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Science Class Connect Rules. Respect the classroom and our privileges Do not pollute the chat box Stay on topic Science class connects are not free chat sessions Respect the teacher and your peers Be appropriate and use good language Be kind to others
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Science Class Connect Rules • Respect the classroom and our privileges • Do not pollute the chat box • Stay on topic • Science class connects are not free chat sessions • Respect the teacher and your peers • Be appropriate and use good language • Be kind to others • Class connects are a time to learn • Have fun! • Science is cool and full of lots of fun lessons and labs! If you are unable to follow these three rules your privileges will be taken away!
Unit 9 Lesson 11: Asteroids, Comets, and Meteoriods • Agenda: • Explain the interaction of the sun and comets in the solar system. • Describe other objects in the solar system, such as asteroids, comets, and meteoroids
What is an asteroid? • It is an irregularly formed rock piece that has craters from collisions. They could have been formed by collisions or are pieces that didn’t form into planets due to Jupiter being nearby. • Between 1 – 480 miles in diameter
Ceres • Largest found asteroid • Originally classified as a planet • ONLY dwarf planet within inner planets!!!
Gaspra • Found in the inner section of the asteroid belt • Some craters and flat areas Ida • Found in the inner section of the asteroid belt • One of the most cratered surfaces • Has a moon (Dactyl)
What is a comet? A comet is a body that orbits the sun, consisting of a mass of ice, gas, and dust with a tail that streams away from the sun. A comet has 3 parts: Nucleus: made up of ice, rock and dust Coma: a cloud of dust and gas that surrounds the nucleus Tail: created by gas from the solar energy melting the ice in the nucleus
Halley’s Comet • Seen every 75 – 76 years • Recorded as being seen as early as 240 B.C. • Last seen in 1986 • When should it be seen again???? • Shoemaker-Levy’s Comet • Fragments crashed into Jupiter in 1994 • Hale-Bopp Comet • Discovered in 1995 by American observers • How are celestial objects named?? • Previously named after discoverers or mythology • Now numbers, position in the sky, and date of discovery are used • Example: Hale-Bopp Comet = C/1995 O1
Meteor vs. Meteoroid vs. Meteorite A meteoroid is any small body, usually leftover from comets, traveling through space. A meteor is a meteoroid that has entered earth´s atmosphere A meteorite is a meteor that is big enough that it doesn’t burn up Earth’s atmosphere. A crater is formed by a meteorite impacting the earth’s surface.