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y6 unit 6
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Define a permanent magnet?
A permanent magnet always gives off a magnetic force which cannot be turned off
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What do two north and two south poles do to eachother?
repel
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What is an induced maget?
An induced magnet gives off a magnetic forece for a short period of time
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Why does the Earth have a magetic field.
Due to its iron core
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Some natural magnets are found in...
nature
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What are the two things magnets have?
North and south pole
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What is a magnet?
A Magnet is an object which has a magnetic force
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What is needed to turn a magnet into a electromagnet?
Electricity - a power source and a magnet
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What is a benefit of an electromagnet
They can be turned on and off e.g lifting heavy objects
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How does a compass work?
It uses earth's magnetic north pole
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What is a magnetic field?
the area that fills a space where a magnetic force works
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Define an electromagnet
When a magnetic field is created by elecrtricity to turn something into a temporary magnet
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How can we observe a magnetic field?
With iron filings
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What creates an electromagnet an open or closed circuit?
closed circuit
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Electromagnets are permanent magnets? true or false
False
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