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what is a electromagnet ?
A electromagnet is a magnet made by wrapping coils of wire round a iron or steel core and attaching it to a battery
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what is a advantage of a electromagnet?
you can turn it off?
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what do you use to find a magnetic field?
iron fillings
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what is a composite material ?
A material with more than one materiel
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Example of a composite material?
Carbon fibre made up of carbon fibres and a glue like polymer
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what is a polymer ?
a polymer is a substance with very long molecules. a polymer is a identical group of atoms repeated many times.
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what is a natural polymer ?
a natural polymer is something made my plants an animals
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example of a natural polymer
wool because sheep produce it
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what is a synthetic polymer ?
synthetic polymers are made by chemical reactions that are developed by scientists
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example of a synthetic polymer
a plastic bag because it is made out of polyethylene
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properties of polyethylene
take ages to wear down . strong and flexible
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two types of polyethylene
low density and strong density
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what is polyvinyl chloride
is are waterproof flexible used in waterproof clothing
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Other cards in this set

Card 2

Front

what is a advantage of a electromagnet?

Back

you can turn it off?

Card 3

Front

what do you use to find a magnetic field?

Back

Preview of the front of card 3

Card 4

Front

what is a composite material ?

Back

Preview of the front of card 4

Card 5

Front

Example of a composite material?

Back

Preview of the front of card 5
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