Vocabulary Week 1 – On-Level Class You need 10 Index Cards Magnetism 4.1 Vocabulary Week 1 – On-Level Class You need 10 Index Cards

Magnetism a physical phenomenon produced by the motion of electric charge, resulting in attractive and repulsive forces between objects.

https://www.youtube.com/watch?v=hFAOXdXZ5TM

Magnetic Field Magnetic fields are areas where an object exhibits a magnetic influence. The fields affect neighboring objects along things called magnetic field lines.

Magnetic Domain * A region within a magnetic material in which the magnetization is aligned and pointing in the same direction. https://www.youtube.com/watch?v=QgwReDkpq6E

Magnetosphere Earth’s magnetosphere is the region of space where the Earth’s magnetic field is confined by the solar wind plasma, blowing outward from the Sun. The magnetosphere prevents most of the particles from the Sun, carried by solar wind, from hitting the Earth. This asymmetrical region surrounds Earth, extending from about one hundred to several thousand kilometers (about 36,000 miles) above the surface.

The picture illustrates the magnetosphere and labels several of its key components. https://www.youtube.com/watch?v=a76xtylLYRk

Magnetic Induction Electromagnetic induction is the production of an electrical potential difference (or voltage) across a conductor situated in a changing magnetic field. Michael Faraday was the first to describe this phenomenon. http://thekidshouldseethis.com/post/80799274938

Metals A metal is a material (an element, compound, or alloy) that is typically hard, opaque, shiny, and has good electrical and thermal conductivity.

Ferrous Metals Ferrous metals and alloys contain iron; non-ferrous materials do not. Examples of Ferrous Metals Mild Steel –Used for engineering purposes. Carbon steel –Used to make cutting tools such as drill bits. Stainless Steel – Made up of Iron, nickel and chromium. Resists staining and corrosion and is used to make cutlery and surgical instrumentation. Wrought Iron – Composed of almost 100% iron. Used to make items such as ornamental gates and fencing. Cast Iron – Used to manufacture items such as engine blocks and manhole covers.

Permanent Magnet A magnet that retains its magnetism after removal of the magnetizing force. Permanent magnetization of a material involves its electrons and how they move around their nucleus.

Example of a Permanent Magnet A "horseshoe magnet" made of alnico, an iron alloy. The magnet is made in the shape of a horseshoe to bring the two magnetic poles close to each other, to create a strong magnetic field that can pick up heavy pieces of iron.

Temporary Magnet Act like permanent magnets when they are within a strong magnetic field. Unlike permanent magnets however, they loose their magnetism when the field disappears.

Magnetic Poles Either of the two ends of a magnet at which the field of the magnet is most intense. Like magnetic poles repel; opposite magnetic poles attract. The poles of a magnet are the two ends of the magnet where the charge is different. One side is north; the other is south. https://www.youtube.com/watch?v=DR9w4koW2EA