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Physical & Chemical Changes - Notes | Study Science Class 5 - Class 5

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Physical Changes 

A physical change is a temporary change that can be reversed. For example, melting of ice, evaporation of water, melting of wax and glowing of a bulb are physical changes as they give us back the original substance.


Physical & Chemical Changes - Notes | Study Science Class 5 - Class 5

Examples: 

  • Boiling, melting, freezing, and shredding
  • Melting of butter, ice cream, wax 
  • Shredding of paper, clothes, etc 
  • Chopping wood

Original material remains same. These changes are in the state of matter and can be reversed easily.

Chemical Changes

A chemical change is a permanent change that cannot be reversed. For example, burning of paper, burning of matchsticks, cooking of food and formation of curd from milk are chemical changes.


Physical & Chemical Changes - Notes | Study Science Class 5 - Class 5

Examples: 

  • Burning, cooking, rusting, and rotting 
  • Burning wood 
  • Souring milk 
  • Cooking an egg 
  • Heating sugar to form caramel 
  • Baking a cake 
  • Rusting of iron

We cannot get original things back when a chemical change occurs in them. A chemical change results from a chemical reaction.

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