Earth's Spheres

Which gas in our atmosphere is most abundant?

• Argon
• Oxygen
• Nitrogen
• Carbon Dioxide

What percentage of our atmosphere is made up of other gases such as argon, water vapor, and carbon dioxide?

• 1%
• 21%
• 78%
• 90%

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

• 1%
• 21%
• 78%
• 90%

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%

Which layer of the atmosphere contains the greatest amount of water vapor?

• Thermosphere
• Troposphere
• Mesosphere
• Stratosphere

What is the lowest main layer of Earth's atmosphere?

• Thermosphere
• Troposphere
• Stratosphere
• Mesosphere

What is the outer most main layer of Earth's atmosphere?

• Thermosphere
• Troposphere
• Stratosphere
• Mesosphere

What is the second lowest main layer of Earth's atmosphere?

• Thermosphere
• Troposphere
• Stratosphere
• Mesosphere

Where is the temperature the highest?

• 1
• 2
• 3
• 4