Matter

• Matter is anything that has mass and takes up space.All matter is made up of small particles called atoms. It is the smallest part of a matter
•  States of Matter 
• Solid 
  
• The particles (ions, atoms or molecules) are tightly packed
• Strong force of attraction between the particles.So they can not move freely but can only vibrate. As a result, the solid has a definite shape and  volume.
• Slightly compressible 
• Liquid
• Particles are closely packed but able to flow.
• Intermolecular forces are weaker than solids but stronger than that of gases.
• There is much space in between the molecules of liquids so they flow and take the shape of the container.
• Slightly Compressible 
• Gas
• The intermolecular forces experienced between them are negligible.
• Gases do not have any fixed shape or volume.
• Highly compressible 
• Changes of State 
• A physical change in a matter. 
• They are reversible changes.
• Melting, freezing, sublimation,deposition,
• condensation and vaporization are the 
• common changes of state.
•