CBSE Class 8 Science Chapter 7 Revision Notes

Chapter 7: Conservation Of Plants And Animals Revision Notes

Clearing forests (natural and human-driven) and using that land for other purposes is called deforestation.

Droughts and desertification are the results of desertification.



  • Biodiversity is the assortment of animals, plants, fungi, and even microbes such as bacteria that constitute our natural environment.

  • These organisms work together in ecosystems to preserve, balance, and support life.

  • The terms wildlife sanctuary, national park, and biosphere reserve are used to describe places dedicated to forest and wild animal conservation and preservation.

Places Characteristics Examples
Wildlife Sanctuary
  • Killing (poaching) or capturing animals, in general, is strictly prohibited and punishable by law
  • People living in wildlife sanctuaries are allowed to graze their livestock, and collect medicinal plants, and firewood
Pachmarhi Wildlife Sanctuary
National Park
  • Protects whole sets of ecosystems
  • Human activities such as grazing, poaching, hunting, capturing of animals or collection of firewood, medicinal plants, etc. are not allowed
  • Satpura National Park: Indian teak
  • Satpura Tiger Reserve: Project Tiger
Biosphere Reserve Helps in the conservation of biodiversity and the culture of an area Pachmarhi Biosphere Reserve consists of the Satpura national park and the Bori and Pachmarhi wildlife sanctuaries


  • The flora and fauna of a given place are the plants and animals that live there.

  • Endemic species are those plant and animal species that can only be found in a specific location (a zone, a state, or a country).

  • Habitat destruction, population growth, and the introduction of new species may all impact endemic species’ native habitats, putting their survival in danger.

  • Endangered species are living organisms that are on the threshold of extinction.

  • Extinct Species are plant and animal species that have already died out. Especially smaller animals are more at risk.


  • An ecosystem consists of all the plants, animals, and microorganisms that live in a given area and non-living elements like climate, soil, etc.

  • The Red Data Book contains a database of endangered species maintained internationally and at the zone, state, and country levels.

  • Migration is the regular seasonal movement of birds for a specific purpose, such as breeding for a set time each year.

  • To protect forests, power, and water, we should save, reuse, and recycle paper.

  • Reforestation is the process (natural or human-driven) of replanting new trees of the same species in depleted forests.

Source: Chapter-7.pmd (


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