Presentation on theme: "Welcome to Science 12/13/10 Open your books to page 557-561 and use these pages to begin completing the outline you just received. Today’s Schedule 1."— Presentation transcript:
1 Welcome to Science 12/13/10Open your books to page and use these pages to begin completing the outline you just received.Today’s Schedule1. Schedule for the week2. Science Folder/Notes Organized3. Question of the Day4. Discussion on Comets, Asteroids, & Meteors
2 Science Folder/NotesThese items should be in your Science Folder and should be studied for Friday’s Test5 Key Concepts PaperBig Bang Theory/Solar System Flow ChartSun PacketPlanet PacketComets, Asteroids, & Meteoroids PacketLife Beyond Earth PacketWord Wall List
3 Question of the DayWhat is most likely the object that hit Earth in the picture below? A comet, asteroid, meteoroid, meteor, or meteorite?Most likely it was an asteroidWhy study comets, asteroids, & meteoroids.Because they threaten the existence of life on EarthUltra Science: Hitting Earth :
4 CometsWhat is a comet?Small body of ice, dust, and small rocky particles packed together that orbit the sun. “dirty snowballs”Where do they comefrom?Cold outer solar system.Oort Cloud & Kuiper Belt
5 Why are comets important? Comets are made of the “leftovers” from the process of planet formation.Each comet is a sample of the early solar system.
6 A Comet’s TailWhen a comet passes close to the sun, the heat from the sun evaporates the water in the comet creating a tail of gas and dust.
7 Comet OrbitsLike the planets, comets also orbit the sun in an ellipse.A comet’s tail will point away from the sun as it gets closer to the sun.Interactive Comet Animation
8 AsteroidsLarge rocky objects that orbit the sun between Mars & Jupiter (asteroid belt)Like comets, asteroids are the leftovers from the formation of the solar system.
9 MeteoroidsMeteoroid- small chunk of rock or dust. Could be a piece of a comet or asteroidMeteor- meteoroid that enters Earth’s atmosphere & creates a streak (shooting star)Meteorite- meteor that hits Earth’s surface
10 Impact of Asteroids & Meteoroids The main theory on the extinction of the dinosaurs is that it was caused by an asteroid strike.Could an asteroid hit again?YesWill it happen again?When will it happen?2014 & 2021 PossiblyUltra Science: Hitting Earth :Bad Universe: Asteroid Impact SimulationWatch The Asteroid Threat: