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Does the earths magnetic field has periodically reversed direction?
Wiki User
∙ 11y ago
Yes. In historical times , clay pots have shown that the earth's magnetic field has reversed.
Wiki User
∙ 11y ago
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Do bats use the earths magnetic fields?
no
Earths magnetic field does not affect what?
Other planets
How can you magnetise a needle?
There are several ways. 1. Stroke the needle in one direction, with another magnet. 2. Place it in a coil of wire and pass a large (DC) current through the coil for a few seconds. (This is how they would do it commercially) 3. Align the needle with the magnetic north/south direction, now hit it several times. It will eventually take on the earths magnetic field as it's own.
What gives rise to the Earths magnetic field?
Current flows inside he Earth.
What do scientists think produces earths magnetic field?
Its molten iron core.
Switch in direction of earths magnetic north and south poles?
Magnetic Reversal
About how long ago was the last time earths magnetic field reversed?
About 41,000 years ago.
Earths magnetic field can make a magnet out of an iron bar by causing the magnetic domains to?
align in the same direction, creating a magnetic field within the iron bar. This alignment occurs due to the interaction between the Earth's magnetic field and the magnetic properties of the iron, resulting in the iron bar becoming magnetized.
Why are magnet patterns important evidence for plate tectonics?
magnetic rocks on the ocean floor show that the Earths magnetic field has been frequently reversed forming new sea floor.
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 .
How does earths magnetic field change over time?
It changes over time through direction and strength. So therefore Magnetic North becomes Magnetic South.
Why do scientists think that earths' magnetic field has not always pointed north?
Every 100,000 years or so, the Earths magnetic field shifts direction. North becomes south, south becomes north.
Why are the seasons reversed in the northern and southern hemisphere?
Because Earths axis is tilted.
How a magnetic compass can be used to find directions on Earths surface?
A compass is an instrument containing a freely suspended magnetic element which displays the direction of the horizontal component of the Earth's magnetic field at the point of observation.
How long ago did the earths magnetic field reverse itself?
The last time that Earth's magnetic field reversed itself was 780,000 years ago. See the related link for two timelines showing geomagnetic reversals in Earth's history.
Minerals in igneous rocks can show the direction of earths?
The Earth magnetic field changes approximately every 200,000 thousand years.
The possible source of earths magnetic core is?
The molten iron and medals inside the earths core are the reasons for the earths magnetic core.
