Multiple Choice
Which of these is true of Mars?
A) Linear canals, apparently built to carry water for irrigation, crisscross the planet.
B) Water can be seen in the bottoms of river valleys on spacecraft photographs.
C) Mars has dry riverbeds but no liquid water on its surface at the present time.
D) There is no evidence of water ever having been on Mars.
Correct Answer:
Verified
Correct Answer:
Verified
Q40: Phobos orbits Mars in a prograde orbit
Q41: Mercury is always much closer to the
Q42: The reddish color of Mars is probably
Q43: When Venus is seen at inferior conjunction,
Q44: Observations of tectonic activity differ on Venus
Q46: There are many reasons why a multiday
Q47: Mercury's atmosphere consists mostly of<br>A) sulfur dioxide
Q48: Venus appears to be very bright as
Q49: Which of these correctly explains why Venus
Q50: What is the major difference between Mariner