As they formed, due to their high temperatures and comparatively weak gravitational fields, which planets were unable to retain appreciable amounts of hydrogen, helium, and ammonia?
A) Neptune and Uranus
B) Mercury and Earth
C) Jupiter and Uranus
D) Jupiter and Neptune
E) Uranus and Pluto
B
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When work is done by a thermal system and heat is subtracted, the system's temperature
A. increases. B. decreases. C. remains unchanged. D. none of the above
The higher abundance of O16 in glacial ice occurs because it is the lighter oxygen isotope; it evaporates more easily
than O18 and then is precipitated as snow. a. True b. False
Olympus Mars, the largest volcano in the solar system, is
a. on Venus. b. a shield volcano. c. covered with an ice cap. d. indicative of active plate tectonics.
If a point on the coast experiences a semi-diurnal tide, what does the daily tide record show?
a) One high tide and one low tide per day b) One high tide (half a tide) one day and one low tide the next c) Either one or two high tides each day, as long as they don't change much d) Two nearly equal high tides and two nearly equal low tides each day e) Two unequal high tides and two unequal low tides each day