SUBJECT: BASIC SCIENCE AND TECHNOLOGY – MAGNETISM
TERM: THIRD TERM
WEEK: WEEK 7
THEME: YOU AND TECHNOLOGY
CLASS: PRIMARY 6
TIME: 40 MINUTES
- Meaning of Magnet
- Properties of magnet
- Uses of magnet
- Making magnets
At the end of this Topic, Student should be able to:
- Meaning of magnets.
- Group materials in magnetic and non-magnetic material.
- State common applications of magnetism.
- Make and use magnet.
TEACHING AND LEARNING MATERIALS
- Explanatory posters/pictures
- Explanatory videos
TEACHING AND LEARNING METHODS
- Questions and answer
- NERDC Basic Education Curriculum for primary schools.
- Universal Basic Education Curriculum for primary schools.
- Lagos State Scheme of Work.
- Online Materials.
- Basic Science and Technology for Primary Schools.
A magnet is a piece of iron that attracts metal.
Properties of Magnet
- It attract magnetic materials like irons.
- It attract unlike poles material and repel like poles
- The great attracting region of a magnet is in their North and south poles
- Magnet can lose it magnetism under unfavorable conditions like heating, hammering strongly.
- Permanent magnet can turn magnetic materials into temporary magnet.
- A bar magnet that have been suspended to swing freely in a horizontal plane, always comes to rest with it poles pointing roughly North –South.
Force is a force that stops things from moving easily. It is friction that enables a nail to stay in a hole and hold two piece of wood together. It is friction that makes it possible for fire to occur by striking the two surfaces of two stones.
CLASSES OF MAGNET
- Temporary magnet: they are magnet that easily lose their magnetism. They are made of soft iron like pure iron.
- Permanent magnet: they can retain their magnetism for a long time. They are made of steel.
MAGNETIC MATERIALS AND NON MAGNETIC MATERIAL
MAGNETIC MATERIALS are materials that can be attracted by a magnet. E.g. iron, steel nickel cobalt.
NON MAGNETIC MATERIAL are materials that cannot attract a magnet. Examples are brass, silver, plastic, rubber, wood, paper.
Uses of magnet
- Used to separate magnetic and non-magnetic materials
- Use to make compass
- Used in electronic for sound
- Use to lift heavy metallic objects
- Used in the production of electric current.
EFFECT OF FRICTIONAL FORCE
The effect of frictional force is that it make writing easier on paper.
It make pushing or pulling difficult
ADVANTAGES OF FRICTION
- It makes it possible for vehicle to stop when break is applied
- It prevents car wheels from slipping on a tarred road
- It make a nails to hold pieces of wood together
- It prevent us from slipping when walking
- It prevent the bicycle wheel from slipping on a muddy road
DISADVANTAGES OF FRICTION
- It causes ware and tears in shoe soles, car tyres, car engines
- It make pushing difficult.
- It makes pulling difficult.
- It produces heat in car engines.
REDUCTION OF FRICTION
- Make use of sand paper on the surface of wood.
- The use of ball bearing and rollers.
- Make use of lubricants such as grease and oil.
- The Teacher revises the previous lesson.
- The Teacher introduces the topic.
- The Teacher explains the lessons.
- What is a Magnet?
- List three Properties of magnet
- Mention three Uses of magnet
CONCLUSION: the teacher summarize the lesson.