CBSE · Class 7 · Science · Chapter 4

The World of Metals and Non-metals

Compare metals and non-metals through their physical properties, reactions, uses and behaviour in different conditions.

6 lessons 40 min
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Lessons in this chapter

  1. 1How Metals Look and Take ShapeDiscover how observable properties help us recognise metals and shape them into useful objects.
  2. 2How Materials Sound and Conduct EnergyUse sound, heat transfer, and a simple circuit to explain why different materials suit different jobs.
  3. 3Why Iron RustsUse a controlled investigation to explain rusting, corrosion, and ways to protect iron.
  4. 4How Metals React with OxygenFollow magnesium from a bright-burning metal to a basic product, and compare it with reactive sodium.
  5. 5Non-metals, Elements, and Everyday UsesCompare sulfur with metals and discover why non-metals are essential to life and technology.
  6. 6Chapter Summary and PracticeConnect the chapter’s properties, reactions, investigations, and material choices through mixed revision and practice.
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