0
Want this question answered?
Be notified when an answer is posted
Add your answer:
Earn +20 pts
What is happening to earths magnetic field?
In early 2014, scientists have discovered that the Earth's magnetic field has been weakening for some time. This could eventually lead to the switching of the Earth's magnetic poles.
Does the earths magnetic field has periodically reversed direction?
Yes. In historical times , clay pots have shown that the earth's magnetic field has reversed.
Has earths magnetic field ever moved or changed?
Yes. The Earth's magnetic field changes and has flipped in historical times. Velikovsky noticed this in examining the magnetic oruientation of ancient pottery.
How can scientist tell that earth's magnetic field sometimes reverses direction?
You don't have to be a scientist to observe that fact. All you have to do is take any magnet and hang it up on a thread, so it's free to rotate and point wherever it wants to point. When you do that, you find that every magnet that's free to turn always turns to point at the same place ... a spot in far northern Canada. When you do this experiment with thousands of magnets in thousands of places all over the earth, and keep records of the direction that magnets point in various places, it all goes together to give a beautiful diagram of the earth's magnetic field. People who do a lot of traveling over long distances have used this fact for thousands of years to build a device that helps them find their way around the surface of the earth. The device is called the 'magnetic compass'.
Is there a polarity in an alternating current circuits?
Yes and it reverses many times every second, how many times it does this is called its frequency.
There is evidence that the magnetic polarity of the earth has shifted several times in the past. what is the cause of this?
we do not know the cause
What is happening to earths magnetic field?
In early 2014, scientists have discovered that the Earth's magnetic field has been weakening for some time. This could eventually lead to the switching of the Earth's magnetic poles.
Does the earths magnetic field has periodically reversed direction?
Yes. In historical times , clay pots have shown that the earth's magnetic field has reversed.
Has earths magnetic field ever moved or changed?
Yes. The Earth's magnetic field changes and has flipped in historical times. Velikovsky noticed this in examining the magnetic oruientation of ancient pottery.
What do bands of rock on the seafloor showing alternating magnetic orientation indicate about the earths magnetic field?
They indicate that the Earth's magnetic field has undergone shifting of the positions of it's poles several times in the past.
Earths magnetic poles reverse approximately every years?
The process of the reversal of the Earth's magnetic poles is called a magnetic flip. This occurs every 4 or 5 times per million years.
During various times in the geologic past the polarity of Earth's magnetic field has been reversed - True or False?
True. These are known as magnetic reversals. Please see the related link for more information.
The alignment of iron-bearing minerals in rocks when they formed reflections the fact that earths has reversed itself several times in its past?
magnetic field .
What best describes earths north magnet?
Our planet behaves as though a giant bar magnet is buried deep within the earth, and lying slightly out of alignment with the earth's axis of rotation. The points where this imaginary bar magnet's magnetic field lies perpendicular to the earth are named Magnetic North and Magnetic South respectively. These points do not coincide with the earth's geographic poles, which are called True North and True South respectively. It's very important to understand that 'Magnetic North' and 'Magnetic South' describe locations, and have nothing whatsoever to do with their magnetic polarities. In fact, these locations are not fixed, but constantly move relative to True North and True South, and the locations must be taken into consideration for the purpose of navigation.A freely-suspended magnet (or a compass needle) will align itself with the earth's magnetic field and will always come to rest pointing in a Magnetic North - Magnetic South direction. Because of this, one end of the magnet was originally named its 'North-Seeking Pole', while the other end was named its 'South-Seeking Pole'. Over time, we have dropped the word 'seeking' from these expressions, and now call the ends of a magnet (or compass needle) its 'north pole' and its 'south pole' which, by common consent, are used to identify the magnetic polarities of a magnet. Because 'unlike poles attract', this means that the magnetic polarity of Magnetic North (i.e. the location) must be a south pole, and the magnetic polarity of Magnetic South must be a north pole.To summarise, the terms 'Magnetic North' and 'Magnetic South' are locations so-named to differentiate them from 'True North' and 'True South' for the purpose of navigation. Because the north pole of a magnet or compass needle is attracted towards Magnetic North, that location's magnetic polarity is south. And, of course, the magnetic polarity of Magnetic South location is north.From geological records obtained from magnetized rock strata and other natural materials, it is well-known that the magnetic poles have actually "flipped over" several times during the many aeons of the earth's long history (although not during man's existence). Should this do so again in the future, it will have no affect whatsoever on the locations or on naming of 'Magnetic North' and 'Magnetic South', although their magnetic polarities will, of course, reverse!For more information see the Related links shown below.
Is the ocean floor made out of a pattern of magnetized strips?
Yes, the igneous rocks of the ocean floor exhibit a pattern of oppositely polarized magnetic strips. This demonstrates that the earth's magnetic field has reversed polarity (i.e. swapped north and south poles) several times in the past.
Will the earths magnetic poles ever switch causing a polar shift?
This has happened several times in the past at irregular intervals, so it seems likely it will happen again in the future.
How can scientist tell that earth's magnetic field sometimes reverses direction?
You don't have to be a scientist to observe that fact. All you have to do is take any magnet and hang it up on a thread, so it's free to rotate and point wherever it wants to point. When you do that, you find that every magnet that's free to turn always turns to point at the same place ... a spot in far northern Canada. When you do this experiment with thousands of magnets in thousands of places all over the earth, and keep records of the direction that magnets point in various places, it all goes together to give a beautiful diagram of the earth's magnetic field. People who do a lot of traveling over long distances have used this fact for thousands of years to build a device that helps them find their way around the surface of the earth. The device is called the 'magnetic compass'.
