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Warm Up – Page 196

Warm Up – Page 196. What is the difference between comets, asteroids, and meteors?. Comets, Asteroids, and Meteors- Oh My!. Asteroid. BrainPop. Asteroids. Definition: objects that are too small and numerous to be considered planets Rocky – 75% of all asteroids

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Warm Up – Page 196

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  1. Warm Up – Page 196 What is the difference between comets, asteroids, and meteors?

  2. Comets, Asteroids, and Meteors- Oh My!

  3. Asteroid • BrainPop

  4. Asteroids • Definition: objects that are too small and numerous to be considered planets • Rocky – 75% of all asteroids • Iron (metals) – 7% of all asteroids • Mixed (rock and iron blended) – 18% of all asteroids

  5. Asteroid Belt The region between the orbits of Mars and Jupiter, where many asteroids are found.

  6. Asteroids…

  7. Asteroids • Not all asteroids are located in the asteroids belt and can pass near Earth • Jupiter’s gravity kept the asteroids from forming a planet • Some asteroids orbit just before and after Jupiter • Largest asteroid, Ceres, is 580 mi across but most are less than a few miles across

  8. Asteroid Impacts • Scientists think an asteroid impact near Mexico caused the dinosaur extinction.

  9. Asteroid Impact crater in Canada http://www.mnh.si.edu/

  10. Comets • BrainPop

  11. Comets • Definition: chunks of ice and dust that usually has a long, narrow elliptical orbit • Comet means long haired star

  12. Comet • 3 parts: • Nucleus • Coma • Tail: always points away from sun Nucleus and coma make up the head .

  13. Comet

  14. Parts Explained • Nucleus – hard rock/ice object • Coma – heated up gas that form a cloud around the nucleus • Tail – dust particles pushed away from the comet by solar radiation; gets bigger as comet gets closer to the sun

  15. Comet Orbits • Comets have long, narrow elliptical orbits • Short period comets are found in the Kuiper Belt • Long period comets are found in the Oort Cloud • Sometimes, comets get too close to the sun, and then…

  16. NASA

  17. Famous Comets Hale- Bopp

  18. More…

  19. More… Comet Hyakutake 1996

  20. More…

  21. More…

  22. In 1994, Comet Shoemaker-Levy 9 collided with Jupiter.

  23. Meteors • Video

  24. Meteors • 3 types: • Meteor: a streak of light in the sky produced by the burning of a meteoroid in Earth’s atmosphere • Meteoroid: a chunk of rock or dust in space • Meteorite: a meteoroid that has hit Earth’s surface

  25. Meteoroids • Meteoroids are small chunks of rock and dust left over from asteroids and comets that pass by the Earth. • They are found within the path of the Earth’s orbit around the sun. • They can be rocky, iron, or mixed.

  26. Meteors Meteor Impact Crater in Arizona. • 3 types: • Meteor: a streak of light in the sky produced by the burning of a meteoroid in Earth’s atmosphere • Meteoroid: a chunk of rock or dust in space • Meteorite: a meteoroid that has hit Earth’s surface

  27. Meteors…

  28. More…

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