What are the two types of meteorites?  Which one is more common?
359180
Chondrites and achondrites is one answer.  Chondrites are the more common form.  But another answer would be "stony" and "iron", of which the stony form is more common.  But of course you can have stony-iron meteorites too...
881773
A shooting star is a meteorite burning up in our atmosphere.A meteorite is a small piece of space dust usually pea size,maybe a little larger or smaller.Comet are a collection of space debris loosely held together by its own gravity;thus the dust trail.Asteroids are space bodys usually of some size(a few hundred feet to several miles wide).Comets can be quit large as well and the tail is caused by the sun melting the comet.
521545
Meteoroid:\n1 : a meteor particle itself without relation to the phenomena it produces when entering the earth's atmosphere\n2 : a meteor in orbit around the sun \n\nMeteor: \n1 : an atmospheric phenomenon (as lightning or a snowfall)\n2 a : any of the small particles of matter in the solar system that are directly observable only by their incandescence from frictional heating on entry into the atmosphere b : the streak of light produced by the passage of a meteor\n\nMeteorite:\na meteor that reaches the surface of the earth without being completely vaporized\n\nSo, the thing is a meteoroid in space, a meteor in the atmosphere, and a meteorite if it hits the ground.
45660
Three types of rocks: igneous (formed by volcanic activity, like obsidian and pummice), metamorphic (formed by heat and pressure, like marble and quartzite) and sedementary (formed by accumulated depositing of loose material, packed hard into a rock, like sandstone and limestone).
48941
Miller-Urey did not have a meteorite.  They applied a number of conditions that may or may not have been present on the early earth to an array of simple organic substances.  At the end of the experiement they had discovered that simple amino acids had formed.\n\nWe have found amino acids from space, we dectect them in gas clouds in the galaxy, and have found them in a metorite sample that fell in Austrailia in 1969\n\nAmino acids, are amino acids by chemical designation, an amino acid formed on mars would be the same as that particular amino acid formed on earth or anywhere else.
769058
A little more specifically, meteorites contain little inclusions called "chondrules" which have not been melted and reformed since they first formed in the proto-planetary disk around our sun.  All rocks we find on Earth or any other world have been formed since that time; the "fingerprint" of what conditions were like in space before becoming part of a planet is lost. This is not the case for chondrules in meteorites.\n\nChondrules give us insight into the sorts of particles that were available for larger bodies (and eventually planets) to form from.\n\nYou can read about chondrules on wikipedia.\nhttp://en.wikipedia.org/wiki/Chondrule\n\nAsteroids are examples of the smallest gravitationally bound objects in the solar system.  These are possible building blocks of protoplanets (enough of them stick together and you can have enough gravity to start pulling dust and even gas right out of the proto-solar disk).  By understanding their characteristics, we can more accurately model the formation of protoplanets.
395085
yeh, a meteorit and a galaxy are coming to earth. Don't worry, they come only after 2 milion years...;))
944055
Two answerers have reported cases of  hit by meteorite but it is not known whether the ususual phenomenon had been  reported by them to astronomers for  verification. If not it is only their word against the physical impossibility of meteor  ever striking anybody on earth it is difficult to believe that what hit them  was meteorite or anyt hing else.\n\nThe risk of getting hit by a meteorite is practically zero. The largest of the Leonid meteors -- a very small number -- might be the size of baseballs. But after striking the atmosphere at 44 miles per second, few if any will survive long enough to hit the ground.\n\nWhat of peope on earth  the satellites in orbit to whom meteor  pose a slight risk have never so far been hit by it.. Even the ones the size of a grain of sand, because they are moving 200 time faster than a speeding bullet, could damage a satellite beyond repair if it were to hit it just right. Another danger from the impact of a meteor on a satellite is an effect called "charging" in which the collision creates a tiny cloud of electrically charged gas, called plasma, that can short out electrical systems.\n\nMany satellite operators take precautions during meteor showers, such as angling sensitive optics away from the oncoming meteors, or turning solar arrays on edge to the shower.\n\nHowever,scientist  note that the risk of a satellite getting "taken out" by a meteorite or even a shower of it like Leonid is quite small, less than 0.1 percent. The  satellites are more at risk every day from man-made space junk.\n\nDespite this technical position there have been some cases of these bolts from the blues striking the 'sinners' (?) on earth.Thus\n\nIn all of recorded human history, no one has ever been killed by a meteor. But there have been a number of people struck by them, as well as some who were nearly struck, along with many cases of damage to animals and property. \n\nSome examples:\n\nOn November 30, 1954, Alabama housewife Ann Hodges was taking a nap on her couch when she was awakened by a 3-pound (1.4-kilogram) meteor that crashed through the roof of her house, bounced off a piece of furniture and struck her in the hip, causing a large bruise. \nOn October 9, 1992, a large fireball was seen streaking over the eastern United States, finally exploding into many pieces. In Peekskill, New York, one of the pieces struck a Chevrolet automobile owned by Michelle Knapp. Knapp was not in the car at the time, but heard the crash and ran out to her driveway to find a hole punched clear through the trunk of her car and a warm 26-pound (12-kilogram) meteorite lying under the vehicle. But things turned out well in the end -- her old and rather run-down automobile instantly became a collectors item and later sold for tens of thousands of dollars. \nOn June 21, 1994, Jose Martin of Spain was driving with his wife near Madrid when a 3-pound (1.4-kilogram) meteor crashed through his windshield, bent the steering wheel and ended up in the back seat. Martin suffered a broken finger while his wife was uninjured.
205880
igneous... hmm fudge? sedimentary, sugar cookies? metamorphic chocolate chip. neat question but I think candy is more like igneous, fudge more like sedimentary, and metamorhic... crush up several types and rebake them as granite!
1072965
Asteroides \n\nAny of numerous small celestial bodies that revolve around the sun, with orbits lying chiefly between Mars and Jupiter and characteristic diameters between a few and several hundred kilometers. Also called minor planet, planetoid.\n\nA small, mostly rocky body orbiting the Sun. Asteroids range in size from 1000 kilometers in diameter to tiny objects you could hold in your hand. Most asteroids orbit the Sun between Mars and Jupiter, and are the source of most meteorites. \n\nAn asteroid is a small, solid object in our Solar System, orbiting the Sun. An asteroid is an example of a minor planet (or planetoid). These minor planets are much smaller than the small planets such as Mercury or Mars. It is believed that most asteroids are remnants of the protoplanetary disc. The incorporation of these remnants into the planets during the formation of the Solar System was prevented by large gravitational perturbations induced by Jupiter. Some asteroids have moons. The vast majority of the asteroids are within the main asteroid belt, with elliptical orbits between those of Mars and Jupiter.\n\nMeteorites\n\nA stony or metallic mass of matter that has fallen to the earth's surface from outer space.\n\nthat survives the intense heat of atmospheric friction and reaches the earth's surface. Because of the destructive effects of this friction, only the very largest meteors become meteorites.\n\nObjects from outside the Earth that enter the Earth's field of gravitation and fall to the Earth's surface. Meteors, on the other hand, are objects from space that burn up in the Earth's atmosphere. \n\n\nMeteorites are bodies that are left over from the time when the planets formed, and therefore give us clues about the formation of the solar system.\n\nA metallic or stony (silicate) body that has fallen on Earth (or other planetary body) from outer space. Most meteorites come from asteroids, but a small number come from the Moon or Mars (see SNC meteorites). Meteorite types include: iron, stony iron, chondrite, carbonaceous chondrite, and achondrite. [See "Meteors, Meteorites, and Impacts" from The Nine Planets website.] Meteorites smaller than 1 mm are called "micrometeorites." \n\nA mass of metal or stone remaining from a piece of matter that has fallen upon the earth from the solar system.
149229
A. Pyrite and magnetite are both from the same crystal system. That means they form crystals in a similar shape or pattern. They are both from the isometric system. They will both be blocky crystals but may not be exactly the same. Perfect pyrite crystals are cube shaped or diploidal (see:http://webmineral.com/data/Pyrite.shtml), and magnetite is an octahedron (see: http://webmineral.com/data/Magnetite.shtml).\n\nHardness of magnetite is 5 1/2-6 on Mohs scale and pyrite is 6- 6 1/2.  \n\nBoth have conchoidal fracture. (Quartz has conchoidal fracture in case you need to picture this)\n\nBoth have a similar density. Pyrite has a density of 4.8-5 g/cc and magnetite has a density of 4.95 gm/cc.\n\nBoth have a metallic luster. \n\nB. The best way to distinguish between them is to use a streak test. Magnetite will be grayish-black and pyrite will be greenish-black.\n\nThe other major difference is that magnetite will be naturally magnetic, and pyrite will not be. \n\n\nThe lesson here is to learn think of your different properties as sort of a tool kit. Decide which properties are useful and which ones will not be useful for the particular samples you are testing. Be sure to be familiar with all of the properties you can use. A list would be:\na. cleavage\nb. color (one of the least reliable)\nc. density\nd. luster\ne. fracture\nf. crystal habit (can be confusing because some minerals have several possible)\ng. hardness (know the hardness of common tests like a penny, a knife, a quartz crystal, glass, etc.)\nh. streak\ni. magnetism\nj. taste (best test for Halite or sylvite)\nk. There are lots more that involve using thin sections in a microscope, and X-ray diffractometer, etc.
935624
The evolution of a comet. We did that last year to show how a comet becomes an asteroid. We used dry ice, dirt, dark corn syrup. It was fun. And we had live demonstration and lots of pictures. This link has a comet recipe: http://www.noao.edu/education/crecipe.html\n\nHere's another site that you can look for ideas: http://www.spartechsoftware.com/reeko/MoreExperimentsSortCategory.htm
982387
Meteorites decrease in size as they are burned up by our atmosphere, therefore a large meteorite would become very small by the time it reaches the ground.
935247
Our solar system- the Sun, planets, Kuiper belt and Oort cloud, everything orbiting the sun even many times further than the orbit of Pluto- is thought to have condensed from a vast cloud of interstellar gas some billions of years ago when that cloud was shocked or squeezed by a supernova explosion. The dust and grains that condensed out of the cooling solar gas aggregated to form larger fragments of rock. Chondritic meteorites are basically just such collections of grains and fragments that have been compacted together to form a larger piece of rock and eventually small planetary bodies. Such bodies are termed planetesimals when they become roughly as large as asteroids (several kilometres to a few hundred kilometres in dimension). The larger they grow, the greater the gravitational attraction that the planetesimals exert and hence the more effectively they sweep up additional particles and rock fragments while circling the Sun. (Britannica CD) \n\nBecause that initial shockwave came from a particular direction and because the cloud was not of uniform density, the particles had a net rotation around their center of gravity. Humans subsequently identified that direction as "counterclockwise as viewed from above the north pole of the sun". As the bodies of the solar system grew by accretion, particles swept up from different distances from the center of gravity (the sun) had different orbital velocities. Analogously, water swirling down a drain moves slower further and faster closer to the center. \n\nGalileo and Newton showed that rotational energy is conserved: The sun and planets ‘inherited' their spin from the orbits of their constituent particles, so to speak. Today, some five billion years later, all that rotational energy is still conserved in the rotations and revolutions of the bodies of the solar system. Our solar system is not unchanging, though. Because of gravitational interactions between moons and their planets, between the planets, meteors and comets themselves and interactions between the solar wind and the magnetospheres of the planets, rotational energy is still be ‘traded' back and forth: Mercury orbits in a 3:2 resonance with its rotation, our day is getting longer while the moon only shows one face towards us, the rings of the gas giants are temporary phenomena,... But that's another story.
1114281
1. Smog\n2. Meteors if they burn up or meteorites if they survive entry through the atmosphere & strike the ground.
427675
The answer is: it is pretty hard to find them.\n\nThe easiest ones to find are iron meteorites, litterally hunks of iron from space.  The tend to have a black crust, but will look like mangled chunks of iron.\n\nFor your more stone-like meteorites it gets harder.  A metal detector still helps, as even most "rock-like" meteorites still have lots of iron and nickle in them.  Generally they will appear as dark black rocks, due to the surface of the rock having been melted during entry into the atmosphere.  Finding them in the mountains will be _very_ tough, as they really, really just look like most of the rocks sitting around.\n\nThe desert is a bit easier, especially if it is a more or less sandy desert.  If you are someplace without any rocks (like a sand dune desert) and you come across a dark, black rock, you may have found one.  The easiest way to find them it to go to places like this, where a dark black rock will stand out against the background.  Most proffesional meteorite collection efforts take place in places like the sahara desert, and antarctica.\n\nTo really identify them outside of these "easy" circumstances you will really need to train yourself up.  There are field guides out there that can help train you to look for the slight tell-tale signs that the rock you are holding is not from our planet.
876456
Meteorites can fall anywhere so they're just as likely to fall in Kansas as anywhere else.  That means they probably mostly fall in the ocean.  The only place people really go hunting for meteorites is in Antarcitca where they can fall and stay there for thousands or more years pretty much undisturbed.