1P4.5 asteroid, meteor, comet.notebook

Asteroids • asteroids are large pieces of rock/metal that orbit the sun • they vary in size (diameters range from 10 m to 100's of km) • most asteroids exist in the Asteroid Belt (located between Mars and  Jupiter) • asteroids can be a deadly threat explain: • they could also be a valuable resource explain:

1P4.5 asteroid, meteor, comet.notebook

Meteors • meteors are small pieces of rock/metal that move quickly through space • the sizes vary (from a grain of sand up to 10 m) • meteors hit Earth fairly often • most of them burn up as they pass through Earth's atmosphere (seen as a "shooting" or "falling" star) • larger meteors don't burn up completely and hit the Earth's surface (called meteorites)

http://www.videojug.com/film/what­is­a­meteor

1P4.5 asteroid, meteor, comet.notebook

Comets • a comet is a large piece of frozen gas and dust (a "dirty iceball") • comets travel in huge, elongated orbits around the sun • the head (coma) of a comet is small (usually less than 10 km) • however, the tail of a comet can be 100's of millions of km long! • the tail is only produced when the comet gets close to the sun explain:

Halley's Comet (1986)

Comet Hale­Bopp (1997)

Somother Comet (pretty)

1P4.5 asteroid, meteor, comet.notebook

1P4.5 asteroid, meteor, comet.notebook

sun

earth's orbit

Astro­Journal Write one question about asteroids, one question about meteors and one  question about comets in your Astro­Journal (make up questions that can be  answered based on today's lesson). Trade journals with someone and answer the questions in their journal.

1P4.05 asteroid, meteor, comet.pdf

Page 1 of 5. 1P4.5 asteroid, meteor, comet.notebook. Asteroids. • asteroids are large pieces of rock/metal that orbit the sun. • they vary in size (diameters range from 10 m to 100's of km). • most asteroids exist in the Asteroid Belt (located between Mars and. Jupiter). • asteroids can be a deadly threat. explain: • they could also ...

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