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8th Grade Ch. 3 Sec. 5 Comets, Asteroids & Meteors
 

8th Grade Ch. 3 Sec. 5 Comets, Asteroids & Meteors

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    8th Grade Ch. 3 Sec. 5 Comets, Asteroids & Meteors 8th Grade Ch. 3 Sec. 5 Comets, Asteroids & Meteors Presentation Transcript

    • Ch. 3 Sec. 5 Comets, Asteroids, & Meteors YouTube video-Bill Nye Comets & Meteors song
    • comet “ dirty snowball” chunk of ice & dust orbits- long narrow ellipse
    • Parts of a comet coma nucleus tail outer layer inner layer formed by solar wind pushing gas away from the sun
    • tail nucleus coma
    • Most comets- found in Kuiper belt (between Neptune & Pluto) or Oort cloud (beyond Pluto)
    • comet Pigpen from “Peanuts” Interactive Comet Animation
    •  
    • Comet Hale-Bopp in 1997 The passage of Hale-Bopp was notable for inciting a degree of panic about comets not seen for decades. Rumors that the comet was being followed by an alien spacecraft inspired a mass suicide among followers of the Heaven's Gate cult .
    •  
      • Comet Halley was visible in 1910 and again in 1986. The next time it will be visible will be in early 2062.
    • Asteroids
      • Too small & too numerous to be considered full fledged planets
      • Most revolve around Sun between orbits of Mars & Jupiter= asteroid belt
    • the asteroid Ida and its newly-discovered moon, Dactyl
    • Asteroid belt
    • asteroids
    • meteoroid  meteor  meteorite meteor shower
    • meteor
    •  
    • meteorite
    • A shooting star is really a meteor.
    •  
    • Let's Review
    • coma
      • outer layer of a comet
    • “ dirty snowball”
      • Nickname for a comet
    • nucleus
      • Inner layer of a comet
    • tail
      • Formed by solar wind pushing gas away from the Sun
    • elliptical (ellipse)
      • The shape of a comet’s orbit around the Sun
    • meteor
      • A shooting star is really a ________.
    • asteroids
      • Too small & too numerous to be considered full fledged planets
    • meteorite
      • chunk of rock that lands on Earth’s surface
    • meteoroid
      • chunk of rock or dust in space
    • Comets or asteroids
      • Meteoroids usually come from________ or ___________.
    • friction
      • causes meteoroids to burn up in the atmosphere
    • Halley’s Comet
      • The comet that is observed from Earth every 76 years