceinvasive speciesinverted pyramidirreplaceable functionland uselife on Earthlifecyclelipophilic chemicalslong-term consequencesmagnification factormarine ecosystemmatter cyclingmethanemicroplasticsmonoculturemultiple exposurenatural ecosystemnon-biodegradablenon-biodegradable wastenutrient cyclingomnivoresorganic farmingorganochlorine pesticidesozoneozone depletionozone destructionozone formationozone holeozone layerozone protectionpaper vs plasticparasitespesticidesphotosynthesisphotosynthesis efficiencyphytoplanktonplasticplastic recyclingplasticspolicypond ecosystempopulation viabilityprimary consumersprimary productivityproblem-solvingproducersproductivityreduce reuse recycleseasonal variationsecond law of thermodynamicssecondary consumersself-sustainingsewage treatmentsoil biodiversitysoil fertilitysolar energystratospheresustainabilitysustainable agriculturesustainable developmentsynthetic materialstertiary consumertertiary consumersthermodynamicstop consumerstop predatorstop-down regulationtoxicologytrophic cascadetrophic levelsunidirectionalvegetarianismwastewaste classificationwaste generationwaste managementwaste segregationwater pollutionzero waste

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