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NCERT Solutions for Class 7th Science Chapter 7 Heat Transfer in Nature

Updated on 2026-09-08

About this chapter

Heat travels from a hotter place to a colder place in three ways — conduction , convection and radiation . Pema and Palden meet all three in one evening: the metal pan on the fire, the smoke rising from the burning wood, and the warmth they feel sitting around the fireplace. In conduction , heat passes from the hotter part of an object to its colder part. A heated particle passes heat on to its neighbour, and so on, but the particles themselves do not move from their positions . This is how heat travels in solids. Materials that let heat pass through them easily — metals such as aluminium, iron and steel — are good conductors of heat . Wood, glass, clay, porcelain, plastic and air are poor conductors (insulators) . Woollen clothes, two thin blankets and hollow bricks all work by trapping a

  • Chapter opener
  • .1 Conduction of Heat
  • .1 Conduction of Heat / 7.2 Convection
  • .2 Convection
  • .2.1 Land and Sea Breeze
  • .3 Radiation
  • .4 Water Cycle
  • .4.1 Seepage of water beneath the Earth
  • Chapter exercises
  • Chapter projects
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Exercises

  1. Chapter opener — In-text Questions Page 89–90
  2. .1 Conduction of Heat — Activity 7.1: Let us experiment Page 907
  3. .1 Conduction of Heat — In-text Questions Page 917
  4. .1 Conduction of Heat / 7.2 Convection — In-text Questions Page 927
  5. .2 Convection — Activity 7.2: Let us investigate Page 92–937
  6. .2 Convection — In-text Questions Page 937
  7. .2 Convection — Activity 7.3: Let us find out Page 93–947
  8. .2 Convection — In-text Question Page 947
  9. .2.1 Land and Sea Breeze — Activity 7.4: Let us investigate Page 94–957
  10. .2.1 Land and Sea Breeze — In-text Question Page 957
  11. .3 Radiation — In-text Questions Page 967
  12. .3 Radiation — Dive Deeper Page 967
  13. .4 Water Cycle — Know a Scientist Page 997
  14. .4.1 Seepage of water beneath the Earth — In-text Question Page 997
  15. .4.1 Seepage of water beneath the Earth — Activity 7.5: Let us investigate Page 997
  16. .4.1 Seepage of water beneath the Earth — In-text Questions Page 1007
  17. .4.1 Seepage of water beneath the Earth — Science and Society Page 1017
  18. Chapter exercises — Let Us Enhance Our Learning Page 102–104
  19. Chapter projects — Exploratory Projects Page 104
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