A.  Choose the correct option.

1. Which of the following materials will not be attracted to a magnet?

a. Iron fillings b. A knife c. Wood d. Iron pins

Answer: c. Wood

2. When we run a magnet through iron filings, the iron filings

 a. do not affected by the magnet b. stick uniformly to the magnet c. stick mostly to the poles of the magnet d. stick mostly to the middle of the magnet.

Answer:  c. Stick mostly to the poles of the magnet

3.A freely suspended magnet aligns

a. With the Earth’s East west direction b. With the Earth’s North -south direction c. towards the sun d. towards the moon

Answer: b. With the Earth’s North-South direction

4.Magnets can be made in these shapes.

a. Disc b. Ring c. Bar d. All of these

Answer: d. All of these

5.Magnets may lose their magnetic property if they are

a. dropped from a height b. subjected to heat c. hit with a hammer d. all of these

Answer: d. all of these

B. Write T for true and F for false.

1. A magnet can have only four poles.

Answer: A magnet can have only four poles. — F

2.A magnet can be made with alloys of iron, nickel, and cobalt.

Answer: A magnet can be made with alloys of iron, nickel, and cobalt. — T

3.A magnetic compass can be used to find directions only during a cloudy day.

Answer: A magnetic compass can be used to find directions only during a cloudy day. — F

4.The north pole of one magnet attracts the north pole of another magnet.

Answer: The north pole of one magnet attracts the north pole of another magnet. — F

5.A horseshoe magnet has two poles at the tips and one in the middle.

Answer: A horseshoe magnet has two poles at the tips and one in the middle. — F

6.Bar magnets should be stored in pairs with unlike poles alongside each other.

Answer: Bar magnets should be stored in pairs with unlike poles alongside each other. — T

C. Answer the following.

1.Name two materials that are magnetic.

Answer: Iron and nickel are magnetic materials, meaning they are attracted to magnets.

2.Name two materials that are nonmagnetic.

Answer: Wood and plastic are non-magnetic materials and do not get attracted to magnets.

3.How can we find the poles of a magnet?

Answer: We can find the poles of a magnet by placing it near iron filings; the filings will stick mostly to the poles. Also, a freely suspended magnet’s ends will point towards the North and South directions, marking the poles.

4.What is a magnet compass?

Answer: A magnetic compass is a tool with a tiny magnet (needle) that always points North-South. It helps us find directions.

5.Why does a freely suspended magnet align with the Earth’s North-south direction?

Answer: A freely suspended magnet aligns with the Earth’s North-South direction because the Earth itself acts like a giant magnet, pulling the magnet’s poles to line up with it.

6.How do two magnets behave when they are brought close to each other?

Answer: When two magnets are brought close, their opposite poles (North and South) attract each other, while the same poles (North-North or South-South) repel each other.

7.What are temporary and permanent magnets?

Answer: Temporary magnets only stay magnetic for a short time, like soft iron when it’s near a magnet. Permanent magnets, like bar magnets, keep their magnetic property for a long time.

8.What are the possible actions that can result in the loss of magnetic property of a magnet?

Answer: A magnet can lose its magnetic power if it’s dropped, heated, or hit with a hammer repeatedly.

9.Explain how magnets should be stored so that they retain their magnetic properties.

Answer: Magnets should be stored in pairs with opposite poles (North-South) facing each other, and bar magnets can be stored with a piece of iron, called a “keeper,” to maintain their magnetism.

10.List four uses of magnets.

Answer: Magnets are used in compasses to find directions.

They are used in speakers and headphones to produce sound.

Magnets are found in refrigerators to keep the doors closed.They are used in electric motors to create movement