Which major constituent of the atmospheres of Venus and Mars is present in only very small amounts in Earth's atmosphere?
A) methane, CH₄
B) carbon dioxide, CO₂
C) nitrogen, N₂
D) oxygen, O₂

Question

Quizplus · Accepted Answer

Carbon dioxide (CO₂) is present in large amounts in the atmospheres of Venus and Mars, but in only small amounts in Earth's atmosphere. Methane (CH₄) is present in small amounts in all three atmospheres, while nitrogen (N₂) and oxygen (O₂) are present in large amounts in Earth's atmosphere but are not major constituents of Venus and Mars atmospheres.

Which Major Constituent of the Atmospheres of Venus and Mars