Class 7 Science Chapter 7, Heat Transfer in Nature, begins on a winter evening in Gangtok as siblings compare Sikkim’s cold climate with warm Kerala and watch thukpa cooking. It explains conduction, convection, radiation, land and sea breezes, and the water cycle with groundwater seepage.
What Class 7 Science Chapter 7 Covers
7.1 Conduction of Heat investigates how heat travels through solids from the hotter end to the colder end without movement of particles, and why cooking utensils have metal bases with wooden or plastic handles.
7.2–7.3 Convection, Land/Sea Breeze & Radiation demonstrates convection currents in liquids and gases (7.2), explains daytime sea breeze and night-time land breeze in coastal regions (7.2.1), and explores heat transfer by radiation without any medium and why light-coloured clothes suit summer while dark clothes suit winter (7.3).
7.4 Water Cycle & Seepage Beneath the Earth connects solar heating to evaporation, transpiration, condensation, precipitation, infiltration/seepage into aquifers, and groundwater recharge (7.4.1).
Exercises in Chapter 7
- In a Nutshell key points summary and Let Us Enhance Our Learning chapter exercises.
- Exploratory Projects and Dive Deeper hands-on science activities.
Read Class 7 Science Chapter 7 Online
More Chapters
- Previous: Chapter 6: Adolescence: A Stage of Growth and Change
- Next: Chapter 8: Measurement of Time and Motion
- Hindi medium: Class 7 Science Chapter 7 PDF in Hindi (Jigyasa)
- All Science chapters and the other Class 7 books: Class 7 NCERT books 2026-27
- All Class 1 to 12 NCERT Textbooks: NCERT Books PDF (Class 1–12)
FAQ
What is the difference between conduction, convection, and radiation?
Conduction transfers heat through direct contact in solids; convection transfers heat by the actual movement of heated particles in liquids and gases; radiation transfers heat without requiring any medium.
Why do coastal areas experience sea breeze during the day and land breeze at night?
During the day, land heats up faster than the sea, so warm air over land rises and cool air from the sea rushes in (sea breeze). At night, land cools faster than the sea, so cooler air from land moves toward the warmer sea (land breeze).