Which statement about planetary rings is not true?
A) Saturn's rings formed along with its moons 4.6 billion years ago.
B) All four jovian planets have rings.
C) Individual ring particles orbit their planet in accord with Kepler's laws, so that particles closer in orbit faster than particles farther out.
D) Rings are always located closer to a planet's surface than any large moons.
A) Saturn's rings formed along with its moons 4.6 billion years ago.
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Today, we know that Newton's "laws" are
A) often incorrect when applied to molecular-sized objects. B) incapable of explaining the motions of the planets. C) in agreement with all known experimental evidence. D) no longer useful as scientific principles. E) often incorrect when applied to liquids.
Which of the following would be the strongest clue that a rock you have found is a meteorite rather than a terrestrial rock?
A) It contains a lot of iron. B) It is dark colored. C) It contains elements and isotopes in proportions that are rare on Earth but common in asteroids. D) It is too heavy for you to hold in your hand.
The evidence for recent geological activity on Pluto came as a surprise to most scientists, because they did not expect Pluto to retain enough heat to drive such activity. Which of the following best explains why Pluto is so geologically active despite its small size?
A. The activity is driven by tidal heating caused by Pluto’s moons. B. Pluto’s tall mountains built of water ice must be unstable, and when they collapse they can cause geological activity C. The activity is driven by heat from the many impacts that occur in the Kuiper belt. D. The activity involves nitrogen ice, so Pluto does not need much heat to cause this ice to undergo change. E. The activity is driven by the heat of a subsurface ocean.
In the process of vulcanization the LCMs in latex are bonded together with ______________atoms to produce rubber.
Fill in the blank(s) with the appropriate word(s).