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The inner planets of the solar system (Mercury, Venus, Earth, and Mars) are composed mostly of _____ while the outer planets (Jupiter, Saturn, Uranus, and Neptune) are composed mostly of _____.

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The inner planets of the solar system (Mercury, Venus, Earth, and Mars) are composed mostly of _____ while the outer planets (Jupiter, Saturn, Uranus, and Neptune) are composed mostly of _____. a. metallic and rock materials; methane and ammonia ice and gas b. rocky materials; metallic materials Answer is metallic and rock materials; methane and ammonia ice and gas