Download Review: sun spots and solar flares inner and outer planets what

lesson5.notebook
October 09, 2013
Review:
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sun spots and solar flares
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inner and outer planets
­ what makes a planet
­ Pluto the dwarf planet
May 26­10:20 AM
May 26­10:40 AM
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lesson5.notebook
October 09, 2013
Comets
­ dirty snowballs composed of ice, rock and gas
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originate from the Kuiper Belt (small bodies orbiting the sun beyond Neptune)and Oort Cloud (cloud of icy debris at the furthest reaches of suns gravity in our solar system)
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They travel in long elliptical orbits around the sun and are affected by the gravitational pulls of other planets
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It has a long dust tail as sunlight starts to melt the ice, these can stretch millions of km
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Most famous is Halley's Comet which is visible every 76 years or so
May 26­10:24 AM
Periodicity of Comets:
­ "Period" is the amount of time it takes an object in orbit to return to its starting location. ­
Comets travel in short and long periods around the sun in elliptical orbits
May 26­10:27 AM
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lesson5.notebook
October 09, 2013
The Elliptical orbit of Halley’s Comet
May 26­10:28 AM
Asteroids
­ Small bodies believed to be the leftover remains of the formation of the Solar System
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Mostly found in an asteroid belt between Mars and Jupiter
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They have irregular shapes
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Range in size from a grain of sand up to 1000km
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An asteroid up to 1 km would devastate Earth
May 26­10:30 AM
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lesson5.notebook
October 09, 2013
May 26­10:31 AM
Meteors
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Meteoroid ­a rocky chunk, broken off an asteroid or planet, which floats through space
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Meteor­a meteoroid that burns up as it passes through Earths atmosphere, seen as a shooting star
­ Meteorite­a meteoroid that does not burn up fully in the Earths atmosphere and hitsthe Earths surface
May 26­10:31 AM
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lesson5.notebook
October 09, 2013
Deep Impact Sites
­ A place where a relatively small object (meteorite) has collided with a larger object (planet) ­ Produces a fairly circular depression in the surface of the larger object referred to as an impact crater
May 26­10:33 AM
Readings:
Pages 398 ­ 407
Questions:
Page 411: #'s 4,5,6,7,8
Asteroid Video:
May 26­10:35 AM
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