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Physical & Chemical Changes | Science Class 5 PDF Download

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 | Science 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 | Science 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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FAQs on Physical & Chemical Changes - Science Class 5

1. What are physical changes?
Ans. Physical changes refer to alterations in the physical properties of a substance, such as its shape, size, or state of matter, without any change in its chemical composition.
2. Give some examples of physical changes.
Ans. Some examples of physical changes include melting ice into water, tearing a piece of paper, or breaking a glass bottle.
3. What are chemical changes?
Ans. Chemical changes occur when the substances involved undergo a chemical reaction, resulting in the formation of new substances with different chemical properties.
4. Can you provide some examples of chemical changes?
Ans. Sure! Examples of chemical changes include burning wood to produce ash and smoke, rusting of iron when exposed to air and moisture, or the digestion of food in our bodies.
5. What is the difference between physical and chemical changes?
Ans. The main difference between physical and chemical changes is that physical changes only affect the physical properties of a substance, while chemical changes involve the formation of new substances with different chemical properties. Physical changes are usually reversible, while chemical changes are often irreversible.
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