0
Wiki User
∙ 14y agoYep. Hundreds of years ago, Chinese warriors used Magnetite (a type of Iron Oxide or Rust) to guide them.
Add your answer:
Earn +20 pts
How did the compass change the earth?
The compass, invented by the Chinese, changed the world many ways. 1. It guided many explorers on voyages like Zheng He on his 7 voyages, one from china to africa, and the well known Colombus to America. 2. Trade flourished around the world because it made long voyages possible 3. It replaced landmarks and stars that couldn't be seen in bad weather etc.
Where are the magnetic North Pole and the geographic North Pole located?
magnetic south pole is closer to the geographic north pole..... that's why north pole of bar magnet when suspended free in air shows the north direction...
How do magnetic poles protect us?
orbit
Who was the first to plot earth's magnetic fields?
Short Answer:Some people would claim that the idea of the map of Earth's magnetic field had to wait until 1600 when William Gilbert published his book, De Magnete and claimed the Earth was a giant magnet. If is more accurate to recognize that a map of the global magnetic field of Earth took petty much a thousand years to assemble and no single person gets credit for the whole thing.Historical Answer:The need for a map of the Earth's magnetic field stems from the difference between magnetic north and true north. Magnetic north is defined by the direction a compass points and true north is the direction of the geographical north pole, the point about which earth rotates on it axis. The difference is called the magnetic declination and it naturally varies depending on the location on earth. At minimum, mapping of the earth's magnetic field would consist of a determination of magnetic declination at various points on a map. In much of Asia, this correction is small, a few degrees. In the US -20 to + 20 degrees. Along the equator, it tends to be a few degrees. In more northern areas, e.g. Canada, the variation is very large. The variation is quite irregular globally and can change some degrees per year.The history of geomagnetism does not record the first map the Earth's magnetic field. It is likely there were no systematic attempts at global mapping until the last century. In 1914 such a map was published in the US for the worlds oceans, but knowledge of the topic is much older. Prior to that there was an accumulation of information, no doubt preserved and valued by travelers and explorers and particularly important for sea going navigation.There are historical records indicating the the the compass was known in China in the 4th century BC though it may not have been used for navigation quite that early. A compass as an indicator of north-south becomes clear only in 80 AD. It is not until 1088 AD in China that it is recorded that a compass did not point to true north. That 1088 even would be the first data point on a map of the Earth's magnetic field. Local data points have been recorded since then.While it is agreed that the Chinese record of the compass predates European records by at least 150 years, there is no agreement as to whether the compass was independently developed or if it traveled from east to west. By the 13th century, it is clear that Europe and China and the Arabic world knew of and used the compass. Given the sophistication of navigation at this point is time, it is certain that local determinations of magnetic declination were recorded and hence more data points for a map.It should be added that mapping of declination is only part of the job. In addition to the variations of a compass towards east or west, there is a vertical variation as well with the field pointing towards or away from the surface of the earth at each location. We do know when those measurements began using the invention of George Hartmann in Germany in 1544.The full mapping requires the strength as well as the direction of the field. An appreciation of the strength of the field of magnets was known for a thousand years, so when William Gilbert published his book, De Magnete, in 1600 and asserted the Earth was a giant magnet, one can reasonable ascribe the complete set of features to the concept of the map of Earth's magnetic field. The theory that the Earth was a giant loadstone was developed by Gilbert and others before 1600 and a tabulation of the Earth's field based on that idea was published in 1590 by Henry Biggs in London. It, of course, did not fully agree with maps of the declination used for navigation at the time because the actual field of the Earth is more complicated than a simple magnet.Nonetheless, a progression of more accurate model and maps developed from the to this day where satellite mapping gives a complete picture of the field and the changes that are occurring each year.
Why is the earth is a big magnet?
Earth has both a positive (North) and negative (South) pole, just like a magnet. This property of Earth is what gives us the ability to us compasses, as the metal in the compass needle is attracted tot he positive pole, thus always pointing north
If magnetic compass does not work on moon Why electric motor work on moon?
No because the Moon does not have a magnetic field like the Earth does. The Earth's magnetic field appears to be created by a liquid metalic out core circulating around a solid core. This works like a dynamo which creates the magnetic field around the Earth. The Moon lacks a similar core stucture. This is also the reason why the Monn has no atmosphere.A magnetic compass would not work on the moon, for the moon does not have the magnetic field that the earth has, allowing us to use this device.No, because moon does not have magnetic force like earth
What compass is Canada in?
The north. We have and own the north magnetic pole. All compass users have to pay us a royalty....ok maybe not.
How navigators and sailors used magnetic compass?
The Earth's magnetic field is what makes the common magnetic compass work. From its invention until the advent of newer technologies beginning around the turn of the 20th century, the magnetic compass, together with the sextant and the chronometer, constituted the primary tools of the navigator. Of course, the compass' primary role was to facilitate steering ships on the right heading under conditions where the Sun and stars could not be seen.
What do you us a compass for?
A magnetic compass is used to find direction and (hopefully) gain orientation. A compass used for drafting or drawing is used in the construction of circles or circular arcs. Use the links below for more pawn
What in the Earth's gravity makes a compass point north?
It has nothing to do with gravity. The core of the earth is magnetic and the earth's north pole is actually magnetic north... at least for a while. Geologists are telling us that the magnetic field is breaking down. There is evidence that the earth has done that a few times in it's history. Some have even claimed that it is actually the cause of global climate change.
Earth revoles on its axis true or false?
Yes, it does though it wobbles a bit. This gives us seasons and the magnetic field that a compass detects.
Who found the evidence of the earth's magnetic field reversal?
The US Navy while performing a careful survey of magnetic compass anomalies in the early 1950s to improve navigation. The data and the survey was originally classified.
How did the compass change the earth?
The compass, invented by the Chinese, changed the world many ways. 1. It guided many explorers on voyages like Zheng He on his 7 voyages, one from china to africa, and the well known Colombus to America. 2. Trade flourished around the world because it made long voyages possible 3. It replaced landmarks and stars that couldn't be seen in bad weather etc.
Where are the magnetic North Pole and the geographic North Pole located?
magnetic south pole is closer to the geographic north pole..... that's why north pole of bar magnet when suspended free in air shows the north direction...
Why is a compass rose more useful in the US than in Europe?
Because in the US your probably closer to the magnetic center of the earth, because earth is a magnet and compasses show your direction through magnetism!
Which color of a compass needle points north?
The US standard is to have the Red point North (look at the rim of the compass, is the 'N' also red or outlined in red?) You should verify this, however, because many things can mess up a compass. I have one that works fine, but White points north because my 4 year old played with a large magnet next to it reversing the polarity. If all else fails, wait for sunrise or sunset. If you look towards sunrise, North is to your Left and South is to your right.
The north pole of a compass magnet points toward?
The north pole of a compass magnet points more or less towards the north.Since opposite poles of a magnet attract, that means that the north pole of the magnet points towards Earth's magnetic south pole, which of course is located towards the north. Confusingly, this magnetic south pole has often been called the magnetic NORTH pole, precisely because it is located towards the north.
