Crossword Puzzle

Subject Enrichment Activity


  1. Cutting of wood is physical and ____________ change. (irreversible)
  2. Some materials _____________ on cooling. (contract)
  3. Burning of match stick is a _____________ change. (fast)
  4. Which metal is used in thermometer? (mercury)


  1. A change in which no new substance is formed. (physical)
  2. The changes that take place by absorption of heat. (endothermic)
  3. Changes that we do not want to take place. (undesirable)
  4. Rusting of iron is undesirable as well as _________ change. (chemical)
  5. Changes that take place in nature. (natural)


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