Magnets and the forces of attraction
Class 6, 7, 8 & 9
Key Learning Objectives
1 Hour (Approximately)
- THE MISSION
The student has to play the role of a magnet hunter where the player is send on a mission to a jungle by a magnet company to differentiate and collect all the magnetic substances separately in a large bag. The player will be provided a magic magnet that can test the material and bring it back to the leading magnet company. The challenge is that the magic magnet can be used only 10 times to detect the magnetism of it and once utilised completely, the player has to identify whether the substance is magnetic and non-magnetic on its own. Collect as many magnetic substances as possible to achieve high score.
Before going deeper into learning about magnetic and non-magnetic substances and identify them, let’s first talk about the concepts of defining and understanding magnets and magnetism.
- Definition of magnet
The substance having the property of attracting iron and other materials (iron like) such as cobalt and nickel is called magnet.
Magnetism is the force exerted by magnets when they attract or repel each other. Magnetism is caused by the motion of electric charges. Each atom has electrons, particles that carry electric charges. Spinning like tops, the electrons circle the nucleus, or core, of an atom. Their movement generates an electric current and causes each electron to act like a microscopic magnet. In most substances, equal numbers of electrons spin in opposite directions, which cancels out their magnetism. That is why materials such as cloth or paper are said to be weakly magnetic. In substances such as iron, cobalt, and nickel, most of the electrons spin in the same direction. This makes the atoms in these substances strongly magnetic—but they are not yet magnets. The region around a magnet where its influence is felt is called its magnetic field. We cannot see a magnetic field but it can be represented by a set of curves around the magnet. The properties of magnetic field lines are:
- The lines start from the north pole and end at the south pole of the magnet
- They are crowded at poles where the magnetic field is the strongest
- The lines do not intersect each other
- Each line is a continuous closed curve passing through the magnet
To get magnetized, another strong magnetic substance must enter the magnetic field of an existing magnet. The magnetic field is the area around a magnet that has magnetic force.
- Poles of a magnet and interaction between poles of a magnet
A magnet has two ends called poles, one of which is called a north pole or north-seeking pole, while the other is called a south pole or south-seeking pole. The north pole of one magnet attracts the south pole of a second magnet, while the north pole of one magnet repels the other magnet’s north pole. So we have a common saying: like poles repel, opposite poles attract. The north pole of a magnet points roughly toward Earth’s north pole and vice-versa. That’s because earth contains magnetic materials and behaves like a gigantic magnet. If you cut a bar magnet in half, you get two brand new, smaller magnets, each with its own north and south pole.
- Making your own magnet
With the help of a permanent magnet you can change a piece of iron into a magnet. For this, you need to place the iron piece on a flat surface. Then rub the permanent magnet on the iron piece for many times. Your hand movement should always be in the same direction, while doing this. After some time, the iron piece would attain magnetic property.
- Storing a magnet
Bar magnets should be kept in pairs. Their unlike poles should be kept on the same side. A wooden piece must be placed between them. A piece of soft iron should be placed at their ends. For storing a horse-shoe magnet, you should place a piece of iron across the two poles. Magnets should be kept away from speakers, CD, television, music system, computer, etc.
- Types of magnet
There are basically two types of magnets:
- Natural Magnet: Magnet which is found naturally is called natural magnet.
- Artificial Magnet: Magnet which is made by humans is called an artificial magnet.
- Magnetic and Non Magnetic Substances
The materials which get attracted towards a magnet are magnetic – for example, iron, nickel or cobalt. The materials which are not attracted towards a magnet are non-magnetic materials. Examples of non-magnetic materials include rubber, coins, feather and leather.
- GAME DESIGNProblem statement
The student has to play the role of a magnet hunter where the player is assigned a task by a leading magnet company of collecting the magnetic materials by going on a hunt in a jungle to find, identify and collect the correct materials. Both magnetic and non-magnetic materials are spread in a jungle which need to be collected within a defined time frame. The time limit for the game is 2-3 minutes.
- Game design overview
In the game, the player is a magnet hunter. Imagine, you are a hunter who has been given a mission of finding as many magnetic materials as possible in the jungle like a treasure hunt and the materials collected has to be taken back to the magnet manufacturing company. You have a magic magnet to identify the magnetic power of the substance but you have only 10 chances to utilise the magic magnet after that you are on your own to identify the materials as magnetic or non-magnetic. Collect as many magnetic substances as possible to achieve the highest competitive score. If you select 5 non-magnetic items, your game gets over.
- How to design the game?
- Step I
As the game begins, the player is given instructions of the game in the form of short & quick story and once continued, the players starts the journey of entering into a jungle of finding materials that are magnetic in nature. There are 100 magnetic and non-magnetic materials spread across the jungle and it is visible on the map.
Hint: Use the magnet provided by the company and recollect the laws of attraction and repelling to identify magnetic and non-magnetic substances. 100 substances are distributed as magnetic and non-magnetic materials and spread across the jungle
- Step II
The player has to go to the location using the map and decide whether to collect that materials being a magnet or not collect being a non-magnet. The magic magnet can be used to identify the magnetism of the materials but it can only be used 10 times after which you have to select on your own. Each correct magnetic substance gives 10 points. 5 non-magnetic materials collected wrongly will lead to game getting over.
Hint: Cover the distance as fast as you can to collect more and more magnetic substances which will lead to earn more points to achieve the highest score. Magnetic or non-magnetic materials are randomly spread across the jungle.
- Step III
You will have 2-3 minutes of game time to collect as many magnetic materials possible. On completion of time limit, quantity of magnetic materials collected will earn you points and more the magnetic materials, more the high score. If you select 5 non-magnetic materials, the game gets over.
Hint: If all the magnetic materials are collected within the time limit, the game will get over. It will not wait for 3 minutes’ game time. Hence, it is very important to collect all the magnetic materials within the time limit keeping to achieve the highest score.
Learning Objective Based Evaluation (0-1)
Higher Order Thinking Skills
Learning Objective Based Evaluation Total Score
Higher Order Thinking Skills Total Score
Learning Objective Based Evaluation
1 point Questions:
Q1. Like poles of a magnet:
- attract each other
- repel each other
- are Neutral to each other
- convert non-magnetic into magnetic substance
Q2. What is a magnetic substance in the following objects given below?
Q3. Which of the following statements is true?
- a non-magnetic substance can be converted into a magnetic substance with the help of a permanent magnet
- there are no natural magnets, all of the magnets are man made
- magnetic lines intersect each other at various points
- cobalt is a magnetic substance
Q4. The properties of Magnetic lines are:
- The lines start from the north pole and end at the south pole of the magnet.
- They are crowded at poles where the magnetic field is the strongest.
- Each line is a continuous closed curve passing through the magnet.
- All of the above
Evaluation of HOTS (Higher Order Thinking Skills)
Identification of the Problem Statement:
Q5. What is the goal of the game that you have designed? (1 point)
Q6. Does the game designed solve the problem? Justify your answer. (1 point)
Solution of the Problem Statement:
Q7. Will you be able to convert iron into a magnet? (1 point)
Q8. What are the steps you will take to convert a magnetic substance into a magnet? (1 point)
Innovation in the Problem Statement:
Q9. What are the innovative aspects of the solution for which the game is designed? (2 points)
Creativity in the Game Design:
Q10. Describe and explain the unique design elements used in the game. (2 points)
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