The origin of Earth's early atmosphere was because of
A) the impact of a Mars-sized planet.
B) atmospheres of impacting asteroids and comets.
C) degassing of Earth's interior over time.
D) chemical reactions in the early crust.
Correct Answer:
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Q8: The first surface of Earth was likely
Q9: Before the formation of our solar system,
Q10: The origin of Earth's Moon was
A) waves
Q11: The reason that Archean protocontinents were small
Q12: From those listed below, select the incorrect
Q14: Archean greenstone belts sit among masses of
A)
Q15: The oldest known crustal materials, which are
Q16: Meteorites made of iron with olivine crystals
Q17: The maria on the Moon were formed
Q18: Isotopic evidence shows that photosynthetic life existed
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