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Comets, Asteroids and Meteors

Comets, Asteroids and Meteors. Pages 104-105 What is a comet? Where are most comets found? Draw a picture of a comet and identify the different parts. Describe their MOTION and how they change as they approach the sun?.

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Comets, Asteroids and Meteors

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  1. Comets, Asteroids and Meteors • Pages 104-105 • What is a comet? • Where are most comets found? • Draw a picture of a comet and identify the different parts. • Describe their MOTION and how they change as they approach the sun?

  2. Comet (dirty snowball): collection of ice, dust and small rocks; long, narrow ellipses * Head: Nucleus-solid inner core Coma-fuzzy (clouds of gases/dust) outer layer * Tail: Dust and Gases Up to 100, 000, 000 km long Grows as it approaches the sun in its orbit *Most comets are found:Kuiper belt: area beyond our planets (contains “icy” objects)Oort cloud: area beyond the Kuiper belt

  3. Comets, Asteroids and Meteors • Page 106 • What is an asteroid? • What are they made of? • How did they form? • Where are most of them located?

  4. Asteroid: rocky objects that are too small (and too numerous) to call planets that orbit the sunAsteroid Belt: revolving asteroids locatedbetween Mars and Jupiter(separate theInner and Outer Planets)Ceres(dwarf planet along with Pluto)

  5. Comets, Asteroids and Meteors • Page 107 • What is the difference between a meteoroid, meteor and a meteorite? • What are they made of? • Where do they come from?

  6. Meteoroid: chunk of rock or dust (from an asteroid or comet)Meteor: a meteoroid burning due to Earth’s atmosphereMeteorite: a meteoroid that survives Earth’s atmosphere and collides with Earth (resulting in a crater)

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