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NCERT Solutions for Curiosity Chapter 12 How Nature Works in Harmony

Updated on 2026-09-05

About this chapter

A habitat is the place that gives an organism the conditions it needs. Its living parts are the biotic components ; air, water, soil, sunlight and temperature are the abiotic components . Organisms of one kind in one place at one time form a population ; the different populations sharing a habitat form a community ; the community together with the abiotic components it interacts with is an ecosystem . Green plants are producers — they alone bring energy into the ecosystem, from sunlight. Consumers pass that energy along, and decomposers break dead matter down and return the nutrients to the soil. A food chain shows who eats whom; because most organisms are eaten by more than one kind of animal, chains link up into a food web . An organism's place in a chain is its trophic level . Energy fl

  • Chapter opener
  • .1 How Do We Experience and Interpret Our Surroundings?
  • .2 Who All Live Together in Nature?
  • –19512.3 Does Every Organism in a Community Matter?
  • .5 Who Eats Whom?
  • .6 What Happens to Waste in Nature?
  • .9 What Are the Benefits of an Ecosystem?
  • .9.2 How do healthy ecosystems serve our farms?
  • –208End-of-chapter questions
  • –209End-of-chapter projects
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Exercises

  1. Chapter opener — Probe and ponder Page 190
  2. .1 How Do We Experience and Interpret Our Surroundings? — Activity 12.1: Let us explore Page 19112
  3. .1 How Do We Experience and Interpret Our Surroundings? — In-text Questions Page 19212
  4. .2 Who All Live Together in Nature? — Activity 12.2: Let us record Page 19312
  5. .2 Who All Live Together in Nature? — In-text Questions Page 19412
  6. –19512.3 Does Every Organism in a Community Matter? — Activity 12.3: Let us read Page 194
  7. .4 What Are the Different Types of Interactions Among Organisms and their Surroundings? — Activity 12.4: Let us relate and identify Page 19612
  8. .4 What Are the Different Types of Interactions Among Organisms and their Surroundings? — In-text Questions Page 19712
  9. –19812.4 What Are the Different Types of Interactions Among Organisms and their Surroundings? — Activity 12.5: Let us classify Page 197
  10. .5 Who Eats Whom? — In-text Questions Page 19812
  11. .5 Who Eats Whom? — Activity 12.6: Let us link (relate) Page 19912
  12. .5 Who Eats Whom? — Activity 12.7: Let us draw Page 19912
  13. .5 Who Eats Whom? — Activity 12.8: Let us trace and link Page 20012
  14. .6 What Happens to Waste in Nature? — In-text Questions Page 20112
  15. .6 What Happens to Waste in Nature? — Ever heard of … Page 20112
  16. .7 How Does One Change Lead to Another? / 12.8 How Do Interactions Maintain Balance in Ecosystems? — In-text Questions Page 20212
  17. .9 What Are the Benefits of an Ecosystem? — In-text Questions Page 20412
  18. .9.1 Human-made ecosystems / 12.9.2 How do healthy ecosystems serve our farms? — In-text Questions Page 20512
  19. .9.2 How do healthy ecosystems serve our farms? — Activity 12.10: Let us survey Page 20512
  20. .9.2 How do healthy ecosystems serve our farms? — In-text Questions Page 20612
  21. –208End-of-chapter questions — Keep the curiosity alive Page 207
  22. –209End-of-chapter projects — Discover, design, and debate Page 208
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