What are Saturn's rings?
A) a great disk of liquid helium
B) large rocky boulders moving in orbit around Saturn
C) a glowing, flat magnetospheric auroral display
D) a solid thin disk of material encircling Saturn
E) small icy particles moving in orbit around Saturn
E
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The terrestrial planet with the oldest surface is ____________________
Fill in the blank(s) with correct word
Which of the following best describes the findings of the Viking landers in the experiments they conducted to search for life on Mars?
A) Some experiments were potentially suggestive of life, but their results could also be explained by chemical reactions not associated with life. B) Absolutely no evidence indicating life was found in the Martian soil. C) The landers detected organic material and evidence for microbial organisms in the soil. D) The experiments failed to operate properly and therefore did not provide any results.
If one object has a large redshift and another object has a small redshift, what can we conclude about these two objects?
A) The one with the large redshift is moving toward us faster than the one with the small redshift. B) The one with the large redshift is moving away from us, and the one with the small redshift is moving toward us. C) The one with the large redshift is moving away from us faster than the one with the small redshift. D) The one with the large redshift is hotter and therefore is putting out more radiation. E) The one with the large redshift is redder than the other one.
The overall direction of change in the universe is toward
A. a state of increased mass in the universe. B. a state of greater disorder. C. a state of increased organization. D. increased energy content of the universe.