Why earth attracts all kind of matter? Is it because of magnetic field? I saw magnets attract only iron.?
540592
Gravity is not caused by magnets. It is caused by matter itself, but it only happens noticably when theres a LOT of matter together (the earth is a LOT of matter).\n\nWe dont really know why matter causes gravity. We cant even measure gravity waves, but we're trying.\n\nString theory is a mathematical system which tries to explain gravity. I dont understand any of it, but thats what people who want to understand gravity are studying.
443941
Even a simplified answer to this is very complicated, so bear with me...\n\nHopefully by now you've learned in school about how everything is made of atoms, and that atoms in turn are made up of smaller particles such as protons, neutrons and electrons.\n\nNow ask yourself:  How come I can stand on the ground?  Why don't I fall straight through the ground to the center of the earth?  What keeps gravity from "mushing" everything together, even electrons and protons?\n\nThere are four Fundamental Forces that we know of in the Universe.  The Fundamental Forces are the "rules" by which all the matter in the Universe interacts with each other.  The four that we know of are:  Gravity, the Electromagnetic Force, the Weak Nuclear Force and the Strong Nuclear Force.\n\nAll the matter in the universe has Gravity as a force, and Gravity is always a "pulling" force; things are always attracted to each other by Gravity.  Gravity is also a very long-reaching force; gravity holds the planets in orbit around the sun, holds the sun and other stars together in a galaxy; and Gravity even acts between other galaxies.  Gravity is a force that reaches all the way across the Universe.\n\nThen there's the Electromagnetic Force.  This is what makes electricity and magnets work.  The Electromagnetic Force (or EM for short) is actually much, much stronger than Gravity, but it works over a much, much shorter distance than Gravity does.  EM is also a "two-sided" force; there's a positive and a negative.  In magnets they're called "north" and "south."  Two charges that are opposite -- positive and negative -- attract each other, while two charges that are the same -- say, negative and negative -- repel, or push each other apart, like when you put the south poles of two magnets together, they want to push apart.\n\nAtoms are made up of protons (which have a positive EM charge) and electrons (which have a negative EM charge).  The protons are all at the center of the atom, while the electrons spin around the outside, making an electron "shell."  Since two things of the same charge repel each other, when two atoms come near each other the negative charges of their electrons push them away from each other.\n\nSo the reason you stand on the ground, why Gravity doesn't pull you down to the center of the earth, is because the electrons in the atoms of your feet are pushing against the electrons in the atoms in the ground.  And since the EM force is much stronger than Gravity, the EM force holds you up and keeps you from "mushing" into the ground.\n\n...Okay, what does this have to do with black holes?  I'm getting to that.\n\nMaybe you've learned in school that our solar system -- the earth, the other planets and the sun -- started out as a huge cloud of gas and dust.  Over billions of years Gravity pulled the atoms in this cloud closer and closer to each other, until they started condensing ("mushing" together) to form the earth, the planets and the sun.\n\nThe sun, you know, is not a solid ball, like the earth is.  It's a huge ball of gas, mostly hydrogen.  So, why doesn't Gravity mush the sun smaller until it becomes a solid ball?\n\nThe reason why is the same reason the sun shines.  The sun is about a million miles across.  That's a really, really huge amount of hydrogen.  Now, Gravity does pull the gas on the surface of the sun down towards the middle; so the atoms on the surface of the sun "fall" down towards the center.  That's half a million miles, which is a long way to fall for anything, even a hydrogen atom.  So when the hydrogen gets to the center, the weight of all the gas above it is so huge, that the atoms get pushed together really hard; hard enough to overcome the negative electrons on the outsides of the atoms.  The hydrogen atoms get "scrunched" together to form a different kind of atom --
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Gold and silver are not ferromagnetic materials and so do not have any magnetic properties. \n\nThe following explanation is from school for science.com  \n\n"Ferromagnetic materials are strongly attracted by a magnetic force. The elements iron (Fe), nickel (Ni), cobalt (Co) and gadolinium (Gd) are such materials. \n\nThe reasons these metals are strongly attracted are because their individual atoms have a slightly higher degree of magnetism due to their configuration of electrons, their atoms readily line up in the same magnetic direction, and the magnetic domains or groups of atoms line up more readily. \n\nIron and steel\nIron is the most common element associated with being attracted to to a magnet. Steel is also a ferromagnetic material. It is an alloy or combination of iron and several other metals, giving it greater hardness than iron, as well as other specialized properties. Because of its hardness, steel retains magnetism longer than iron.\n\nPermanent magnets\nAlloys of iron, nickel, cobalt, gadolinium and certain ceramic materials can become "permanent" magnets, such that they retain their magnetism for a long time."\n\nTry looking at the website for more information. Hope that helps!
1025824
There are a couple of naturally occurring ferromagnetic substances, like magnetite (Fe3O4) or nickel-iron from comets, which can act as permanent magnets. The metals iron, nickel and cobalt all exhibit ferromagnetism and can be magnetized. Oxide minerals from these elements may be ferromagnetic, too.
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I'm anxious to hear if any scientists have an answer to this question.  To me, it sounds like you're asking "Who initiated the Big Bang?" or "Why does gravity cause matter to be attracted to other matter?"  It seems to me like the question of "Why?" neutrons have neutral charges is kind of a God question.
139513
Metals are attracted to magnets due to unbonded electron pairs that can be easily influenced by a magnetic field.\nFerrous metals (refering to Iron) can be easily influenced by a magnetic field, making them very magnetic.
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.
523133
Earth's magnetic field, among other things.
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It all depends in what sense. With magnets you have a north and a south pole, same as the earth. different poles attract, same propel away. In terms of electricity you have negitive and postive thouch both of them together and you get a spark.
859047
The earth's magnetism is a result of the fact that the core of the earth is liquid; as the earth spins around this liquid center, it creates polarity.
911083
The references are a good place to start learning about the earth's magnetic field.  The field on earth's surface is affected by local geologic conditions.  As your altitude increases, the earth's magnetic field looks like the field of a bar magnet.  It will cause rotation in a bar magnet that's free to rotate.  That's how a compass works.  The calculations get complex.  Try looking at a textbook on magnetism.  You'll probably see it worked out as an example.  The force in the form of a torque will be a function of the angle between the bar's magnetic axis and the background magnetic field.
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Magnetic field has to do with the polarize charge of material, such as Iron.  \n\nIt is believed there is significant Iron near the center of the earth and yes rotation will cause the charges to align and thus create a magnetic field.  This is called the "Dynamo Theory".\n\nJUST BEING IRON DOES NOT MAKE THINGS MAGNETIC.\n\n"Previous theorists have assumed that the entire Core (or the Inner and/or Outer Core) rotates as a single flowing object within the Earth. If that were the case, then all of the charged (ionized) Iron material  would follow a relatively circular path around a single axis that we could call the Magnetic Axis. Basic Physics tells us that when electrical charges follow a closed (relatively) circular path (which is effectively a current), a magnetic field is always created as a result. The measurable evidence of this scenario would be a simple "dipole" magnetic field, with a single North Pole and a single South Pole, geographically exactly opposite each other on the surface of the Earth."\n\nSo if this theory where correct the Earth stopping it's rotation would in allow the magnetic field to fad.  But there are major problems with the theory.  For example it is known that the magnetic poles have flipped (Switched places) several time in Earths past.  Will if we have magnetic poles because of the earth's rotation to switch poles we'd need to reverse the cores rotation.  This would be an ungodly amount of energy.  There is nothing known that would do this once let alone a number of times.  And even if something could do it, we should have seen signs of the massive damage that would have resulted with these forces in play, like the Earth falling apart.   But in fact the poles shifting seems to be a pretty peaceful process on a planetary scale. \n\nAnd that is only one problem with the theory.  This is actually a very, very complex subject and there really is no way to know what effect the Earth stopping would have on the magnetic fields.  But I have attached a link to a very good article on the subject and it's pretty easy reading (Keeps the scientific jargon down and uses layman terms.)\n\nOthers are correct tough in what holds us to the Earth is gravity, not magnetics.  So it's the Mass (How big and dense it is) that keeps us here.  And rotation actually wants to make thing's fly away from it.  So we stay because the Earths gravity overcomes the acceleration.  So the acceleration of 1000mph is actually always enacting upon us, making us want to fly off the planet.  So stopping the Earth will not make us fly off as others have posted.\n\nThink of the spinning rids at the fairs and theme parks.  When you spin you are thrown away from the axis, the best example is the cylinder you go in and stand up against the wall.  When it spins your back is pushed against the wall, even as it turns so you are now spinning vertically like a tired, instead of horizontal like a top.  But when they stop the ride you don't go flying out.  That's because the wall holds you in and your move with the ride.  Well gravity acts like the wall and you move with the earth.\n\nYou would go flying of the earth if it continued to rotate and the gravity field somehow disappeared.
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All things with mass (made of matter) have a gravitational pull.  Larger things, like planets, have a stronger pull.\n\nThe magnetic field is caused by the movement of metal under the surface of the earth.\n\nGravity is considered by scientists to be a weaker force than magnetism.\n\nThe magnetic field helps to block harmful rays from the Sun and we would probably fry if we had no magnetic field and no protection.\n\nOf course, if we had no gravity, we would have no atmosphere and would die much more quickly.\n\nDoes that help?
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First of all: God doesn't exist so that explanation is out.\n\nHydrogen was not the only element that existed right after the big bang.  The universe was 75% Hydrogen and 25% Helium with trace amounts of what astrophysicists call 'metals' (which in astrophysics means anything other than Hydrogen or Helium and so rather confusingly includes such things as Oxygen and Nitrogen).\n\nThe rest were created by nuclear fusion reactions inside stars until Iron because a net energy gain is possible when fusing anything lighter than Iron.  Those heavier than Iron were created in supernova when the energy of the Iron core of a really massive star collasping into a Neutron Star allowed for Iron to be fused and some of the heavier stuff (includings things even heavier than Uranium) were expelled and ended up becoming part of our planet.\n\nThat is why there are 90 naturally occuring elements on Earth (not 92, there are two elements lighter than Uranium which don't occur naturally on Earth).
608387
The Earth's center contains a lot of molten iron; due to Earth's rotation, it rotates too, thus generating a magnetic field. It's bit more complicated, but in a nut that's the explanation.
886336
Different metals have different magnetic field strengths.\n\nFor example, neodymium magnets are among the strongest.
699383
First of we have to understand magnetism. All magnetic objects produce invisible lines of force that extend between the poles of the object. An easy way to visualize this is to spread iron filings on a sheet of paper and place a bar magnet under the paper. The iron filings will arrange themselves around the magnet and along the magnetic field lines.\n\nIn the simplest terms, Earth can be thought of as a dipole (2-pole) magnet. Magnetic field lines radiate between Earth's north and south magnetic poles just as they do between the poles of a bar magnet. Charged particles become trapped on these field lines (just as the iron filings are trapped), forming the magnetosphere.\n\nThe origin of the Earth's magnetic field is not completely understood, but it is generally believed to be associated with electrical currents produced by convective effects and rotation in the spinning liquid metallic outer core of iron and nickel. This mechanism is generally known as the dynamo effect. \n\nBecause of the rotating outer core, this then produces an electric current, which in turn, produces a magnetic field that is also known to interact with the fluid motion to create a secondary magnetic field. Together, the two fields are stronger than the original and lie essentially along the axis of the Earth's rotation.\n\nHope this helps you out a little :)