how is the composition of a meteorite relevent to finding out the composition of earths core?
83434
the meteorite and the core of the earth are assumed to both have formed around the same time.
606547
More than 4.5 billion years ago, the surface of the Moon was a liquid magma ocean. Scientists think that one component of lunar rocks, called KREEP (potassium, rare earth elements, and phosphorus), represents the last chemical remnant of that magma ocean. KREEP is actually a composite of what scientists term "incompatible elements": those which cannot fit into a crystal structure and thus were left behind, floating to the surface of the magma. For researchers, KREEP is a convenient tracer, useful for reporting the story of the volcanic history of the lunar crust and chronicling the frequency of impacts by comets and other celestial bodies.\n\nThe lunar crust is composed of a variety of primary elements, including uranium, thorium, potassium, oxygen, silicon, magnesium, iron, titanium, calcium, aluminium and hydrogen, as determined by spectroscopy.\n\nA complete global mapping of the Moon for the abundance of these elements has never been performed. However, some spacecraft have done so for portions of the Moon; Galileo did so when it flew by the Moon in 1992.[7] The overall composition of the Moon is believed to be similar to that of the upper parts of the Earth other than a depletion of volatile elements and of iron.
631787
The number is less than the mass of the Earth's mantle divided by the average mass of a sand particle. According to http://www.astro.wisc.edu/~ewilcots/astro236/drakeandrichter.pdf, the mass of the Earth's mantle is around 1.4*10^24 grams. According to http://www.ma.iup.edu/~hedonley/drag/drag25.html the mass of a sand particle is around 1.7*10^(-7) grams.\nThus the amount of particles in a mantle made up completely of sand would be around (1.4/1.7)*10^31 = 8.2*10^30. In America, this would be called 8.2 nonillions by the nomenclature-obsessed minority. Since the mantle is not made completely up of sand particles, the number of sand particles is less than this number, and since that number is less than infinity, so is the number of sand particles. It is thus an unknown, but finite, number.\n\nPS: Note that a "zillion" is not a real number. It is a fictitious play on the way we name large numbers and does not correspond to any exact amount. See http://www.google.com/search?hs=Xwl&hl=en&lr=&safe=off&client=firefox-a&rls=org.mozilla%3Aen-US%3Aofficial&q=define%3Azillion&btnG=Search .
928062
Well you can use spectroscopy to find out the composition of distant objects in space.  IE if a star emits light near (usually a slight red shift from distant objects) the emission lines of helium or mercury you could conclude that those elements are present.\n\nMike
1051685
http://helios.gsfc.nasa.gov/qa_earth.html#coregravity\n\nThe Earth is picking up several tons per day of dust and other stuff, not including the very uncommon meteorite.
1050595
There are three types of asteroid bodies.\n\nStony:  Mostly silicates and the lighter metals that compose most of the crust of the Earth (sand)\n\nNickle Iron: Mostly Heavy Iron and Nickle, but also gold, silver, and radioactive metals, the stuff found in the Earth's core.\n\nCarbonaceous Corondite: This is mostly carbon and ice, cometary you might say... \n\nOur moon is made up of the lighter material because it was formed by a collision with another planet that tore a huge amount of crust material off which formed into the moon.  \n\nThe reason for separation of the materials into layers should be obvious but it is because when formed the liquids settle out by weight, heaviest sinks lowest displacing the rest.
431316
earth is like a boiled egg. The yellow one is the core, the white one is the mantle, the thin layer between the shell and the while is the Moho and the shell itself is like the crust. Magma is molten rocks due to extreme heat and pressure. But the core is divided into two  the liquid outer core and the solid inner core. Core is not a rock. And also rock is the aggregates of minerals.
144124
One common element that is found on this planet is Carbon. So they study the Half-Life of Radioactive isotopes to comeup with the age of a thing. Before the radioactivity method was discovered, scientists used early method. There is a formula that scientists used (Before the discovery of radioactivity method), which was first derived by Kelvin.\nHere is the formula. \n"\nAge = (To - T)2/ ( pi*K*GG2), \n\nwhere To is the formation temperature, T is today's temperature, pi is 3.14, K is a material property called thermal diffusivity (we'll use 1mm2/sec) and GG is the Earth's geothermal gradient (25 C/km). If To ranges from 1500 to 2000 C, the age of the earth would range from 36-65 m.y." - Courtesy: http://www.globalchange.umich.edu/ \n\nOfcourse, after discovering Radiogenic age determining methods, the way of measuring Age of things has changed.\nHere is the link that has more information of Radiogenic dating methods.\nhttp://www.globalchange.umich.edu/globalchange1/current/lectures/clocks_in_rocks/clocks_in_rocks.html\n\nhttp://www.ucmp.berkeley.edu/fosrec/McKinney.html
133252
A meteoroid is a relatively small (sand- to boulder-sized) fragment of debris in the Solar System. When entering a planet's atmosphere, the meteoroid heats up and partially or completely vaporizes. The gas along the path of the meteoroid becomes ionized and glows. The trail of glowing vapor is called a meteor, or shooting star. If any portion of the meteor survives to reach the ground, it is then referred to as a meteorite.79% of meteorites are Chondrites - balls of mafic minerals with small grain size indicative of rapid cooling. In most chondrites small spherules, called chondrules, can be found. Chondrites are typically about 4.6 billion years old and are thought to represent material from the asteroid belt. It is unknown how they formed. Carbonaceous Chondrites, thought to be unaltered solar nebula material, constitute about 5% of meteorites and contain small amounts of organic materials, including amino acids. Also, presolar grains are identified in carbonaceous chondrites. The isotope ratios of carbonaceous chondrites are similar to those of the Sun.Achondrites are similar to terrestrial mafic igneous rocks and sometimes are brecciated. Achondrites constitute about 8% of the incoming material and are thought to represent crustal material of larger asteroids. About 6% of meteorites are iron meteorites with intergrowths of iron-nickel alloys, such as kamacite. Unlike chondrites, the crystals are large and appear to represent slow crystallization. Iron meteorites are thought to be the core material of one or more planets that subsequently broke up. Stony iron meteorites constitute the remaining 2%. They are a mixture of iron-nickel and silicate minerals. They are thought to have originated in the boundary zone above the core regions where iron meteorites originated. A small number of meteorites belong to additional groups or subgroups with unique chemical characteristics relative to other members of the larger groups, such as Lunar meteorites or Martian meteorites.
517835
you mean ferrum it is nothing but the latin name of iron.\n\nIron is the most abundant metal on Earth, and is believed to be the tenth most abundant element in the universe. Iron is also the second most abundant element by mass, making up 34% of the mass of the Earth; the concentration of iron in the various layers of the Earth ranges from high (how much is "high?") at the inner core to about 5% in the outer crust. It is possible the Earth's inner core consists of a single iron crystal, although it is more likely to be a mixture of iron and nickel. The large amount of iron in the Earth is thought to create its magnetic field (you mean to say this isn't known for sure?).\n\nIron is a metal extracted from iron ore, and is almost never found in the free elemental state. In order to obtain elemental iron, the impurities must be removed by chemical reduction. Iron is used in the production of steel, an alloy or solid solution of different metals, and some non-metals, particularly carbon.\n\nNuclei of iron have some of the highest binding energies per nucleon, surpassed only by the nickel isotope 62Ni. The universally most abundant of the highly stable nucleides is, however, 56Fe. This is formed by nuclear fusion in the stars. Although a further tiny energy gain could be extracted by synthesizing 62Ni, conditions in stars are not right for this process to be favoured. When a very large star contracts at the end of its life, internal pressure and temperature rise, allowing the star to produce progressively heavier elements, despite these being less stable than the elements around mass number 60, known as the "iron group". This leads to a supernova.\n\nSome cosmological models with an open universe predict that there will be a phase where as a result of slow fusion and fission reactions, everything will become iron.
550861
iron-nickel - from cores of asteroids \nsilicate rock - from surfaces of asteroids \ncarbon - with complex organic molecules like amino acids
541684
Carbon 14 dating cannot be used to determine the age of the Earth itself.  It has a half-life of only 5730 years, and can only be used on organic materials.  Current techniques can produce accurate results up to about 100 000 years old with Carbon 14, but this is not nearly old enough for the origins of the Earth.\n\nOther methods, such as U-238, or Potassium/Argon (K/Ar) dating can be used on igneous rocks (like volcanic ash, obsidian or granite) to find out when it formed, and have been used to date some of the oldest rocks in the world:  Precambrian granites exposed as part of the Canadian Shield when glaciers scraped all the top layers away during the most recent ice ages (the last of which was a mere 10,000 years ago) have been dated to about 4.2 billion years old, and some Australian zircons have been found to be at least 4.4 billion years old.\n\nHowever even these oldest rocks don't really give us the age of the Earth.  They show us that the Earth must be at least that old, but not exactly when the Earth itself formed.\n\nThe Earth has undergone constant vulcanism and reforming, with oceanic plates sliding under continental plates and being melted and reformed, and even continental plates dividing, subducting, transforming, eroding and being buried under new lava flows.  The oldest ocean beds are Triassic in age, perhaps a mere 300 million years old or less.\n\nHowever meteorites have not undergone this same reworking.  Presumably, most of them would have been formed at the dawn of the solar system, as the sun and planets were accreting from the gas cloud into more solid, spinning forms.  A meteorite from Canyon Diablo has been used as the sort of benchmark test, it is a very large metallic nickel-iron meteorite with sulfide materials, and ideal for most forms of radiometric dating.\n\nThe Canyon Diablo meteorite comes out to 4.567 billion years old.  Other extra-terrestrial rocks, such as the moon rocks, Mars rocks, and other meteorites come out to about the same ages, between 4.53 to 4.58 billion years old.  This range has been determined through a number of different techniques on a wide number of different samples, and they always come out in the same range, thus indicating that it probably accurate.\n\nSo the age of the Earth is generally taken to be about 4.5 to 4.6 billion years.
241652
If you are talking about the core of the Earth or other planet, it is helpful but not complete. Scientists use other things as well (like sound transmission rates) to analyze the Earth's core. But they were probably the primary creators of the core a long time ago.
530206
You see a "meteor" in the sky. You find a "meteorITE" on the ground. There are many different types and sizes of them and they can look very different especially after weathering. Google images of meteorites or get an astronomer at a local college to look at it for you. Yes; it could be very valuable if it is a rare type. Rare ones have sold for thousands of dollars.
703928
By its elements,how much plasma it has or By its mass,volume,and density.i hope this answers your question
588371
That is a matter of semantics.  "atom" means something that cannot be broken, in otherwords is uniform throughout.  Of course that strict definition is not met by the current scientific defintion of an atom, which was inhereted from chemists. \n\nThe chemists studied the properties of elements and identified the smallest chunk of an element that has the same chemical properties as larger chunks of it have. They called that chunk an atom.\n\nFrom the perspective of something REALLY big, I suppose the Earth is just a rock, and if it is not very discerning, I suppose all rocks are more or less alike...but you could split the earth into smaller rocks with similar properties, so I think it would have to be something really big and really unperceptive (like maybe it only observes electron densities, and whether the matter is degenerate or not) for the earth to be considered an atom.\n\nIn the conventional sense of what an atom is, however, the Earth ain't one, because you break it down into smaller things with VERY different properties.\n\nIf you are drawing an analogue between the solar system and the Bohr model of the atom (with electrons circling a central mass) then the Earth would be an electron, but the Bohr model of the atom does not accurately represent what is really going on so the Earth is not a giant electron either.
397779
Most of the earth is made of iron and nickel.  This might not appear to be true at first because we see that the ground does not feel like metal, but the earth's inner and outer cores consist primarily of molten iron and nickel.  The earth's crust is only a few miles thick (at the thickest) and floats on top of the molten layers.