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Unit 5 Electricity and magnetism
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Label the two types of magnets
natural and artificial
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Complete : All magnets has two ...................................
opposite poles
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True or false.When we close the circuit, the obect becomes an electromagnet
true
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Complete : They are also known as temporary magnets
Induced magnets
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Complete : Magnets attract certain metals such as ................................. , ............................. and ................
iron, nikel and cobalt
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Magnets can also be .................... or .........................
permanent and induced
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What is the name of the trains that are made of magnetic levitation?
maglev trains
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...................................... is the relationship between electricity and magmetism.
Electromagnets
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True or false.Opposite poles repel each other
false
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A............................... is a instrument used for finding your way
compass
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Many .............................................. like blenders use magnets to convert electricity.
home appliances
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Complete.We also find naturally magnetic pieces of magnetitte called........................
lodestone
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True or false.All magnetic materials are metallic.
true
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Where did they discover the first natural magnets ?
Ancient Greece and China
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True or false.Magnetic field is the area around a magnet where the force has an effect.
true
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True or false.When we close a circuit , the object becomes an electromagnet
true
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True or false. The compass can tell us about the weather
false
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True or false : The earth has a core of solid iron that acts like a gigant magnet.
false. core of liquid iron
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True or false.Electromagnets are objects that didnt act like magnets when an electrical current passes through them.
false
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