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Develop a classification system based on observed structural characteristics. A student is designing a classification key for the planets using information on the chart. Use it to answer the next two questions. 1. What would be the best characteristic to start the key with? A. if the planet was made of rock or gas B. the order the planet was from the sun C. whether the planet had one set of rings or two D. the number of moons 2. A. B. C. D. Which planets would be classified in the same group based on number of moons? Mercury, Venus Mercury, Mars Jupiter, Saturn, Uranus Mars, Jupiter, Saturn, Uranus Planets Majority of Material Order from Sun Has rings Mercury Rock Venus Rock Earth Rock Mars Rock Jupiter Gas Saturn Gas Uranus Gas Neptune Gas 1 2 3 4 5 6 7 8 No No No No Yes Yes Yes Yes Number of moons 0 0 1 2 17 28 21 8 A student is designing a classification key for the planets using information on the chart. Use it to answer the next two questions. 1. What would be the best characteristic to start the key with? A. if the planet was made of rock or gas B. the order the planet was from the sun C. whether the planet had one set of rings or two D. the number of moons 2. Which planets would be classified in the same group based on number of moons? A. Mercury, Venus B. Mercury, Mars C. Jupiter, Saturn, Uranus D. Mars, Jupiter, Saturn, Uranus