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The World of Metals and Non-metals — Revision Notes

CBSE · Class 7 · Science

The World of Metals and Non-metals revision notes for CBSE Class 7 Science: 4 topics in quick points. Part of the CBSE Class 7 Science syllabus.

38 questions76 flashcards5 concepts

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Key Topics to Revise

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1. Identifying Metals and Non-metals

  • Metals such as copper, aluminium, and iron are lustrous and hard.
  • Lustre shown by metals is called metallic lustre.
  • Non-metals such as coal, sulfur, and wood are non-lustrous and not as hard as metals.
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2. Important Properties of Metals

  • Metals are generally hard, lustrous, malleable, ductile, and sonorous.
  • The property of being beaten into thin sheets is called malleability.
  • Gold and silver are the most malleable metals.
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3. Important Properties of Non-metals

  • Non-metals are usually soft, dull, brittle, and poor conductors of heat and electricity.
  • Non-metals are neither malleable nor ductile.
  • Non-metals are not sonorous.
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4. Behaviour of Metals and Non-metals with Heat, Electricity, Air, and Water

  • Metals are good conductors of heat, while wood is a poor conductor of heat.
  • Metals such as aluminium, iron, and copper are good conductors of electricity.
  • Sulfur, coal, wood, stone, eraser, and nylon rope are poor conductors of electricity.

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Full Notes

Key Concepts

CopperMalleability is the property byDuctility is the property bySonority is the property byConduction is the transfer of heat

Frequently Asked Questions

What are the important topics in The World of Metals and Non-metals for CBSE Class 7 Science?
Key topics in The World of Metals and Non-metals include Identifying Metals and Non-metals, Important Properties of Metals, Important Properties of Non-metals, Behaviour of Metals and Non-metals with Heat, Electricity, Air, and Water. Study these first, then practise questions on each for Class 7 exams.
How should I revise The World of Metals and Non-metals for Class 7 exams?
Learn the core ideas first, then work through the 38 practice questions on The World of Metals and Non-metals. 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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