Which of the following does not move like a projectile?
A. A rock kicked up by a truck wheel
B. An airplane flying at a constant altitude
C. A monkey jumping from a tree
D. The seeds at a watermelon seed spitting contest
Answer: B
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Extrasolar planetary systems are similar to our solar system in all of the following ways, EXCEPT:
A) that planetary orbits are relatively coplanar. B) for the presence of hot Jupiters in some systems. C) that planets orbit in the same direction that their parent star rotates. D) that the systems contain interplanetary debris, such as comets or asteroids. E) None of these are dissimilar to our solar system.
Which of the following is the phase of matter in the Sun?
A) solid B) gas C) plasma D) liquid E) a mixture of all of the above
Cometary impacts with Jupiter
A) are impossible to observe from Earth. B) are spectacular but do not teach us much. C) have been observed from Earth at least twice. D) are extremely rare. E) would not be catastrophic if they happened on Earth.
The "Cambrian explosion" refers to the
A) great many meteorite bombardments that occurred during that time. B) great diversity of life that blossomed during that time. C) evolution and great diversity of blastoids during that time period. D) numerous volcanic eruptions that took place during that time.