Match the following: Column A Column B 1 . A naturally occurring magnet a. Horse-shoe magnet 2 . An artificial magnet bent in the form of U b. Lodestone 3 . The end of a freely suspended magnet which points towards north c. Magnetic compass 4 . A magnetic device used for finding geographic directions d. Natural magnet 5 . A magnet which occurs naturally and is not made by any artificial means. e. North pole.

1 . A naturally occurring magnet - b . Lodestone Lodestone is a natural magnet. 2 . An artificial magnet bent in the form of U - a . Horse-shoe magnet The horseshoe magnet is in U shape. 3 . The end of a freely suspended magnet which points towards the north - e . North pole Northpole of the suspended magnet always points towards the geographic north. 4 . A magnetic device used for finding geographic directions - c . Magnetic compass A magnetic compass is a simple device used by the pilots and navigators to find the direction in which their ship or aeroplane is travelling. 5 . A magnet which occurs naturally and is not made by any artificial means - d . Natural magnet A magnet which occurs in nature and is not made by any artificial means is called a natural magnet. Column A Column B 1 . A naturally occurring magnet b. Lodestone 2 . An artificial magnet bent in the form of U a. Horseshoe magnet 3 . The end of a freely suspended magnet which points towards north e. North pole. 4 . A magnetic device used for finding geographic directions c. Magnetic compass 5 . A magnet which occurs naturally and is not made by any artificial means. d. Natural magnet

Match the following. ATM cards Repel each other Like poles Hammering/heating Unlike poles Magnetic strip Demagnetisation Attract each other Center of a magnet Permanent magnets Least magnetic force

ATM cards- magnetic strip An ATM card has a magnetic strip. The magnetic strip of the card is capable of storing data by modifying the magnetism of tiny magnetic particles on a band of magnetic material on the card. Like poles- repel each other Like poles repel each other. If the north pole of a magnet is brought close to the north pole of another magnet, they experience a repulsive force. Unlike poles-Attract each other Unlike poles attract each other. If the north pole of a magnet is brought close to the south pole of another magnet, they experience an attractive force. Demagnetisation- Hammering/heating A magnet can be demagnetised by heating or hammering. Demagnetisation is the process of removing magnetism from a substance. Centre of a magnet- Least magnetic force The magnetic force is the least at the centre of the magnet and the strongest at the poles of the magnet. ATM cards Magnetic strip Like poles Repel each other Unlike poles Attract each other Demagnetisation Hammering/heating Centre of a magnet Least magnetic force

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What do you mean by Natural magnet and Artificial Magnets?

Important Questions on Magnetism

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Science>Physics>Magnetism>Natural Magnets and Artificial Magnets

What are the differences between permanent and temporary magnets?

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Science>Physics>Magnetism>Natural Magnets and Artificial Magnets

What do you understand by the term natural magnet?

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Science>Physics>Magnetism>Natural Magnets and Artificial Magnets

Write two uses of magnets.

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Science>Physics>Magnetism>Natural Magnets and Artificial Magnets

Name any two modern devices in which magnets are used.

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Science>Physics>Magnetism>Natural Magnets and Artificial Magnets

Match the following:

Column A	Column B
$1 .$ A naturally occurring magnet	a. Horse-shoe magnet
$2$ . An artificial magnet bent in the form of U	b. Lodestone
$3 .$ The end of a freely suspended magnet which points towards north	c. Magnetic compass
$4 .$ A magnetic device used for finding geographic directions	d. Natural magnet
$5 .$ A magnet which occurs naturally and is not made by any artificial means.	e. North pole.

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Science>Physics>Magnetism>Natural Magnets and Artificial Magnets

Shashi was rolling a bar magnet in fine sand. She pulled out magnet from the sand and noticed fine grey particles sticking on the ends of the magnet. However, no particles were sticking in the middle of the magnet. She wanted to know the basic facts clarified such observation with basic facts.

Answer the following questions based on above information :

What are the values displayed by Shashi in sharing her observation with her father?

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Science>Physics>Magnetism>Natural Magnets and Artificial Magnets

What do you understand by the term 'magnetic induction'?

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Science>Physics>Magnetism>Natural Magnets and Artificial Magnets

List two properties of a magnet.

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Science>Physics>Magnetism>Natural Magnets and Artificial Magnets

What will happen if the earth loses its magnetism? Enumerate various effects of this on a magnet.

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Science>Physics>Magnetism>Natural Magnets and Artificial Magnets

Look at the magnetic pendulum. The pendulum has a magnet and there are a few magnets on the board too. The pendulum does not move in a fixed direction. What is the reason behind it?

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Science>Physics>Magnetism>Natural Magnets and Artificial Magnets

What is magnet? How does a permanent magnet differ from a temporary magnet? Name two materials from which permanent magnets are made.

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Science>Physics>Magnetism>Natural Magnets and Artificial Magnets

Tell any four uses of magnets.

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Science>Physics>Magnetism>Natural Magnets and Artificial Magnets

Name a few devices in which magnets are used.

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Science>Physics>Magnetism>Natural Magnets and Artificial Magnets

Match the following.

ATM cards	Repel each other
Like poles	Hammering/heating
Unlike poles	Magnetic strip
Demagnetisation	Attract each other
Center of a magnet	Permanent magnets
	Least magnetic force