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The World of Metals and Non-metals

CBSE · Class 7 · Science

Quick revision notes for The World of Metals and Non-metals — CBSE Class 7 Science. Key concepts, formulas, and definitions for last-minute revision.

38 questions76 flashcards5 concepts

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Key Topics to Revise

1

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.
2

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?
The World of Metals and Non-metals covers several key topics that are frequently asked in CBSE Class 7 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in The World of Metals and Non-metals — CBSE Class 7 Science?
Understand the core concepts first, then work through the 38 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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