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| Description: Comets Origin Not well known Form at great distance from the Sun Most famous short-period comet is Halley’s comet 76 year orbital period Potato-shaped nucleus (16 km by 8 km) Meteoroids Called meteors when they enter Earth’s atmosphere A meteor shower occurs when Earth encounters a swarm of meteoroids associated with a comet’s path Meteoroids are referred to as meteorites when they are found on Earth Meteoroids are referred to as meteorites when they are found on Earth Types of meteorites classified by their composition Irons Mostly iron 5–20 percent nickel Stony Silicate minerals with Inclusions of other minerals Meteoroids are referred to as meteorites when they are found on Earth Types of meteorites classified by their composition Stony-irons – mixtures Carbonaceous chondrites Rare Composition – simple amino acids and other organic material Meteoroids are referred to as meteorites when they are found on Earth Types of meteorites classified by their composition Carbonaceous chondrites May give an idea as to the composition of Earth’s core Give an idea as to the age of the solar system Picture Stats: Views: 428 Filesize: 2.43MB Height: 794 Width: 1393 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=39883 |