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10
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Many magnets are made by _______________ that has been magnetised.
iron
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20
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Who discover that electric current can create a magnetic field?
Hans Christian Orsted
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20
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What is a magnetic object?
It is any object attracted by a magnet.
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10
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Tell 4 examples of electromagnets.
TVs, computers, earphones, tablets, ebooks, trains, clocks, fans etc.
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10
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What happen to these magnets?
They attract each other because identical magnets attract each other.
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banana
Go to last place!
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seesaw
Swap points!
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rocket
Go to first place!
Okay!
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baam
Lose 20 points!
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15
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How can I know if a ring is of gold or of nickel?
By using a magnet, if it is attract it then it is made of gold, if not it is made of gold.
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15
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Which are the 4 types of magnets?
Permanent magnets, induced magnets, natural magnets and electromagnets.
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5
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Is an iron bar a magnetic object?
YES
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5
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Is a golden ring a magnetic object?
NO
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eraser
Reset score!
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seesaw
Swap points!
Okay!
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gift
Win 20 points!
Okay!
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lifesaver
Give 5 points!
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15
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How can I know if an object is a real magnet?
By using a known magnet to see if they repel each other, if that happen it is a magnet.
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15
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Say two advantages of the Earth's magnetic field.
Protect us from harmful UV rays and solar wind. It can guide us with a compass.
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5
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Is a nickel ring a magnetic object?
YES
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monster
Reset all scores!
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gift
Win 20 points!
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fairy
Take points!
5
10
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25
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baam
Lose 20 points!
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5
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True or False. In a magnet electrons move in different directions.
False. They move always in the same direction.
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