lunes, 20 de septiembre de 2010

VOCABULARY Nº9

Comet: a ball of rock and ice that orbits the Sun.





Meteoroid: a small asteroid (rocky object that orbits the Sun), which may be far out in the solar system or close to the inner planets.





meteor: a meteoroid that enters Earth's atmosphere and burns with a streak of light.





meteorite: any part of a meteoroid that reaches Earth's surface.


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