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Earth's Early Atmosphere and Oceans

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Questions and Answers

What was the primary component of Earth's atmosphere 3.8 billion years ago?

Nitrogen

Methane (correct)

Free oxygen

Carbon dioxide

How did the oceans 3.8 billion years ago differ from those of today?

Oceans were more acidic

Oceans were less salty

Oceans were rich in dissolved oxygen (correct)

Oceans were devoid of dissolved oxygen

What is true about Earth's atmosphere 3.8 billion years ago?

It was devoid of oxygen (correct)

It was similar to the atmosphere of Mars

It was primarily composed of oxygen

It was rich in nitrogen

How do the atmosphere and oceans of 3.8 billion years ago compare to those of today?

They were similar in composition Signup and view all the answers

What can be inferred about the oxygen levels in Earth's atmosphere and oceans 3.8 billion years ago?

Oceans were rich in oxygen, and the atmosphere lacked oxygen Signup and view all the answers

How do stromatolites provide insights into the Earth's early environment?

Stromatolites indicate the presence of ancient microorganisms and provide clues about past environmental conditions. Signup and view all the answers

Earth's Early Atmosphere and Oceans

Choose a study mode

Podcast

Questions and Answers

What was the primary component of Earth's atmosphere 3.8 billion years ago?

How did the oceans 3.8 billion years ago differ from those of today?

What is true about Earth's atmosphere 3.8 billion years ago?

How do the atmosphere and oceans of 3.8 billion years ago compare to those of today?

What can be inferred about the oxygen levels in Earth's atmosphere and oceans 3.8 billion years ago?

How do stromatolites provide insights into the Earth's early environment?

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