SLCC Fall 2017 Geology 1030 Test 3 31) Which of the following statements concern
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SLCC Fall 2017 Geology 1030 Test 3 31) Which of the following statements concerning ring satellites of the planets is true? A) They are thin, solid disks revolving around the parent planets in polar orbits B) They consist of concentrations of particles generally smaller than 10 meters in diameter C) They have orbits that do not coincide with the equatorial planes of the parent planets D) They are present around Saturn and Jupiter, but not around Uranus and Neptune. Answer: Diff: 1 32) A cluster of three, large, fresh looking, impact craters shown in radar images of the surface of Venus best supports the conclusion that A) tectonism is still very active on Venus B) erosion and weathering are very slow processes on Venus C) volcanism was very active during the first billion or so years of the planet's history D) Venus was recently hit by a large, three-unit, cluster asteroid Answer: Diff: 1 ) Which pair of solar system bodies comes closest to approximating a "double planet o bodies of roughly equal mass are close enough to revolve around each other as the und the Sun? Earth; Venus luto; Charon ranus SaturnExplanation / Answer
1. Ring satellites are common for Jovian planets; the most famous satellites are around Saturn. Apart from Saturn, Jupiter, Uranus, Neptune also have ring system of satellites. (4th option is wrong). These planetary rings are thick (1st option is not entirely right), made up of silicates or ice dust. These rings may contain particles of variable size; from icy dust to boulders (2nd option is also not correct). These rings rotate the planet in a different orbit that of equatorial planets of the parent planet.
The right option is C.
2. Because of the thick and dense atmosphere of Venus, impact craters are not a very common feature in it. They are present mostly in clusters and are all relatively young. No recent meteoric bombardment record could be found in Venus (4th option is not right). Now tectonically it is very active, but the craters do not signify the tectonics on Venus (1st option is wrong). Erosion, weathering processes are not very active in Venus, like Earth, found from the detailed study of meteorites. Craters are not modified by these processes, as they remain in relatively pristine condition (2nd option is wrong). Volcanic activities had been very much dominant in Venus from geologic past, so the 3rd option is right.
The right option is C.
3. Double planet is not an official term, but Pluto – Charon was once proposed to be called as a double planet by International Astronomical Union (IAU), but later the term was rejected by IAU itself.
The right option is B.
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