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NCERT Solutions for Class 6th Science Chapter 11 Nature’s Treasures

Updated on 2026-09-19

About this chapter

Everything we get from nature and use is a natural resource — air, water, energy from the Sun, forests, soil, rocks, minerals and fossil fuels. Things people make out of them (bulbs, furniture, solar panels, bicycles) are human-made resources . Air is a mixture of gases: about 78% nitrogen, 21% oxygen and 1% argon, carbon dioxide and other gases . Moving air is wind , and wind farms such as Muppandal (Tamil Nadu), Jaisalmer (Rajasthan) and Brahmanvel (Maharashtra) turn it into electricity. Water covers about two-thirds of the Earth , but most of it is salty ocean water. Only a tiny part of the freshwater in ponds, rivers, lakes and wells is easy to reach — so water must be used with care, and rainwater harvesting (bawadi in Rajasthan, vav in Gujarat) is an age-old Indian answer to scarcity

  • Chapter opening
  • .1 Air
  • .2 Water
  • .3 Energy from the Sun
  • .3
  • .4 Forests
  • .5 Soil, Rocks and Minerals
  • .5
  • .5 / 11.6
  • .6 Fossil Fuels
Quick revision
TermWhat it meansExamples from the chapterPage
Natural resourceAnything we get from nature and use to live or to make thingsAir, water, sunlight, forests, soil, rocks, minerals, fossil fuels223
Human-made resourceA thing created by people using natural resourcesElectric bulb, furniture, solar panel, bicycle223 – 224
Renewable resourceA resource that is renewed, replenished or restored within a reasonable periodAir, water, forests224
Non-renewable resourceA resource present in limited quantity that is not replenished in a reasonable periodMinerals, soil, rocks, coal, petroleum, natural gas224
AirThe mixture of gases surrounding the EarthNitrogen 78%, oxygen 21%, argon + carbon dioxide + others 1%209
WindMoving air — gentle as a breeze, fast in a stormTurns a firki; turns the wings of a windmill209 – 210
FreshwaterWater that is not salty, fit for drinking, farming and industryRivers, lakes, ponds, wells, ice sheets, groundwater211 – 212
Rainwater harvestingCollecting and storing rainwater in large quantity for later useRooftop harvesting; Bawadi in Rajasthan, Vav in Gujarat213
ForestA large area with dense growth of many types of plantsThe Western Ghats forest near Ajji’s village216
SoilFormed by disintegration of rocks by the Sun, water and living organisms over thousands of yearsFarm soil, forest soil, brick-making soil219 – 220
Rocks and mineralsRocks are natural solids made of minerals; metals are extracted from mineralsGranite, sandstone, marble, slate, laterite; gold, silver, copper, cobalt220 – 221
Fossil fuelsFuels formed over millions of years from the buried remains of microorganisms and plantsCoal, petroleum (petrol, diesel, kerosene), natural gas (CNG), LPG222
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Exercises

  1. Chapter opening — In-text Questions Page 207
  2. .1 Air — Activity 11.1: Let us experience Page 20811
  3. .1 Air — In-text Questions Page 20911
  4. .1 Air — Activity 11.2: Let us make and decorate Page 21011
  5. .1 Air — More to know! Page 21011
  6. .2 Water — In-text Questions Page 21111
  7. .2 Water — In-text Questions Page 21211
  8. .2 Water — Activity 11.3: Let us find out Page 21211
  9. .2 Water — In-text Questions Page 21311
  10. .3 Energy from the Sun — In-text Questions Page 21411
  11. .3 — In-text Questions Page 21511
  12. .3 — In-text Questions Page 21611
  13. .4 Forests — In-text Questions Page 21711
  14. .5 Soil, Rocks and Minerals — Activity 11.4: Let us investigate Page 218 & 21911
  15. .5 — In-text Questions Page 21911
  16. .5 — In-text Questions Page 22011
  17. .5 / 11.6 — In-text Questions Page 22111
  18. .6 Fossil Fuels — Activity 11.5: Let us conduct a survey Page 22211
  19. .6 — In-text Questions Page 22211
  20. .6 — In-text Questions Page 22311
  21. .8 Resources We Use — In-text Questions Page 22411
  22. .8 — Activity 11.6: Let us make a list of natural resources used Page 22511
  23. Chapter exercise — Let us enhance our learning Page 227 – 229
  24. Projects and further exploration — Learning further Page 229 & 230
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