Earth's second 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
Q4: The solar constant is measured at
A)the outer
Q5: Earth's first atmosphere likely formed from
A)water vapor
Q6: The heterosphere is the layer of the
Q7: Which of the following lists the correct
Q8: Earth's fourth atmosphere likely formed from
A)water vapor
Q10: Why are humans and other living things
Q11: The three stable (i.e. ,nonvariable)gases in the
Q12: Which of the following is false?
A)Air pressure
Q13: Air consists of
A)a mixture of gases that
Q14: Half of the total mass of Earth's
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