The reason that the atmosphere of Venus is over 95 carbon dioxide is thought to be because:
A) Venus was much hotter than Earth when its atmosphere formed.
B) the early plant life on Venus produced the excess carbon dioxide and consumed the oxygen.
C) life on Earth formed earlier than on Venus.
D) the part of the solar nebula where Venus formed contained more carbon dioxide than the part where Earth formed.
E) Venus' Greenhouse Effect got out of control and became runaway after its oceans of sulfuric acid evaporated.
Question 2The angular separation of two stars is 0.1 arcseconds and you photograph them with a telescope that has an angular resolution of 1 arcsecond. What will you see?
A) The two stars will appear to be touching, looking rather like a small dumbbell.
B) The stars will not show up at all in your photograph.
C) The photo will seem to show only one star rather than two.
D) You will see two distinct stars in your photograph.
Question 3Suppose you have two small photographs of the Moon. Although both look the same at small size, when you blow them up to poster size one of them still looks sharp while the other one becomes fuzzy (grainy) looking.
Which of the following statements is true? A) The one that still looks sharp at large size has better (smaller) angular resolution than the one that looks fuzzy.
B) The one that looks fuzzy at large size has better angular resolution (smaller) than the one that looks sharp.
C) Both photographs have the same angular resolution, because they were both printed at the same sizes in each case.
D) Both photographs have the same angular resolution, because they are both photographs of the same object.
Question 4It is very cold, but otherwise quite comfortable. You breathe deeply.
Although there is no oxygen (not to worryyour life-support belt will take care of that problem), the air pressure is quite tolerable and seems almost Earth-like (because it is mostly nitrogen). Your vista might even include such breathtaking sights as an ocean of liquid methane before you, and snow-capped (methane snow) mountains behind (although the atmosphere is very smoggy and the visibility consequently is limited). Your solar day is about 16 Earth days long. A large, ringed object seems to hang in your sky, never rising or setting; however, it goes through phases from new to full and back to new again with the same 16-day period as the rising and setting of the Sun.
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