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The effect is entirely natural and happens because Earth has a molten outer core made of Iron which is convecting. When such a body is then rotated (spun on its axis) natural magnetic fields and electric currents are generated in it. These are the source of Earth's magnetic field.
What else can I help you with?
Did Amelia Earhart act like a tomboy when she was a child?
Yes she act like a tomboy when she was a child because she like to do what boys doing.
What lines act as a invisible grid over the earth?
They are the lines of latitude and longitude.
What legislative actions occurred directly following the first earth day?
clean water act of 1972
Why does the earth act like a magnet?
The magnetic field of the Earth is a result of a huge electric current that flows in the molten portion of the Earth's outer core.There are two basic ways to create any magnetic field. One can have a permanent magnet like a bar magnet which has a magnetic field or one can have an electromagnet, like a solenoid, and the flow of electric current produces the field.Inside the Earth, there is a very large current.The complete explanation requires a description of what causes the current. This has been a matter of scientific conjecture for five centuries. The most favored explanation is called the the dynamo theory and describes the origin of the current circulating in the Earth's core.The Earth's core has two parts, an inner core that is solid and an outer core that is liquid. The core is made primarily of iron and nickel and is very hot and under great pressure.The inner core has a radius of about 1,000 km (700 miles) and the liquid part extends another 2,000 km (1,400 miles) until the Earth's mantle is reached at a depth of 5,000 km (3,000 miles) beneath the Earth's surface. The core is very hot, about 5700 K (5400 °C), and the pressure at the center is enough to make the inner core solid.The nickel iron mixture of the core is a very good conductor of electricity and the current causing the Earth's magnetic field resides there. There is, of course, electrical resistance and if there were not something causing the current, it would disappear in a few thousand years.The dynamo theory explains the current is caused by the motion of the liquid part of the core. As the liquid move through the existing field, like any conductor moving through a magnetic field, a current is induced in the moving conductor. That adds to the current already present and keeps the current from decaying due to natural electrical resistance of the medium.The liquid in the core is in motion for two reasons. First, there is convection in the core. The inner core is much hotter than the surface, so hot fluid at the inner core tends to rise towards the cooler mantle above it. In addition, there is a coriolis force due to the rotation of the Earth. (This is the same force present in the atmosphere of the Earth that is responsible for the general trends of winds around the globe.) The liquid motion in the core forms as roughly stable pattern, replenishing the current and maintaining the field which. As a result, this is a self sustaining process, with the field causing the current and the current causing the field.Other Issues:The dynamo theory requires a lot of detailed information and complex calculation to go from the qualitative picture presented above to a quantitative description of the properties of Earth's magnetic field. The research on the theory and the calculations of predictions is quite an active enterprise.There are furthermore other aspects of the field that require explanation, such as the fact that the north and south poles switch positions (pole reversal) sometimes and this may happen every few million or even few thousand years.The general shape of the Earth's magnetic field is very much like a bar magnet field. The shape is said to be a dipole field more or less. But the general shape has a great many details and anomalies where the strength and direction of the field are not so simple. This is only partly caused by variations in the thickness of the mantle layer.Finally, it is know that Earth is not the only planet with a magnetic field. Several other have, or in the past had, a magnetic field. Even some moons in the solar system show evidence of present or past magnetic fields. It appears that the mechanisms that create a planetary magnetic field are quite natural and it happens all the time.Many aspects of geomagnetism are still under investigation.
How does rubber moorings in a building help minimize damage during an earthquake?
Because rubber is flexible - so it absorbs a lot of the motion of the earth during a quake. Rubber moorings act as a kind of barrier between the building and the earth.
Why doesn't a normal piece of magnet act like a magnet?
coz i dont know
Why is the earth is a big magnet?
Earth has a molten liquid core containing iron. It is believed that as it moves or spins, it creates an electric current that causes a magnetic field around the Earth. The field is believed to be created by this dynamo action. The magnetic field makes the Earth act like a huge magnet so it attracts like one. That's why it pulls the magnetized needle in a compass and makes it point in the general direction of the North Pole.>alryan< add me on facebook: alryanupi@yahoo.com
How do water act like little magnet?
because its connected to the oxygen
Why does water have a lopsided and act like a chemical magnet?
lol not giving the answer to anyone
What is the scientific definition of magnetism?
magnetism is a strange force from the center of the earth attracting every single magnet on the earth, it also acts as a compass to a magnet. if you take a magnet tie it to a string it will go north direction and it also act as a very concentrated metal meaning it can attract on its own.
Does the earth act like a big bar magnet?
The earth acts as a sort of magnet. The gravity is like a + and we are - but neither of us have any charge, unlike magnets. The gravity has a downward force on mass (which is always constant) and gives us 'weight'. Weight is not a constant and changes as gravity increases or decreases. Magnets do not effect weight.
What do you do when you have a huge crush on a boy who hates you?
Act like you hate them too. Act like your life makes more sense
Which layer of Earth causes Earth to act like a giant magnet?
The outer core layer of the Earth, which is made of molten iron and nickel, is responsible for generating the planet's magnetic field. The movement of the liquid outer core creates electrical currents that produce the magnetic field around Earth.
What would happen to the earth's temperature if a layer of the atmosphere dissolved?
the eath would seriously heat up because of the sun. the atmospheres act like sunscreen. when one of them is taken out, the earth would have a huge spike in heat.
Where do magnet forces act?
Magnetic forces act between objects that have a magnetic field, such as between two magnets or between a magnet and magnetic material like iron. The forces are strongest at the poles of the magnets and decrease with distance.
How is electric force like a magnet force?
They can both attract, or can repel, they can both act over a distance.
What does an electric current act like when it flows through a wire according to Christian Oersted's hypothesis?
a magnet
