# Activity No # 1 - To check the properties of the magnets

20 minutes

## Materials/ Resources needed

1. Magnets
2. Magnetic needles with stand
3. Mariner's compass

## Process (How to do the activity)

Give the magnets to students and check the properties of magnets. Ask the students properties of magnets. Give two magnets and a magnetic needle to students group (4-5students). Tell check the properties of magnets.
Ask magnetic lines of force using phet tool of magnets and electromagnet.

## Developmental Questions (What discussion questions)

1. What is magnet?
2. Is magnet attracts all materials?
3. What we say the material which are attracted by magnet?
4. If not attracted by magnet?
5. In which direction bar magnet rest when freely suspended it. or magnetic needle or Mariner's compass.
6. Identify the north and south poles of magnet.
7. Does every magnet have a north and south pole?
8. Is north-north or south-south attracted?
9. Is north-south repelled?
10. What happened when kept the bar magnet near the magnetic needle or mariner's compass?
11. What happens when we break a magnet in half?
12. Can you break off just the north (or just the south) end of a magnet?
13. What is the strongest pole?

## Evaluation (Questions)

1. If a magnetic needle placed along the north and south pole of a bar magnet as shown in the figure, what is the polarity of the a b c and d. mark 2

• Pole of a ________ *pole of b _______
• Pole of c _________ *Pole of d _________
1. You are in ship at night & have a bar magnet. How do you recognize the east and west direction?
2. Iron feelings are mix with tea powder? How to separate it quickly?
3. Get a ring-shaped magnet and break it with pliers or a tap with a hammer. Try to put it back together. What happens? Why?

4.

## Question Corner

1. List the properties of magnet.
2. Why magnetic needle or marine's compass always shows north south direction?
3. What are magnetic lines of force?
4. What are the properties of the magnetic lines of force?
5. Draw the direction of magnetic lines of force of a bar magnet.
6. Who discovered magnets?
7. Who were the scientists who helped us to understand magnets?
8. What is magnetite?
9. How does a compass work?
10. Who first used a compass?
11. What are some uses of magnets?

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