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Matter and its states:
• Matter is anything that have definite mass, occupies space, can exert pressure, can produce physical resistance and whose existence can be felt by any of our sense organ.
• It is present everywhere in form of different states which we will be studying further . The example can be air and water, sand and sugar, iron and wood , oxygen and hydrogen, milk and oil ,rocks and minerals etc.
• The matter is divided into two categories on the basis of composition:
1. Physical composition = solid, liquid, gas, plasma.
2. Chemical composition = element, compound, mixture.
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