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What is it called when rocks are different because Earths magnetic poles change places?
Magnetic Reversal. Several magnetic reversals have occurred over geologic time.
Magnetic axis that has wandered over time?
Poles
What do strips of low intensity magnetism represent on the ocean floor?
it represents the fact that the magnetic poles of the Earth must "flip" from time to time - the iron in the magma that cools to become the ocean floor aligns with the poles so stripping would show that the poles have changed direction over time. Some scientists suggest the times when the poles "flip" match up with cataclysmic events in the Earths geologic history.
What do strips of low-intensity magnetism represent on the ocean floor?
it represents the fact that the magnetic poles of the Earth must "flip" from time to time - the iron in the magma that cools to become the ocean floor aligns with the poles so stripping would show that the poles have changed direction over time. Some scientists suggest the times when the poles "flip" match up with cataclysmic events in the Earths geologic history.
What will be the position of the freely suspended magnet in a region over the earths magnetic pole?
from south to north
What is it called when rocks are different because Earths magnetic poles change places?
Magnetic Reversal. Several magnetic reversals have occurred over geologic time.
What are the earths colorful bands of glowing light that are given off when solar flames hit the earths atmosphere over the magnetic north and south poles?
Aurora Borealis
Is the earths north magnetic pole wandering?
The Earth's magnetic poles do in-fact 'wander' over the years. Estimates put the movement of the North Pole at 34-37 miles (55 and 60 kilometres) per year. The magnetic poles are not always directly opposite each other. There is a good article on Wikipedia with more information - search for 'north magnetic pole'.
How have switches in the location of earths magnetic poles been determined?
Magnetism leaves particles in molten metals lined up with north and south poles (magnetic poles, not the Earth's poles). Over time different layers of rock show that the N-S and S-N poles have switched, with S pointing in one direction and S pointing in a different direction depending on the age of the rock.
Reasons for Earth magnetic north poles being mapped and why they need to be kept up to date is?
There are no "magnetic north poles", only one. (There is also a magnetic south pole.)The reason is that the magnetic poles change over time.
Magnetic axis that has wandered over time?
Poles
Is earths north magnet pole wandering?
The Earth's magnetic poles do in-fact 'wander' over the years. Estimates put the movement of the North Pole at 34-37 miles (55 and 60 kilometres) per year. The magnetic poles are not always directly opposite each other. There is a good article on Wikipedia with more information - search for 'north magnetic pole'.
What is the magnetic force that attack the shipping lane in The Devil's triangle?
There are no stories that magnetism actually attacks ships. It has however, been observed, that there are magnetic anomolies in the area. The north and south magnetic poles of the earth, are not exactly at the poles, but close enough to be of use over most of the lower lattitudes. The earths magnetic poles can be affected by local rock formations, some actually are the reverse of the main poles, making a magnetic compass point the opposite direction. There are areas in the Bermuda triangle that substantially weaken the normal magnetic field, causing compasses to spin. In fog or poor visibility and storms this can have a disorienting effect on vessels and craft, relying on magnetic compasses.
How have the earth's magnetic poles moved over in the last couple of centuries?
it is moving in clock-wise direction from the poles
Is Earths magnetic field widening?
I am not sure what you mean by widening. The Earth's magnetic field is a result of the fact that the Earth has a molten Iron core and the planet is rotating quite rapidly. The strength of the magnetic field in these circumstances is dependent on the speed of rotation. As the Earths rotational speed is slowing (due to the friction of the tides caused by the moon) the Earth's magnetic field is gradually weakening over geological time scales but this is not significant in terms of human time. The other affect of the rotating Iron core on the magnetic field is what is called field inversions. In the same was as the Sun goes through an 11 cycle of activity during which the N and S magnetic poles flip, the Earth's poles also flip about once every 75-100 thousand years. There is some evidence that the Earth's poles are in the process of flipping at the moment and during this process, in the same was that the Sun develops Sun spots, multiple poles appear at various locations round the Earth. This effect could be said to distort (or widen) the Earths magnetic field.
How does earths magnetic field change over time?
It changes over time through direction and strength. So therefore Magnetic North becomes Magnetic South.
Why does the earths magnetic field change over time?
The Earth's magnetic field changes over time because that is the way that God makes it.
