Out of the following gases which one makes about 1/5th of the atmosphere?Group of answer choicesoxygencarbon dioxidesulfer dioxideheliumnitrogen

Breakdown of the Problem

1. Identify the composition of the Earth's atmosphere.
2. Determine the proportion of each gas listed in the options.

Relevant Concepts

• The Earth's atmosphere is composed primarily of nitrogen and oxygen, along with trace amounts of other gases.
• Specifically, nitrogen makes up about 78% and oxygen about 21% of the atmosphere.

Analysis and Detail

1. Oxygen: Approximately 21% or about 1/5th of the atmosphere.
2. Carbon Dioxide: Less than 0.04% of the atmosphere.
3. Sulfur Dioxide: Present in trace amounts, typically negligible in percentage.
4. Helium: Trace gas, less than 0.0005%.
5. Nitrogen: Makes up about 78% of the atmosphere.

Verify and Summarize

Out of the gases listed, oxygen is the one that comprises approximately 1/5th of the atmosphere. The other gases either represent much smaller fractions or are negligible.

Final Answer

Oxygen makes about 1/5th of the atmosphere.