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Substances in the Surroundings – Their States and Properties — Science STD 6 — Question

Maharashtra BoardEnglish MediumSTD 6ScienceSubstances in the Surroundings – Their States and Properties2 Marks
Question
List various uses of changes in physical state.
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Answer

  1. Candles are made by melting paraffin wax.
  2. Solid carbon-dioxide (dry ice) is used to make ice-cream and to keep it frozen.
  3. Liquid nitrogen is used in animal husbandry.
  4. Sand (silica) is melted to make glass.
  5. Metals like gold and silver are melted to make ornaments.
  6. Iron is melted to make tools.

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