Geography
What is the atmosphere composed of? Write the names of three impurities found in the atmosphere.
Answer
The atmosphere is composed of gases, water vapour, dust particles and smoke. The gases include nitrogen, oxygen, argon, carbon dioxide, neon, ozone, hydrogen, helium and methane. Nitrogen (78%) and oxygen (21%) are the two main gases while other gases are found in very small quantities. The heavier gases like oxygen, water vapour and dust particles are found in the lower layers of the atmosphere.
Smoke, salts and carbon monoxide are the three impurities found in the atmosphere.
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