Is earth a good conductor or dielectric and how will differentiate between them?
356764
The earth is actually, as a whole, a conductor, mostly because there's a lot of earth to be a source and sink of charge. That's why many high power appliances have a third prong to plug into the wall called a "ground" (the round one below the the two flat prongs). That does actually connect into the earth. That way, if there is a malfunction, the current flows done to the earth, rather than you (which generally is not fun).\n\nIf the earth were a dielectric, current wouldn't flow at all to the earth, and so the current would have to flow somewhere else (possibly you).
868273
Electrical conductivity is a measure of a material's ability to conduct an electric current. When an electrical potential difference is placed across a conductor, its movable charges flow, giving rise to an electric current. The conductivity σ is defined as the ratio of the current density  to the electric field strength :\n\n. \nIt is also possible to have materials in which the conductivity is anisotropic, in which case σ is a 3×3 matrix (or more technically a rank-2 tensor) which is generally symmetric.\n\nConductivity is the reciprocal (inverse) of electrical resistivity and has the SI units of siemens per metre (S·m-1). It is commonly represented by the Greek letter σ, but κ or γ are also occasionally used.
52893
You should try\nhttp://en.wikipedia.org/wiki/Earth thier are alot of links going off of this page so you can find what ever you want
850017
Insulators do not have free electrons to conduct heat or electricity.\n\nMetals, on the other hand, DO have free electrons, and so conduct electricity and heat.  ALL elements can be classified as either conductors, semiconductors, or insulators, depending on how easily electrons will flow.\n\nThe only exception to this rule is diamond, which is an electrical insulator (no free electrons), but an excellent heat conductor.  (The reason is that heat can be transferred by atomic vibration of the diamond crystal lattice, but electricity cannot)
395091
A conductor is a metal such as copper. The outer elctrons of the copper atoms are shielded by the inner shells of electrons so these outer electrons tend to easily move between and around the copper atoms. If a potential is applied to a piece of copper wire then it's these excess electrons that create a current flow in the wire. The is the property of a conductor.\n\nAn insulator on the other hand is formed from atoms that have strong bonds to the outer electrons of each atom. When a electric potential is applied then nothing happens as the atoms won't provide anything for electrons to flow. Silicon and oxygen atoms bonded together make good insulator.
515931
If you stick two electrodes with a light bulb into salty water, the light will shine brightly, showing that it really is a good conductor of electricity. The more ions you add, the more brightly the light will shine.\n\nSo in other words, it sure is a good conductor and it is one because of the NaCl-  (Sodium chloride) in it.
638239
A conductor will allow electricity to pass through it, an insulator will not
620787
the three properties of earth science are gas, liquid, and, solid. wind (or air moving quickly) is a gas.
512437
Ground or earth in a mains (AC power) electrical wiring system is a conductor that exists primarily to help protect against faults and which in normal operation does not carry current.\n\nThe term "ground" is used in Canada and the U.S.; the term "earth" is used in most of the rest of the English-speaking world. They are used synonymously here.\n\nNeutral is a circuit conductor that carries current in normal operation, and which is connected to earth.\n\n    * In a polyphase or three-wire AC system, the neutral conductor is intended to have similar voltages to each of the other circuit conductors, and similar phase spacing. By this definition, a circuit must have at least three wires for one to serve as a neutral.\n    * In the electrical trade, the conductor of a 2-wire circuit that is connected to the supply neutral point is also referred to as the "neutral". This is formally described in the US and Canadian electrical codes as the "identified" circuit conductor. If the entire system is only single phase then the current carrying conductor that is tied to earth is still a neutral by this definition.\n\nThe NEC and Canadian electrical code only define neutral as the first of these. In North American use, the second definition is used in less formal language but not in official specifications. In the UK the IEE definition is a conductor connected to the supply system neutral point, which includes both these uses.
223614
copper and aluminum are best electricity conductors. I would say lead, since it's one of the densiest material out there. Heat is caused by vibrating atoms, denser material means the atoms are closer, and it's melting point is low too. As soon as you touch it with a hot soldering iron, the heat transfers right away and melts it.
248828
Of the metals commonly used for conductors, copper has the highest conductivity. Silver is more conductive, but due to cost it is not practical except as a thin plating to mitigate skin effect losses at high frequencies. Because of its ease of connection by soldering or clamping, copper is still the most common choice for most light-gauge wires.\n\nCompared to copper, aluminium has worse conductivity per unit volume, but better conductivity per unit weight. In many cases, weight is more important than volume making aluminium the 'best' conductor material for certain applications. For example, it is commonly used for large-scale power distribution conductors such as overhead power lines. In many such cases, aluminium is used over a steel core that provides much greater tensile strength than would the aluminium alone [1][2].\n\nGold is occasionally used for very fine wires such as those used to wire bond integrated circuits to their lead frames. The contacts in electrical connectors are also commonly gold plated or gold flashed (over nickel). Contrary to popular belief, this is not done because gold is a better conductor; it isn't. Instead, it is done because gold is very resistant to the surface corrosion that is commonly suffered by copper, silver, or tin/lead alloys. This corrosion would have a very detrimental effect on connection quality over time; gold-plating avoids that.
955371
The earth has an electromagnetic field that is generated by the earth's core.  The core is a ball of hot liquid iron and nickel spinning around, and the spinning of the metal generates the magnetic field. \nIt surrounds the earth, connecting to the earth at the north and south poles.\nIs that what you mean by "themagenet in earth not found in space?"\nIf that's not what you mean, perhaps you need to reword your question into more understandable English.
792215
There are only two types of electric charges that can conduct electricity:  electrons and ions.\n\nVegetable oil has no free electrons.\n\nVegetable oil with some dissolved atmospheric moisture might be slightly conductive because the water can be ionized, but dry vegetable oil has no ions.\n\nTherefore, it is safe to say pure vegetable oil is an insulator and not a conductor (at low voltages, say, below 600 Volts).
483251
metals are good conductor of electricity&they have metallic lustre whiie nonmetals are poor conductors of heat&electricity ,they don't have metallic lustre.metal react with oxygen to form basic ,nonmetal react with oxygen to form  acidic oxide.metals react with acids to liberate hydrogen.nonmetal react with metal to give ionic bond e.gNaCl
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Pure water, H2O is a terrible conductor of electricity, however, water that has hard water deposits and other impurities in it is a great conductor
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Syrofoam is primarily air space, and is thus an extremely poor conductor, but a good insulator.  Im not sure why you thought it was a conductor.
675424
the earth has a molten metallic core that's spinning...creates an em field