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29 Cards in this Set
- Front
- Back
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What is a rocky object in orbit around the sun that is smaller that a planet and also called an asteroid?
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minor planet
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What are the rocky minor planets that orbit the sun, mainly between the orbits of Mars and Jupiter?
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asteroid
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What is a small, ICY satellite of the sun that has a tail when near the sun?
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comet
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What part of the comet contains the nucleus and the coma?
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head
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What part of a comet extends like a long streamer when it is near the sun?
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tail
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What part of the comet contains most of it's material?
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nucleus
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What is the envelope of ice particles surrounding the nucleus of a comet?
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coma
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What are the frozen liquids and gases that are found in the heads of comets?
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ices
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What type of comet tail consists maily of GAS that is pushed back from the head by the SOLAR WIND?
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type I tail
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What type of comet tail consists mainly of DUST pushed back from the head by the PRESSURE OF LIGHT from the sun?
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type II tail
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What type of comet returns or is expected to return to the inner solar system because it has an elliptical orbit?
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periodic comet
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Some astronomers believe that short-period comets come from a donut-shaped region of space beyound the orbit of Uranus. What is this region called?
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Kuiper belt
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What are the rocks and dust orbiting the sun?
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meteoroid
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What is a meteroid that has entered the earth's atmosphere?
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meteor
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What is the bright streak of light and loud noise caused by a large meteor going through the atmosphere?
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fireball
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What is an unusually bright meteor that explodes?
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bolide
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What is the glowing tail behind the fireball called?
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train
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What is a meteor that has survived the trip through the earth's atmosphere to reach the earth's surface?
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meteorite
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What type of meteors come from random directions at any time?
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sporadic meteor
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What type of meteors appear to come from one location in the sky at specific times?
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shower meteors
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What are the meteors of the August 12 meteor shower that appear as though they come from the constellation Perseus?
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Perseids
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What is the point in the sky from which shower meteors seem to radiate or start from?
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radiant
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What are the meteors of the November 17 meteor shower that appear as though they come from the constellation Leo?
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Leonids
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What type of meteors are 85-90% stony materials and are the most common?
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stones (stony meteorites)
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What are meteors that are 85-90% iron?
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irons
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What are the crosshatched lines that appear on the polished surface of a sectioned iron meteorite that have been etched by acid?
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Widmanstatten lines
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What are meteors that are about 50% silicates and 50% irons? These are the rarest type.
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stony-irons
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What are the small silicate spheres often found in meteorites?
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chondrule
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What is the long area on the ground where scattered meteorite fragments from an exploded fireball are found?
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strewn field
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