The heavy bombardment was a time in which Earth was struck by many
A) meteorites.
B) protoplanets.
C) comets.
D) asteroids.
Correct Answer:
Verified
Q1: Earth is approximately how old?
A)14 billion years
B)4.54
Q8: Chalk rock contains many tiny plankton shells.This
Q9: Where would you be most likely to
Q11: Why did banded iron formations form between
Q15: Oxygen in Earth's atmosphere is derived from
Q16: The Great Oxygenation Event occurred ~2.4 Ga
Q17: Which of the following is NOT true
Q18: Which eon saw the first single-celled organism?
A)Proterozoic
B)Archean
C)Hadean
D)Cenozoic
Q18: Stromatolites are layered structures produced by the
Q19: It took so long for true crust
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