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Types of Matter Solids: Shapes and Particles

Aug 20, 2022

Key Concepts

  • Solids 
  • Shapes 
  • Particles 

Introduction and Explanation: 

When we enter any room, we see lots of things which are of different shapes and different types.  

different shapes and different types in a room

Identify all the different shapes from this picture and understand how did they get their shape. 

The wall clock is circular. 

A blackboard is rectangular. 

Each object has different shapes, called solids. 



  • Solid is a substance that has its own shape and size.     
different shapes
  • The particle in it cannot move freely as it is closely packed.   
  • Solids have tiny particles.  
  • Solids can attain their shape when particles are closely packed and there should be no free spaces between the particles. 



Take an apple and a knife. 

apple and a knife. 

As the apple is solid and to the apple, we need another solid object: a knife. 

apple and a knife. 

So, solids will be used with solid objects only. 

Now list down all the solids that you see around you: 



  • Solids have definite shapes and sizes.
  • In solids, particles are tightly packed.
  •  Particles in the objects are very free.
  • Few examples of solids: Bag, Chair etc.


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