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Questions and Answers
What are the primary gases in Earth's atmosphere?
What are the primary gases in Earth's atmosphere?
What percentage of Earth's atmosphere is made up of nitrogen?
What percentage of Earth's atmosphere is made up of nitrogen?
78.08
What is the partial pressure of oxygen in dry air?
What is the partial pressure of oxygen in dry air?
21.22
Trace gases make up a significant portion of the atmosphere.
Trace gases make up a significant portion of the atmosphere.
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The partial pressure of nitrogen is calculated using the formula: (percentage of nitrogen) ÷ 100% × 101.32 = _____
The partial pressure of nitrogen is calculated using the formula: (percentage of nitrogen) ÷ 100% × 101.32 = _____
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What are the primary gases in Earth's atmosphere?
What are the primary gases in Earth's atmosphere?
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What is the contribution of nitrogen to the atmosphere by volume?
What is the contribution of nitrogen to the atmosphere by volume?
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What is the partial pressure of oxygen in the atmosphere?
What is the partial pressure of oxygen in the atmosphere?
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The amount of a gas's contribution to total atmospheric pressure is called its ______.
The amount of a gas's contribution to total atmospheric pressure is called its ______.
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Trace gases make up the majority of Earth's atmosphere.
Trace gases make up the majority of Earth's atmosphere.
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What is the volume percentage of Argon in the atmosphere?
What is the volume percentage of Argon in the atmosphere?
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What is the percentage of carbon dioxide in dry air?
What is the percentage of carbon dioxide in dry air?
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Study Notes
Composition of Earth's Atmosphere
- Earth's atmosphere is composed of various gases, primarily nitrogen and oxygen, with trace gases.
- Nitrogen makes up 78.08% of total volume and contributes 79.11 kPa to atmospheric pressure.
- Oxygen makes up 20.95% of total volume and contributes 21.22 kPa to atmospheric pressure.
- Argon makes up 0.93% of total volume and contributes 0.95 kPa to atmospheric pressure.
- Trace gases contribute a small percentage of total volume.
Composition of Dry Air
- Dry air is air that doesn't contain water vapor.
- The partial pressure of each gas in dry air is proportional to its volume percentage.
- For example, the partial pressure of nitrogen is 79.11 kPa, calculated as (78.08 ÷ 100%) × 101.32 kPa.
Trace Gases
- Trace gases include carbon dioxide, neon, helium, and methane.
- Carbon dioxide makes up 0.04% of total volume.
- Neon makes up 0.0018% of total volume.
- Helium makes up 0.0005% of total volume.
- Methane makes up 0.00017% of total volume.
Earth's Atmosphere Composition
- The Earth's atmosphere is made up of various gases, primarily nitrogen and oxygen.
- Trace gases make up a smaller portion of the atmosphere.
- Each gas contributes to the total atmospheric pressure, known as partial pressure.
Composition of Dry Air
- Dry air, devoid of water vapor, is predominantly composed of Nitrogen (78.08% by volume), followed by Oxygen (20.95% by volume).
- Argon makes up a smaller percentage at 0.93%.
- Carbon dioxide, a trace gas, contributes to 0.04% of the air volume.
Partial Pressure
- The partial pressure of a gas is proportional to the gas's percentage of the total volume.
- For instance, nitrogen contributes 79.11 kPa to the total atmospheric pressure, which is calculated by multiplying its volume percentage (78.08%) by the total atmospheric pressure (101.32 kPa).
- Carbon dioxide contributes 0.04 kPa to the total atmospheric pressure.
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Description
Test your understanding of the composition of Earth's atmosphere, including the major gases like nitrogen and oxygen, as well as trace gases. This quiz covers the percentages and contributions of each gas to the total atmospheric pressure, as well as the characteristics of dry air.
