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Transcript of Magnets
Permanent magnets are the magnets found on our refrigerator doors. Once they are magnetized they never lose their magnetic field.
Magnet being attracted to cereal
Did you know that magnets can attract to :
dollar bills (american currency)
particles from your breakfast cereal
The reason why is that the objects contain
material, often iron, that is attracted to the magnet.
Types of Magnets
Temporary magnets act like permanent magnets when they are within a strong magnetic field, but lose their magnetism when the field disappears.For example, paperclips and nails are a type of temporary magnets.
An electromagnet is a type of magnet that produces a magnetic field by an
Once the electric field is turned off the magnetic field disappears.
WHAT OTHER THINGS CAN BE ATTRACTED TO MAGNETS?
What are magnetic fields and how do they work?
Dictionary definition- a region around magnetic material or a moving electric charge within which the force of magnetism acts.
Magnetism is an invisible force or field caused by certain materials like iron.In magnets the molecules are uniquely arranged so that their electrons spin in the same direction. This arrangement of atoms creates two poles in a magnet, a North-seeking pole and a South-seeking pole.
How do magnets create electricity?
How are magnets and electricity similar to each other?
Electricity and magnetism are closely related to each other because electricity can create magnetism and magnets can create electricity.Flowing
produce a magnetic field and spinning magnets cause an
to flow. This is called electromagnetism.
Why we need magnetic fields on Earth!
In the center of the Earth we have a solid
of iron and is nearly the size of the moon! Not only does the core produce magnetism it also creates a shield to protect the Earth! The sun pumps heaps of energy called solar radiation to the our Earth and we need this to heat our world, but too much can be harmful for our health and strip away huge amounts of our atmosphere.
Thank you for attracting to this presentation and not repelling!
*words highlighted in blue are the words in my glossary
Particles- A small portion of something.
Ferrous- Contains or consists of iron.
TNT- A high and dangerous explosive.
Flare- A sudden burst of a bright flame or light.
Core- The central region of a planet, especially the inner part of the earth.
Electron- A stable particle with a charge of negative electricity.
Electric current- An electric current is a flow of electric charge.
Magnets are used in generators to create electricity. Their role is to push electrons along a wire and a voltage is produced.In a generator, a magnetic field pulls and pushes electrons into objects near them to make them move. If a magnet is moved quickly through a coil of copper wire, electrons move and electricity is made.
How do magnets create electricity?