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Q: What is used to make compass needles because it is magnetic?
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List the cause and effect connections between the Chinese invation of the Magnetic compass and Zheng He's voyage?

The cause is the Chinese invention of the magnetic compass. The effect is the voyage of Zheng He. The invention of the magnetic compass allowed Zheng He to make his voyage.


Why is it a bad idea to make the compass housing out of iron?

Iron is magnetic


What type of fluid using in saracom magnetic compass model MC180?

i have a saracom magnetic compass & it has big bubble inside. i have to remove bubble.what type of fluid i have to use, compass make: SARACOM model: MC180


A compass is a scientific instrument used to locate what?

A compass is a scientific instrument used to locate the north magnetic pole. The magnetic changes in the Earth's core make the north magnetic pole move over time.


When was the Chinese magnetic compass invented or made?

To invent something you have to make it. It was invented.


What do you have to add to a compass to make it in line with the earths magnetic field?

Nothing. That's exactly what a compass does ... as long as it's free to turn, and there are no ferrous metals or other sources of magnetic fields nearby.


Why is it important to take declination into account of you are traveling with a compass?

Unlike the geographic poles, which are always in the same place, the magnetic poles change location throughout the history of earth. So when using a compass to map or explore the Earth's surface, you need to make a correction for the difference between geographic nor and magnetic north.


How can you make your own magnetic compass?

Did this at school http://www.madsci.org/experiments/archive/860218908.Es.html


What characteristic of iron would make it a bad material for the housing around a compass?

It could not be used because it attracts magnets and a compass is a specialist form of magnet, utilising the magnetic properties of the earth to give a reading. Compass housings are invariably made of brass, aluminium or plastic.


What characteristic of iron would make it a bad material for housing a compass?

It is magnetic and would throw off your little dial


When using a compass to map an area why is it important to know an areas magnetic declination?

Unlike the geographic poles, which are always in the same place, the magnetic poles change location throughout the history of earth. So when using a compass to map or explore the Earth's surface, you need to make a correction for the difference between geographic nor and magnetic north.


Why did the europeans make astrolabe and magnetic compass?

it allowed european nations to undertake transoceanic voyages without fear of getting lost