Earth Systems Evolution of the Atmosphere

The most abundant gas in Earth's atmosphere today is what?

• Oxygen

• Nitrogen

• Troposphere

• Helium

What gas makes up 21% of Earth's Atmosphere today?

• Nitrogen

• Oxygen

• Ozone

• None of the Above

What two elements made up the early atmosphere?

• Nitrogen and Oxygen
• Carbon Dioxide and Oxygen
• Hydrogen and Helium
• Water Vapor and Oxygen

The first plant was ______________.

• kelp
• seaweed
• blue-green algae
• pine tree

This gas was in high concentrations in the early atmosphere, and later condensed to form the Earth's oceans.

• oxygen

• carbon dioxide

• sulfur oxides

• water vapor

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

• 1%

• 21%

• 78%

• 90%

According to scientists, both Earth and moon are...

• About 1.6 Billion Years Old
• About 4.6 Billion Years Old
• About 9.6 Billion Years Old
• About 14 Billion Years Old

Tags

NGSS.MS-ESS1-4

What process caused oxygen to build up in the atmosphere

• Respiration

• photosynthesis

• combustion

• cows belching

Tags

NGSS.MS-LS1-6