Which of the following does not provide evidence that Mars once had large amounts of flowing water?
A) the presence of what looks like dried-up riverbeds
B) the presence of impact craters that appear to have formed in mud
C) the presence of vast canals discovered in the late 1800s by Giovanni Schiaparelli and mapped by Percival Lowell
D) rocks of many different types jumbled together, as would occur if there had once been a great flood in the region, found by the Mars Pathfinder
E) some very old craters that appear to have been eroded by rain
C
You might also like to view...
Which of the following is not a prediction made by the theory of relativity?
A) No material object sent outward from Earth can reach or exceed the speed of light. B) Observers in different reference frames may disagree about whether two events in two different places occur simultaneously. C) Observers in different reference frames may disagree about the time and distance between two events. D) Observers in different reference frames may disagree about the basic laws of nature. E) E = mc2
Superconductivity is lost when a certain critical temperature is exceeded
Indicate whether the statement is true or false
A ball is attached to a string and revolves in a horizontal circle with angular momentum. When the string breaks at point B on the circumference, the ball moves off tangentially along path B-Q
As it moves along B-Q, increasing its distance from the center of the circle, its angular momentum A) decreases. B) is now zero. C) remains constant. D) increases.
Why do astronomers believe Triton may have been a planet that was captured by Neptune?
A) It orbits Neptune in the opposite direction of Neptune's rotation. B) It is too large to have been formed in the jovian nebula that formed Neptune. C) It has an atmosphere and a measurable greenhouse effect. D) It undergoes seasonal changes. E) It is colder than any other moon or planet.