Earth's third atmosphere likely formed from
A) water vapor condensed when Earth cooled.
B) photosynthetic activity of ocean bacteria.
C) outgassing from Earth's interior.
D) oxygen molecules absorbing sunlight and forming protective ozone.
E) respiration of early land mammals.
Correct Answer:
Verified
Q15: Nitrogen (N2)is
A)a key component of life,integrated into
Q16: The top of the Earth's atmosphere is
Q17: The outermost region of the atmosphere,based on
Q18: Three criteria used for classification of the
Q19: Which of the following is true of
Q21: Which is true of the amount of
Q22: The high temperatures in the thermosphere occur
Q23: Based on temperature,the atmosphere is divided into
A)four
Q24: Which of the following is not true
Q25: The thermopause is located
A)between the mesosphere and
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