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Changes Around Us


  • Changes may occur either:
    • by heating substances 
    • or by mixing it with some other.
  • Expansion
    • When we heat the metal it expands.
  • Contraction
    • When we cool the heated metal then metal gets contracted.
  • Evaporation
    • Liquid to Gases form
  • Melting
    • Solid to liquid forms


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