Air is essential for all living beings. It supports life on earth. It is utilized by all the living organisms like plants, animals and microorganisms.Air is present everywhere on earth.

Atmosphere : 

Atmosphere is a thin layer of air surrounding the earth. The atmosphere is dense at the surface of the earth and becomes thinner as one moves up.The movement of air is called breeze or wind depending on its velocity or speed. 

Must Read : Air Pressure

Properties of air:

  • Transparent
  • Colourless
  • Occupies space

Components of air:

  • Nitrogen
  • Oxygen
  • Carbon dioxide
  • Water vapour
  • Smoke and dust particles

Nitrogen

  • Is the major component of air
  • Does not support burning

Oxygen:

  • Is the second largest component present in air
  • Supports burning
  • Helps in respiration process.

Smoke and Dust:

  • Present in minute amounts
  • Harmful to living organisms.


Oxygen is used by all living organisms in the process of respiration. They give out carbon dioxide to the environment. 

Carbon dioxide present in air is used by plants in the process of photosynthesis. They give out oxygen as a by-product.


With our free PDF notes you can get success in any competitive or entrance exams like CTET 2014,  KVS, NET, CAT, MAT, CMAT, SSC, B.ED, IBPS Recruitment, IAS, CSAT, State Civil Services Exams, UPTET, PSTET, HTET & more. It also provides NCERT solutions, CBSE notes, NTSE, Olympiad study material, Indian General Knowledge, English Grammar, Mathematics Tricks, Current affairs, Science, S.ST, model test papers, important Question, सी टी टी  नोट्स, Child Development & pedagogy in Hindi Medium.

Post a Comment Blogger

 
Top