Question

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question 7 of 20 :
select the best answer for the question.

1. what are the two gases that escaped earth’s atmosphere during early formation?

a. helium and oxygen
b. hydrogen and nitrogen
c. hydrogen and helium
d. helium and nitrogen
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Explanation:

During Earth's early formation, the lightest gases, hydrogen and helium, were able to escape the planet's gravitational pull because of their low molecular weights and the relatively low gravitational force of the early Earth. Oxygen, nitrogen are either heavier or were not in a state to escape as easily in the early stages compared to hydrogen and helium. So the two gases that escaped are hydrogen and helium.

Answer:

C. Hydrogen and helium