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Subject:

science-physics

Class:

class VI

Key Concepts

compass, magnet, magnetite, north pole, south pole

essential questions

1. Why do magnets attract and repel each other?
2. What common objects are attracted to magnets?
3. Why are magnets essential in our everyday lives and how do they help us?

Remembering:

  1. List two ways in which you can make a magnet.
  2. List two properties of a magnet.
  3. ___ is the only natural magnet.  a) magnetite   b) ebonite  c) cobalt  d)  nickel
  4. Which of the following cannot be used to make a magnet: a) cobalt  b) iron  c) nickel  d)  ebonite
  5. Which of the following is not a non magnetic substance: a) glass  b) wood  c) china ware  d) nickel
  6. Which of the following gets attracted to a magnet: a) paper  b) sliver   c) iron nail  d)  comb
  7. Fill in the blanks:
  1. When north pole of one magnet is brought near the ___ of another magnet, they attract one another.
  2. When the north pole of one magnet is brought close to the ___ of another magnet, they repel each other.
  3. Similar poles of two magnets ___  one another.
  4. A compass needle always points in a direction____
  5. Stickers with pieces of magnet inside them easily stick to___ surfaces like the doors of refrigerator
  6. Materials which get___ towards magnet are known as magnetic
  7. The___ of magnet where maximum iron filings get clung, ape known as____
  8. Magnetic effect can pass through___
  9. We should not drop the magnet, should not heat it, should not __ it
  10. The south pole of the earth’s magnet is near the geographical___ pole
  11. Magnetic poles always___ in pairs.
  12. Hammering destroys the ___ of small magnets inside

2. State whether true or false:

  1. Lodestone is composed of oxides of iron.
  2. North and South poles are found to exist separately.
  3. Magnetite doesn’t show magnetic properties.
  4. If we cut a bar magnet in two halves we will have two magnets
  5. Heat can destroy magnetic properties of a magnet.
  6. Magnets are made up of different materials and in different shapes.
  7. Compass needle is made of a magnet
  8. There is a maximum attraction in middle of a bar magnet

understanding:

  1. Write the difference between magnetic and non magnetic materials.
  2. What are some of the uses of magnets in our daily life?
  3. When a magnet is suspended freely it always aligns itself in____ direction:  a) North   b) N-S   c) N-W   d) N-E
  4. Read the following table and answer the questions:                                                                                                        P- Magnet   Q- Magnetic substances   R- Non magnetic substances                                                         A few examples of substances are given below:  Iron, cobalt and nickel  To which group do they belong:   a) P        b) Q      c) R      d) P and R
  5. Read the following table and answer the questions:                                                                                                        P- Magnet   Q- Magnetic substances   R- Non magnetic substances                                                           To which group does a ring made up of copper belong to:     a) P    b) Q  c) R  d) Either Q or P
  6. What is a natural magnet known as: a) toroid   b) lodestone  c) hematite  d) solenoid
  7. Which of the following statement is true: a) north pole of a magnet will attract the north pole of another magnet  b) artificial magnets can be made from non- magnetic material also   c) lodestone is an artificial magnet  d) isolated magnetic poles do not exist
  8. Study the given statement. i) a compass is used to show the directions   ii) the needle of a compass is magnetic  iii) needle of a compass always indicates the north and south directions of the earth. identify the correct statements:  a) only i and ii   b) only ii and iii   c) only i and iii  d) all three
  9. When a magnet is placed on a plastic plate with common pins spread on it then___   a) Pins stick all around the magnet   b) pins stick at the middle of the magnet  c) pins stick at the ends of the magnet  d) none of these
  10. The North end of the freely suspended magnet points towards:  a) geographical north  b) geographical south  c)  geographical east   d) geographical west
  11. When a S pole magnet is brought near the N pole of a freely suspended magnetic needle, then it___:  a) repel  b) rotates  c) attracts  d) none of these
  12. Reena has one bar magnet, two iron pieces  and all of them are of the same size and shape. Which of the following can be used for identifying them: i) another magnet   ii) a compass  iii)  a piece of thread     a)  only i and ii   b) only ii and iii  c) only i and iii  d) all the three
  13. Which of the following shapes of a magnet are possible:   a) Only P and Q   b) only P and R   c) Only Q   d) All of these

Application:

  1. Think of two ways in which you make a compass of your own. Write in detail the material required and how you will make them.
  2. Neeraj has a small piece of metal and a thread. He wants to find whether the metal is a magnet or not. Which of these he would require: a) a piece of magnetic substance   b)  a magnet or a compass   c) a piece of nonmagnetic substance   d) he does not require anything else
  3. Heema placed a magnet near a metal ball and observed that the ball moved away. What does she conclude about the metal ball: a) it is made up of nickel   b) it is made up of silver   c) it is a magnet   d) none of these
  4. Why does a compass always point to the north direction: a) compass is made up of a magnetic field   b) compass is a magnet with the pointer seeking the south pole of the earth   c) compass is a magnet with the pointer seeking the north pole of the earth  d) compass is an electromagnet that is charged by rubbing
  5. Two magnets are placed close to each other as shown below. Which set will attract each other:                              a) b)  c)  d)

Analysis:

  1. A weak magnet Q is placed near a strong magnet R as shown in the figure How will the magnets move: a) R will move away   b) Q will turn in clockwise direction   c) R will turn in anti-clockwise direction   d) Both Q and R will  turn clockwise
  2. A magnetized a piece of iron marked using the stroking method as shown in the figure, Which of these parts  of the iron piece will become the north seeking pole :  a) Q    b) R   c) it does not matter the whole iron piece becomes a magnet   d) cant say
  3. Paheli brings a magnet near couple of pins made up of different materials. Pins P and Q get attracted whereas pins R remain in the bowl. What are the pins P Q and R likely to be made of: a) P- Iron   Q- Nickel  R- Cobalt   b) P-Iron   Q- Cobalt  R- Nickel   c)P- Cobalt   Q-Nickel  R- Aluminum   d) P-Copper  Q- Brass  R- Nickel

Evaluation:

  1. You and your friends are in a camp and have been given a task to find your way back to the base. In your backpack you have been given following things to help you find your way back a map, flask with water, a cork, couple of nickel pin a small circular magnet and a piece of thread. The map has only forest features marked on it some clues that have directions written on them. To understand the clues you need to have a compass which unfortunately is not given. How will you find your way back to the base.

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