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unit 3 lesson 6

QuestionAnswer
dwarf planets a celestial body resembling a small planet but lacking certain technical criteria that are required for it to be classed as such.
kuiper belt a region of the solar system beyond the orbit of Neptune, believed to contain many comets, asteroids, and other small bodies made largely of ice.
kuiper belt object that orbits beyond Neptune and is not controlled by an orbital resonance with Neptune.
comet a celestial object consisting of a nucleus of ice and dust and, when near the sun, a “tail” of gas and dust particles pointing away from the sun.
oort cloud Vast spherical cloud of small, icy bodies orbiting the Sun at distances ranging from about 0.3 light-year to one light-year or more that is probably the source of most long-period comets.
asteroid a small rocky body orbiting the sun. Large numbers of these, ranging in size from nearly 600 miles (1,000 km) across (Ceres) to dust particles, are found (as the <i>asteroid belt</i> ) especially between the orbits
meteoroid a small body moving in the solar system that would become a meteor if it entered the earth's atmosphere.
meteor a small body of matter from outer space that enters the earth's atmosphere, becoming incandescent as a result of friction and appearing as a streak of light.
meteorite a meteor that survives its passage through the earth's atmosphere such that part of it strikes the ground. More than 90 percent of meteorites are of rock, while the remainder consist wholly or partly of iron and nickel.
Created by: yamalis
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