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Energy

ICSE · Class 10 · Environmental Science

Quick revision notes for Energy — ICSE Class 10 Environmental Science. Key concepts, formulas, and definitions for last-minute revision.

51 questions48 flashcards5 concepts

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Key Topics to Revise

1

Fossil Fuels and Electricity Generation

  • Fossil fuels were formed by decomposition and alteration of remains of plants and animals over millions of years without oxygen.
  • Large plants became coal; small plants and animals became petroleum and natural gas.
  • Coal, petroleum and natural gas are non-renewable sources of energy.
2

Nuclear Energy

  • Nuclear power or nuclear energy uses exothermic nuclear processes to generate useful heat and electricity.
  • Radioactive atoms emit radiation.
  • Nuclear fission is an exothermic nuclear reaction in which heavy atoms such as Uranium-238 split into fast moving light elements called fission products.
3

Safety Concerns and Nuclear Disasters

  • All nuclear explosions release 5% radioactive strontium-90.
  • Strontium-90 causes pollution of air, water and soil.
  • Strontium-90 replaces calcium in plants, animals and human bones and causes bone cancer and tissue degeneration.
4

Renewable Energy Sources

  • Renewable sources of energy produce energy over and over again.
  • Examples of renewable energy sources are biogas, solar energy, wind energy, energy from falling water, energy from waste and tidal energy.
  • Solar, wind, hydro and geothermal power are renewable because they are replenished by physical means.

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Full Notes

Key Concepts

Fossil fuels were formed fromRenewable sources produce energy repeatedlyElectricity is commonly generated by fossilNuclear energy comes from radioactive decayNuclear fission is an exothermic reaction

Frequently Asked Questions

What are the important topics in Energy for ICSE Class 10 Environmental Science?
Energy covers several key topics that are frequently asked in ICSE Class 10 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Energy — ICSE Class 10 Environmental Science?
Understand the core concepts first, then work through the 51 practice questions available for this chapter. Revise formulas and 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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All 10 chapters — ICSE Class 10 Environmental Science Revision Notes

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