Question

What were the gases which initially formed the earth’s atmosphere?
NCERT Solutions for Class 11th Geography Fundamental of Physical Geography Chapter 2 Exercise 2(v)

Answer 1

Initially the earth's atmosphere consisted of hydrogen and helium.

Answer 2

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Hydrogen and Helium

Earth is believed to have formed from gas and dust orbiting the sun. The vast majority of the gas would have been composed of the lighter elements, such as hydrogen and helium. The early Earth had a large amount of hydrogen and helium in the atmosphere and this would have slowly escaped into space due to the low mass of these gases. Today, hydrogen and helium make up less than 1 percent of the Earth's atmosphere.



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