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Air is a natural resource. It is the mixture of gases, water vapours and dust particles.
uses:
1. air contains oxygen thats supports life on earth.
2. air helps in burning or combustion.
3. moving air or wind helps to propell sailboats.
4.compressed air is used to fill in rubber tyres.
5.carbon dioxide present in air helps plants to prepare their food, by photosynthesis.
properties:
1. air exerts pressure. for eg-
2. air has mass
3. occupies volume
4. it is compressible
5. it is the gaseous form of matter
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