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Major Domains of the Earth — Social Science STD 6 — Question

Rajasthan BoardEnglish MediumSTD 6Social ScienceMajor Domains of the Earth5 Marks
Question
Explain the Composition of the Atmosphere.
✓

Answer

Composition of the Atmosphere:
  1. Atmosphere is composed mainly of nitrogen and oxygen.
  2. They both make up about 99% of clean, dry air (Nitrogen 78%; Oxygen 21%).
  3. Other gases like Carbon-dioxide; argon and others comprise 1% by volume.
  4. Oxygen is the breath of life while nitrogen helps in the growth of living organisms.
  5. Carbon-dioxide is present in the air in minute amount but is very important.
  6. It absorbs heat radiated by the earth and keeps the surface of the earth warm.

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