What is the most abundant component (at 82%) of Jupiter's atmosphere?
A) hydrogen
B) helium
C) methane
D) ammonia
A
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Which of the following organisms can be called autotrophs?
a) ants, termites, and butterflies b) wolves, coyotes, and foxes c) rabbits, moles, and robins d) daisies, roses, and grass
Compared to the period of satellites in close Earth orbit, the periods of satellites farther away are
A. the same. B. longer. C. shorter. D. none of the above
Which of the following does not physically loosen rocks on the surface?
A) Water contracting as it freezes B) Crystals of salt and other minerals that exert an outward force on fractures C) Roots that pry apart fractures as the root grows in size D) Joints that form when rock pressures are released E) Rodents and other burrowing organisms
A drowned valley is one that has been blocked by seawalls and flooded.
Answer the following statement true (T) or false (F)