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Heat Transfer in Nature — Revision Notes

CBSE · Class 7 · Science

Heat Transfer in Nature revision notes for CBSE Class 7 Science: 4 topics in quick points. Part of the CBSE Class 7 Science syllabus.

44 questions78 flashcards5 concepts

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Key Topics to Revise

1

1. Conduction of Heat

  • Conduction is heat transfer from the hotter part of an object to the colder part without particle displacement.
  • In solids, heat transfer takes place mainly through conduction.
  • The pin closest to the candle flame falls first, in order I, II, III, IV.
2

2. Convection of Heat

  • Convection is heat transfer by the actual movement of liquid or gas particles.
  • Heated air expands, becomes lighter, and rises.
  • Cooler air moves down to take its place.
3

3. Radiation of Heat

  • Radiation is heat transfer that does not require any medium.
  • Heat from the Sun reaches Earth by radiation.
  • Heat from fire also reaches nearby people by radiation.
4

4. Heat Transfer in Daily Life

  • Heating water in a pan involves all three heat transfer processes together: conduction from flame to utensil, convection in water, and radiation from the flame and hot utensil.
  • Wet clothes dry faster on sunny days because heat from the Sun speeds up evaporation.
  • The principles of heat transfer are used in clothing, cooking utensils, and house design.

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Full Notes

Key Concepts

Conduction is heat transfer fromMetals such as aluminiumAir is a poor conductorConvection is heat transfer bySoil heats up faster than water

Frequently Asked Questions

What are the important topics in Heat Transfer in Nature for CBSE Class 7 Science?
Key topics in Heat Transfer in Nature include Conduction of Heat, Convection of Heat, Radiation of Heat, Heat Transfer in Daily Life. Study these first, then practise questions on each for Class 7 exams.
How should I revise Heat Transfer in Nature for Class 7 exams?
Learn the core ideas first, then work through the 44 practice questions on Heat Transfer in Nature. Revise definitions regularly and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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