Use the following choices to answer the atmosphere composition questions:
-Which best describes the composition of the atmosphere of Earth?

Question

Quizplus · Accepted Answer

The atmosphere of Earth is composed mostly of molecular nitrogen (about 78%) and molecular oxygen (about 21%) with trace amounts of other gases, including carbon dioxide, neon, helium, methane, krypton, hydrogen, and xenon.

Answer: B
 Individual atoms, such as sodium and potassium, are not a significant component of the Earth's atmosphere. The atmosphere is primarily composed of molecules, not individual atoms.

Answer: D
 Molecular oxygen is not the most abundant gas in Earth's atmosphere, and it makes up only about 21% of the air we breathe. Molecular nitrogen is actually the most abundant gas, making up about 78% of the atmosphere, with the remaining 1% consisting of other gases such as carbon dioxide and neon.

Answer: E
 Methane and carbon dioxide are greenhouse gases that make up only a small fraction of the atmosphere (less than 1%). The atmosphere is primarily composed of molecular nitrogen and molecular oxygen, with trace amounts of other gases.

Use the Following Choices to Answer the Atmosphere Composition Questions