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| #If not attracted by magnet? | | #If not attracted by magnet? |
| #In which direction bar magnet rest when freely suspended it. or magnetic needle or Mariner's compass. | | #In which direction bar magnet rest when freely suspended it. or magnetic needle or Mariner's compass. |
− | #Recognize the north and south poles of magnet. | + | #Identify the north and south poles of magnet. |
| + | #Does every magnet have a north and south pole? |
| #Is north-north or south-south attracted? | | #Is north-north or south-south attracted? |
| #Is north-south repelled? | | #Is north-south repelled? |
| #What happened when kept the bar magnet near the magnetic needle or mariner's compass? | | #What happened when kept the bar magnet near the magnetic needle or mariner's compass? |
− | | + | #What happens when we break a magnet in half? |
| + | #Can you break off just the north (or just the south) end of a magnet? |
| + | #What is the strongest pole? |
| ==Evaluation (Questions)== | | ==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
| + | #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 |
| [[File:magnet3.jpg|200px]] <br> | | [[File:magnet3.jpg|200px]] <br> |
| *Pole of a ________ *pole of b _______ <br> | | *Pole of a ________ *pole of b _______ <br> |
| *Pole of c _________ *Pole of d _________ <br> | | *Pole of c _________ *Pole of d _________ <br> |
− | 2.Draw
| + | #You are in ship at night & have a bar magnet. How do you recognize the east and west direction? <br> |
| + | #Iron feelings are mix with tea powder? How to separate it quickly? |
| + | #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== | | ==Question Corner== |
| #List the properties of magnet. | | #List the properties of magnet. |
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| #What are the properties of the magnetic lines of force? | | #What are the properties of the magnetic lines of force? |
| #Draw the direction of magnetic lines of force of a bar magnet. | | #Draw the direction of magnetic lines of force of a bar magnet. |
| + | #Who discovered magnets? |
| + | #Who were the scientists who helped us to understand magnets? |
| + | #What is magnetite? |
| + | #How does a compass work? |
| + | #Who first used a compass? |
| + | #What are some uses of magnets? |
| '''To link back to the topic page''' | | '''To link back to the topic page''' |
| [[Electromagnetic_induction|'''Back''']] <br> | | [[Electromagnetic_induction|'''Back''']] <br> |