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S6E1.f. Compare and contrast comets, asteroids, and meteors. What are the characteristics of comets, asteroids, and meteors? How are they alike/different?. Comets. Where do they come from? ORIGIN: Left over from formation of solar system Kuiper Belt & Oort Cloud. Size of Comets.

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s6e1 f compare and contrast comets asteroids and meteors

S6E1.f. Compare and contrast comets, asteroids, and meteors

What are the characteristics of comets, asteroids, and meteors?

How are they alike/different?

comets
Comets
  • Where do they come from?
  • ORIGIN:
  • Left over from formation of solar system
  • Kuiper Belt &
  • Oort Cloud
size of comets
Size of Comets
  • About the size of a mountain (w/out the tail)
  • Tails can be ≥ 100 million km
composition of comets
Composition of Comets
  • Ice
  • Dust
  • Small rocky particles
parts vocabulary for comets
Parts/Vocabulary for Comets:
  • Coma – cloud of dust & gas
  • Nucleus – solid inner core
  • Tail – gas & dust can been seen as the sun heats the comet & blows it away from the sun
other details about comets
Other details about Comets:
  • A.K.A. “Dirty Snowballs”
  • Comet means “Long-haired star”
other details about comets1
Other details about Comets:

Comets orbit in long, narrow, elliptical paths around the Sun.

asteroids
Asteroids
  • Where do asteroids come from?
  • Origin:
  • “Asteroid Belt” between orbits of Mars & Jupiter
size of asteroids
Size of Asteroids
  • From < 1km to

> 300km in diameter

composition of asteroids
Composition of Asteroids
  • What are asteroids made of?
  • Rocky objects left over from the formation of the solar system
other details about asteroids
Other details about asteroids
  • Scientists believe asteroids msy have caused the extinction of the dinosaurs
other details about asteroids1
Other details about asteroids
  • Asteroids move in very elliptical orbits
  • The largest are Ceres, Pallas, Juno & Vesta
meteors
Meteors
  • Where do meteors come from?
  • Broken pieces of Comets or Asteroids!
size of meteors
Size of meteors
  • Smaller than comets or asteroids

(since they come from broken pieces of these!)

The Perseid Meteor Shower (happens every August) which has been observed for 2000 years!

composition of meteors
Composition of Meteors
  • What are meteors made of?
  • Rock & dust
parts vocabulary for meteors
Parts/Vocabulary for Meteors
  • Meteoroid – CHUNK of ROCK/DUST in SPACE
  • Meteor – STREAK of LIGHT made by meteoroid, burn up as they enter Earth’s atmosphere
  • Meteorite – a meteoroid that HITS Earth
other details about meteors
Other details about meteors
  • A.K.A. “Shooting Stars”
  • Meteor Showers happen regularly