Loading presentation...

Present Remotely

Send the link below via email or IM

Copy

Present to your audience

Start remote presentation

  • Invited audience members will follow you as you navigate and present
  • People invited to a presentation do not need a Prezi account
  • This link expires 10 minutes after you close the presentation
  • A maximum of 30 users can follow your presentation
  • Learn more about this feature in our knowledge base article

Do you really want to delete this prezi?

Neither you, nor the coeditors you shared it with will be able to recover it again.

DeleteCancel

Make your likes visible on Facebook?

Connect your Facebook account to Prezi and let your likes appear on your timeline.
You can change this under Settings & Account at any time.

No, thanks

Magnets

magnet stuff
by

Matthew Shipman

on 22 January 2014

Comments (0)

Please log in to add your comment.

Report abuse

Transcript of Magnets

A magnet is an object or a device that gives off an external magnetic field.
1. Magnets are attracted to magnetic substances.
2. The magnetic field at the poles of a magnet is greater than at the middle of a magnet.
3. The like poles of magnets repel each other.
4.The opposite poles attract each other.
5. Magnets have two poles, they come in various shapes and attract/repel other magnets.
A ferromagnetic material shows strong magnetic properties.

Magnetic Fields


Properties of a magnet
Magnetic Poles
Magnetic Domains
A magnetic domain is a area within a magnetic material which has uniform magnetization. So this means that the North Pole is magnetic domain. That is why all
compasses point north
.There is magnetic declination which is the difference between the compass's north and the actual magnetic north. A magnetic domain is caused by the magnetic fields of atoms are grouped and aligned. Normally the atoms in a magnet point in random directions.
Magnetic declination is the angle that a compass needle makes with the direction of the geographical north pole at any given point on the earth's surface.
Changes to magnets
Magnets can be hand made from
ferromagnetic material
. Magnets can be broken, destroyed, or made. If you place a unmagnitized object made of ferromagnetic material becomes magnetized if it is put in a strong magnetic field, but most objects easily lose their magnetism like a paper clip and these objects are
temporary magnets
.

Perminent magnts
can be unmagnitized by sticking it hard. this causes the particles to vibrated farster and become unaligned, heat also has the same affect.
If you break a magnet each peice still has a north and south pole. this is because the
magnetic domains
keeps the halves still lined up.
Magnets
Earth's magnetic field
http://en.wikipedia.org/wiki/Magnetic_domain
(n.d.). Retrieved from http://wiki.answers.com/Q/What_are_the_properties_of_magnets
(n.d.). Retrieved from http://physics.tutorvista.com/electricity-and-magnetism/properties-of-magnets.html
Rader, A. (n.d.). Retrieved from http://www.physics4kids.com/
References
Magnetic poles-the region of a magnet toward which the lines of magnetic induction converge (south pole) or from which the lines of induction diverge (north pole)
.

Every magnet has two poles, a north and a south.The north always connects with the south and the south always connects with the north. A north will not connect with a north and likewise with the south pole.

Earth's magnetic field is the magnetic field that extends from the Earth's interior to where it meets the
solar wind, a stream of charged particles emanating from the Sun
.The magnetic field of the Earth deflects most of the solar wind. The charged particles in the solar wind would strip away the ozone layer, which protects the Earth from harmful ultraviolet rays.
Magnetosphere is the outer region of the earth's ionosphere, where the earth's magnetic field controls the motion of charged particles
, like the Van Allen belts.
Van Allen belts either of two regions of high-energy-charged particles surrounding the earth, the inner region centered at an altitude of 2000 miles and the outer region at an altitude between 9000 and 12,000 miles.
The field protects earth from cosmic radiation. This is why we aren't fried to a crisp.Magnetic fields are produced by the motion of electrical charges. For example, the magnetic field of a bar magnet results from the motion of negatively charged electrons in the magnet.

Aurora is a a radiant emission from the upper atmosphere that occurs sporadically over the middle and high latitudes of both hemispheres in the form of bands or streamers, caused by the charged solar particles that are being guided along the earth's magnetic lines of force.
The fields affect neighboring planets along things called magnetic field lines.
Magnetic field lines show magnitude and direction of the magnetic field.
When the lines of the magnetic field are close together the magnetic field is strong.A magnetic object can attract or push away another magnetic object.

This magnetic field is invisible but is responsible for the most notable property of a magnet: a force that pulls on other ferromagnetic materials, such as iron, and attracts or repels other magnets.
A ferromagnetic material is a material that shows strong magnetic properties.
Earth has two magnetic poles,
a true magnetic north and the geographical magnetic north which is the north pole we all know.This is also the same with the south pole.
Magnetic poles are the points where the magnetic field lines begin and end.All magnets have a magnetic force,this is the push or a pull of a magnet. Some magnets have a very strong force, others have a very weak force.

Magnetic fields - attraction for iron; associated with electric currents as well as magnets; characterized by fields of force

Magnetic force is stronger at the poles but is all around the magnet.The magnet fields are the lines that surrounding the magnet, you can see these in the picture below. These line are invisible.Field lines converge or come together at the poles.All magnetic objects have field lines and poles. It can be as small as an atom or as large as a star.
Magnetic objects also have magnetic fields not just earth.
Magnetic fields are produced by the motion of electrical charges. For example, the magnetic field of a bar magnet results from the motion of negatively charged electrons in the magnet.
Magnetic fields are areas where an object exhibits a magnetic influence. The fields affect neighboring objects along things called magnetic field lines. A magnetic object can attract or push away another magnetic object.
By: Ana Minnick ,Nicholas Huemann, and Matt Shipman
The word magnet in Greek means "stone from Magnesia".
The End
Inside a Magnet
Some materials, such as steel in a paper clip or pure iron, are easy to magnetize but lose their magnetism quickly.
A magnetic object that loses its magnetism quickly is a temporary magnet.
Strong magnets are hard to magnetize but tend to stay magnetized.
A material that keeps its magnetism for a long time is a permanent magnet.
Magnets like all things are composed of matter, which means they have
atoms
which is the smallest particle of an
element
.Many atoms are the same but there are a few that are different,every atom has an inner ring and an outer ring.In the inner ring is where the
nucleus
found this is the center of the atom.If you to look into the nucleus you would find two types of particles. These are
protons
and
neutrons
, these are different because a proton carries a positive charge and a neutron does not carry any charge.In the outer ring of the atom you find mostly empty space but there are particles there these are called
electrons
and these carry a negative charge,electrons are smaller than atoms and they also move randomly throughout the atom.










Full transcript