Composition of Atmosphere

Which gas is represented by Gas #1?

• Oxygen

• Carbon dioxide

• Argon

• NItrogen

Which gas makes up the largest component of the Earth’s atmosphere?

• argon (Ar)

• oxygen (O₂)

• nitrogen (N₂)

• carbon dioxide (CO₂)

Which of Earth’s spheres is composed primarily of gases?

• the Atmosphere

• the Asthenosphere

• the Hydrosphere

• the Biosphere

Which gas in our atmosphere is most abundant?

• Argon
• Oxygen
• Nitrogen
• Carbon Dioxide

What is the percentage of oxygen in Earth's atmosphere?

• 1%
• 21%
• 78%
• 90%

What is the percentage of nitrogen in Earth's atmosphere?

• 1%
• 21%
• 78%
• 90%

What are the 2 most abundant gases in Earth's atmosphere?

• carbon dioxide and oxygen
• carbon dioxide and nitrogen
• nitrogen and oxygen
• nitrogen and hydrogen