Multiple Choice
Approximately how long after the Solar System formed did it take for oxygen to get to within 80 percent of its present abundance in the Earth's atmosphere?
A) 4 billion years
B) 1 billion years
C) 400 million years
D) 1 million years
E) Oxygen was always a primary component of the Earth's atmosphere.
Correct Answer:
Verified
Correct Answer:
Verified
Q10: According to the figure shown below, about
Q11: Venus has an unusual rotation rate because:<br>A)
Q12: The planet-wide flow of air from a
Q13: You take a sealed plastic bag of
Q14: The nitrogen in the Earth's atmosphere primarily
Q16: Approximately _ years ago, _ began producing
Q17: In the Southern hemisphere, hurricanes _ compared
Q19: Each halogen atom, such as chlorine, fluorine,
Q20: The presence of gases like carbon dioxide
Q22: The primary atmospheres of the terrestrial planets