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Revision Notes

Thermal Energy — Revision Notes

NIOS · Class 10 · Science & Tech

Thermal Energy revision notes for NIOS Class 10 Science & Tech: 4 topics in quick points. Part of the NIOS Class 10 Science & Tech syllabus.

41 questions40 flashcards7 formulas & key relations5 concepts

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An infographic clearly distinguishing between heat (a form of energy, measured in Joules) and temperature (degree of hotness/coldness, determining heat flow direction, measured in Celsius, Fahrenheit,
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Key Topics to Revise

1

Heat and Temperature

  • Thermal energy is a form of energy and its SI unit is joule (J).
  • Heat can do work; steam engines used this property to convert heat energy into mechanical work.
  • Work done against friction is always converted into heat.
2

Thermometers and Temperature Scales

  • Clinical thermometer is used by doctors to measure human body temperature.
  • Laboratory thermometer is used in science experiments.
  • Maximum-minimum thermometer is used by meteorologists to find daily maximum and minimum temperature.
3

Latent Heat and Change of State

  • When a substance changes state, its temperature remains constant during the change.
  • Melting point is the constant temperature at which a solid changes into liquid.
  • Boiling point is the constant temperature at which a liquid changes into vapour.
4

Thermal Expansion

  • Every material except water expands on heating from 0°C to 4°C.
  • Water is an exception because it contracts on heating from 0°C to 4°C.
  • Thermal expansion is the increase in size of a body on heating.

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Full Notes

Key Concepts

Heat is a form of energyJClinical thermometers measure body temperatureThe relation among the three scalesWhen a substance changes state

Frequently Asked Questions

What are the important topics in Thermal Energy for NIOS Class 10 Science & Tech?
Key topics in Thermal Energy include Heat and Temperature, Thermometers and Temperature Scales, Latent Heat and Change of State, Thermal Expansion. Study these first, then practise questions on each for the NIOS Class 10 board exam.
How should I revise Thermal Energy for the NIOS Class 10 board exam?
Learn the core ideas first, then work through the 41 practice questions on Thermal Energy. 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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