sailors find direction using___when the sky is overcast.
Answers
Answer:
Magnetic compass
Explanation:
The magnetic compass is used by the sailors to find direction. It consists of a freely movable bar magnet that aligns along Earth's north-south direction.
Magnetic Compass
Magnetic compasses are the most familiar type of compass. They have become so popular that the term "compass" almost always refers to a magnetic compass. Although the design and construction of this type of compass has changed significantly over the centuries, its principle of operation has remained the same. Magnetic compasses consist of a magnetized needle that is allowed to rotate so that it is aligned with the Earth's magnetic field. The ends point to so-called magnetic north and magnetic south.
Scientists and historians do not know when the principles behind the magnetic compass were discovered. The ancient Greeks understood magnetism. As early as 2,000 years ago, Chinese scientists were able to learn that rubbing an iron rod (like a needle) with a naturally occurring magnet called a lodestone temporarily magnetizes the needle to point north and south.
Very early compasses were made of a magnetized needle attached to wood or cork, which floated freely in a bowl of water. As the needle settled, the marked tip pointed to magnetic north.
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