Earth's Early Atmosphere

What gas was most prevalent in Earth's early atmosphere?

• carbon dioxide
• oxygen
• water vapor
• sulfur oxides

What gas were we missing in Earth's early atmosphere?

• carbon dioxide
• oxygen
• water vapor
• sulfur oxides

What happened to the water vapor from Earth's early atmosphere?

• evaporated
• condensed
• boiled
• decreased in density

Where did the water for oceans on earth first come from?

• evaporating water vapor
• condensing water vapor
• it has always been there
• it condensed from the sediment

How did carbon dioxide first start getting into the oceans?

• dissolved in rain water
• weathered from sediment
• exhalation from early life forms
• volcanoes

What happened to the pH of the ocean water as more carbon dioxide was added to the oceans?

• more acidic
• more basic
• more neutral
• increased in pH

What happened to the carbon dioxide that was dissolved in the early oceans?

• It evaporated
• It turned into sediment
• It was changed into oxygen
• I can't think of another good wrong answer