What are the three eons of the Hadean, Archean, and Proterozoic called together?
Geology - The Birth of Earth

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Science, Other
•
10th - 12th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
Precambrian Time
2.
FLASHCARD QUESTION
Front
Why does Earth have fewer craters than the Moon?
Back
Many of the Earth's craters have eroded away.
3.
FLASHCARD QUESTION
Front
True or False: The Earth's magnetic field extends from the north pole to the south pole into space.
Back
True
4.
FLASHCARD QUESTION
Front
Where did the water on Earth come from?
Back
Volcanoes and comets.
5.
FLASHCARD QUESTION
Front
What event formed the original ancient atmosphere?
Back
Outgassing by volcanoes.
6.
FLASHCARD QUESTION
Front
Define the Hadean Eon.
Back
The Hadean Eon is the earliest eon in Earth's history, characterized by the formation of the Earth and its initial cooling.
7.
FLASHCARD QUESTION
Front
What is the significance of the Archean Eon?
Back
The Archean Eon is significant for the emergence of the first simple life forms, primarily prokaryotic organisms.
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