Concepts, Theories and Unknowns Aspects of Magnetism
Magnetism has long been one of the great mysteries of the world. It has gone for so long unexplained and although there has been a lot of progress in figuring out how magnetism works and what it’s caused by, it still isn’t completely understood. There are many theories about magnetism, but there is still much more yet to be discovered about magnetism. In the future it will probably be easily understood, but none the less intriguing.
Magnets have intrigued people for a long time; they were discovered long ago. Certain rocks and ores of iron called lodestones were found. These lodestones which were naturally magnetic rocks made of the mineral magnetite, were so mysterious to
…show more content…
Lucretius (99-55 BC), a roman poet and philosopher, was one of the first to observe that a loadstone or magnet stone could both attract and repel other magnets. For about thirteen hundred years after Lucretius, scholars insisted that certain magnets possessed the property of attraction while others possessed the property of repulsion. To their minds, it did not seem possible that the same magnet could both attract and repel other magnets. Gradually it became evident that the two ends, or poles of a magnet are unlike in certain respects. Roger Bacon (1210-1294), an English philosopher and scientist pointed out that magnets could repel as well as attract other magnets.
In 1600, William Gilbert, an English doctor, proposed that the earth was like a giant magnet. He had been experimenting with round pieces of magnetite and magnetized needles when he realized that the magnetite was attracting the needles in a way similar to the earth’s attraction of a compass needle. William Gilbert was also the first to call the ends of the magnets poles.
William Gilbert's idea that the earth is a giant magnet turned out to be basically true. The earth is thought to obtain its magnetism from electricity made by molten iron and nickel sliding around inside it. The Earth’s magnetism is centered at an area in northeastern Canada by the North Pole (another center is by the South Pole). The needle of a compass points not to the top of the earth but to the magnetic north pole
What is magnetism? When two pieces of iron are attracted to each other by physical means or electrical means.
1. Move the compass slowly along a semicircular path above the bar magnet until you’ve put it on the opposite side of the bar magnet. Describe what happens to the compass needle.
William gilbert was an astronomer, English physician, and a physicist. Also know as the”father of electricity”. His parents were Hierome Gilbert and Jerome Gilbert. He had four books published in his lifetime which one of them were about how he did his experiments and all of his findings about the earth and its magnetic forces. William Gilbert was born May 24, 1544 in Colchester, England. He went to St John’s college and Cambridge University he later gained a MD from the St John’s college, Cambridge. He left from there and went to London to practice medicine.He spent is life in Pinner, London.He published a book in the 1600’s showing all of his work and experiments on how the earth was magnetic.He described his experiments with his model earth
The data amassed by the scientist revealed that the Mid- Atlantic Ridge and the East Pacific Rise and countless other locations on the ocean floors display the same arrangements of varying magnetic stripes. As new volcanic rock erupts through fractures on the floor of the ocean, a progression identified as seafloor spreading, which causes the seafloor to widen (Trefil & Hazen, 2010). This new rock will be pushed aside as the continents are moved apart and as more magma comes up to take its place. The iron ore in this latest rock will steer to the position of the magnetic north pole once they get through to the top. Every occasion, that the planet’s magnetic field moves in the opposing direction, the dipole course of the planets magnetic field adjust and becomes encased in the recently constructed rock (Trefil & Hazen, 2010).
James Hutton was the first scientist to address the Earth was millions of years old, as well as alive and is continuously being formed. Charles Lyell popularized uniformitarianism, and believed the Earth was being shaped by slow moving forces. Alfred Wegener introduced the foundation for the theory of continental drift. Wegener was one of the first to recognize and have an understanding of how the Earth works which required data and information from earth sciences. In the 1960s, the theory for the continental drift became known as the theory of plate tectonics or plate building.
Bill Nye Resources on Magnets and Magnetism: http://billnye.com/billnye_resource/magnetism/ (Links to an external site.)Links to an external site. and https://vimeo.com/121217374 (Links to an external site.)Links to an external site.
The canadians did a great deal of the examination on how magnets function, they learnt how to demagnetize so they could construct the bodies of their pontoons without being attractive. Thusly they wouldn't get grabbed on a few radars, and they additionally wouldn't pull in attractive landmines, they likewise could discover
William Gilbert studied magnetism in the Elizabethan Era. Gilbert was born in England in 1544 (Rich). According to an article written by A.V. Helden, Gilbert attended Cambridge University in 1558. He got his B.A. in 1561, his M.A. in 1564, and his M.D. in 1569 (Helden). Gilbert made discoveries mainly in magnetism. He published a book called De Magnete, which is all about how magnetism affects the world. One of the topics covered in the book was compasses because they were important for the explorers of that time.
The first compass was made with lodestone, it a naturally magnetized piece of the mineral magnetite. Chinese fortune teller used lodestone to build their fortune
During the 16th century, Nicolaus Copernicus was a very influential astronomer, whom Galileo Galilei, an aspiring scientist in that field, admired and studied diligently. Copernicus theorized that the Earth rotated around the sun, also known as the heliocentric theory (Paolucci and Brophy). This was in contrast to the Ptolemaic theory (and Catholic doctrine) that everything else in our galaxy pivoted around the Earth. Galileo spent his life attempting to prove the Copernican Theory.
Rodriguez was a small round magnet that had a small hole right straight in the middle of him. Lots of other magnets had a hole in the middle of them but he was different. He was the only circle magnet and he was also the only magnet in the whole world to not have an eye inside of the hole in him.
Franklin realized that if a piece of silk were rubbed against a glass, the glass would have a positive charge. Other scientists at that time believed that rubbing produced electricity, however Franklin said that it was just the "electric fluid" being transferred from the silk to the glass. This is known today as the law of conservation of change and it is one of the basic principles of physics.
The tectonic plate model project was a fun, yet informative project that showed students how to effectively move things from one place to another and also how Pangaea moved to how it is today. By using two big foam boards, big blue sheet, artificial grass sheet, magnets, tape, copy paper, and pencils, we were able to create an accurate representation of how Pangaea moved from over 4 billion years to now. How we created this project was by using magnets. Magnets are very versatile and we attached them accordingly onto the continents and poster board to create a moving project of Pangaea. By gluing magnets onto each continent and the blue sheet, we were able to create moving continents that show Pangaea’s movement.
Earth is in fact an intricate planet that has multiple layers of differing compositions. To be exact the earth has four main layers. The uppermost layer is the one humans come in most contact with, the crust. The crust consists of “thin silicate rock material”(Structure of the). Although the crust is not entirely the same. Actually there are two distinct types of crust, oceanic and continental. “The continental crust is made up of mostly rocks similar to granite while the oceanic crust is much denser and made up of a material similar to basalt”(Structure of the, Rose). The second layer is called the mantle. “The mantle is much denser than the crust and contains similar to the crust mostly solid silicate crust”(Structure of the). “As we travel further down the earth we wind up in the outer core. The outer core is a core of molten nickel and iron. Finally there’s the inner core. The inner is a solid metal core made up of nickel and iron”(Structure of the). All these layers functioning together cast out a magnetic
An electricity and magnetism phenomenon apparently unrelated to power are electrical magnetic fields. We are familiar with these forces through the interaction of compasses with the earth's magnetic field, or through fridge magnets or magnets on children's toys. Magnetic forces are explained in terms very similar to those used for electric forces: