Magnets. Magnet An object that pulls certain metals towards it.
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Transcript of Magnets. Magnet An object that pulls certain metals towards it.
Magnetic FieldImage From: http://www.bbc.co.uk/schools/ks3bitesize/science/images/magnetic_fields.gif
North and South
Magnets have two ends, they are also called poles. The poles are named North and South.
2 Types of Magnets
.
• Temporary Magnet – an object that loses its
magnetism after a short time
• Permanent Magnet- an object that keeps its
magnetism for a long time
Earth’s Magnetic Field
Image From: http://oceanexplorer.noaa.gov/explorations/05galapagos/logs/dec22/media/magfield_600.gif
Review
Magnets have 2 _______.
What 4 types of metals do magnets attract?
iron, nickel, cobalt, and steel
poles
Magnets attract _____________.metals
Review
Where are some places you can find magnets?
How does a compass work?The magnet on the compass is attracted to Earth’s magnet
refrigerators, can openers, machinery, etc
Earth is like a giant __________.magnet
Review
To pull together is to ______.
Can 2 like poles pull together?No
attract
To push apart is to ______.repel
Review
Can two opposite poles pull together?
What are the end points on a magnet called?
poles
yes
Why is the earth like a giant magnet?is has melted iron inside
Review
What is molten?
Where is a magnet the strongest?at its poles
melted iron
Which object is not magnetic? steel nail, iron lock, plastic glass
plastic glass