Multiple Choice
When Venus first formed it had large quantities of water vapor in its atmosphere while today only very low levels of water are present. Where did most of the water vapor go?
A) it was destroyed in the atmosphere by ultraviolet light from the Sun
B) it became chemically incorporated into rocks in the crust
C) it was blasted into space by impacts
D) it escaped into space
Correct Answer:
Verified
Correct Answer:
Verified
Q1: If distance from the Sun were the
Q2: If Mars had a thicker atmosphere with
Q3: Climate models which ignore human activity<br>A) completely
Q4: Evidence that the recent rise in carbon
Q6: Which of the following provides evidence for
Q7: When the Sun was younger, how did
Q8: Venus is located<br>A) near the outer boundary
Q9: What is the definition of a star's
Q10: Around 4 billion years ago Venus could
Q11: Stars much more luminous than the Sun