Higher:
Is able to compare the use and properties of different magnets
Middle:
Can describe what different magnets can be used for
Lower:
Is able to name some different types of magnet
Lesson Recap Starter: Think back to the last lesson. Write down some examples of how magnets are used.
Lesson Starter: Look at the starter slide - This picture shows a telescopic tool with a magnet head to grab isolated screws. Why would a magnet on the head of the tool be useful?
Children to write down answers on sticky notes, mini whiteboard or discuss and feedback.
Presentation - Starter Slide.
Answer questions and take part in activities during the presentation. Stop the presentation at the relevant slides: Talk Partners; AfLs; Songs. Take part in the Choral Response Questions activity (see Assessment section) after the Keywords/Rocket Words slide.
Key Concept:
During this unit, each lesson contains a key concept question housed in the '30 Second Challenge' slide. To help children master this content so the knowledge moves from their short term memory to their long term memory, at the beginning of the follow on lesson the question from the previous lesson is revisited.
The questions covered during this unit include:
1. What metal is found in a magnet?
2. List the different types of magnets?
3. Explain how a magnet works.
4. Why does a magnet always point north?
5. How does a push and pull force work?
6. What is a force?
Presentation
Career Film: This is Christian Richardson who works for Network Rail as an Signalling Designer for Volkervessels UK.
Expert Film: Joe Howard from Ben Burgess describes two different magnets he uses in his job.
How we deliver the Gatsby Benchmarks:
2 - Learning from career and labour market information: Pop along to Developing Experts career’s zone to find out about jobs in your area.
4 - Linking curriculum learning to careers: This unit showcases careers in the rail industry. Access our 360° virtual work tours.
7 - Encounters with Further and Higher Education: Pop along to Developing Experts career’s zone to find out about training providers in your area.
Presentation - Expert Film
Comparing Magnets
Watch the mission assignment film for more help with the activity.
Take your selection of magnets to compare their uses and properties.
Children are to compare:
1. The shape of the magnet
2. The point of attraction
3. The North / South Pole
4. Potential uses
Give children the handout to begin recording notes.
Comparing Magnets
A selection of different types of magnets, so that the children can compare at least two different types i.e. bar magnet, horseshoe magnet, ring magnet, disc magnet, sphere magnet.
It may be helpful for the magnets to have the N & S marked on them, although the children can determine these using a magnet with known poles.
Paperclips
Handout
Children are to use the Handout to complete their comparison. They will need a paperclip to show where the points of magnetism are
Quiz
With their talk partners, the children are to go through the quiz at the end of the presentation and answer the questions.
Quiz in presentation
Handout
What happens when you push two north poles together?
What happens when you push a north and south pole together?
What is a magnetic field?
What uses can you think of for (different types of magnet)?
Quizzes available in pupil zone.
Unit knowledge organiser and quiz available in documents
The end of a magnet is called a...(pole)
A magnetic pole is...
North and south ends of a magnet will... (attract)
North and north ends of a magnet will ... (repel)
The Science Behind the Science
A magnet is an object that produces a magnetic field. They have a north pole and a south pole. Have you ever heard of the saying ‘opposites attract’? Well, the opposite poles of a magnet attract each other. Different poles attract. These magnets will pull towards each other. The same poles (i.e. two north poles) will repel one another if they are pointing towards each other. They will push away as far as possible.
There are three main types of magnets: permanent magnets, temporary magnets and electromagnets. For permanent magnets, once they are magnetised they do not easily lose their magnetism. An example is alnico (aluminium nickel cobalt alloy). Permanent magnets are usually found on fridge doors. They are usually made from ferromagnetic materials such as iron, nickel and cobalt.
Temporary magnets lose their magnetism once the magnetic field is removed. They become magnetised when they come into proximity of a magnet. An example would be a paperclip or other soft iron devices.
Electromagnets are used when a very strong magnet is needed. These types of magnets are made by placing a metal core (usually iron) inside a coil of wire that is carrying an electrical current. The electricity that is going through the sire produces a magnetic field. The core acts as a strong magnet. Did you know that computers and TVs use electromagnets?
Mission Assignment: A magnet will attract when two opposite poles are brought into proximity of one another. They will repel when they have similar poles (i.e. two north poles or two south poles).
Observe how magnets attract or repel each otters and attract some materials and not others.
Forces, electricity and waves - Forces - I have collaborated in investigations to compare magnetic, electrostatic and gravitational forces and have explored their practical applications. SCN 2-08a
Forces and Energy: the study of energy, its origin, storage and transfer and the work it can do; the study of forces; the application of scientific understanding through inventions and machines.
Comparative and fair tests.
Recording findings using simple scientific language, drawings, labelled diagrams, keys, bar charts, and tables
Grade 3 - Force, Work and Energy. Learn about magnets.
List the magnets of different shapes commonly used in life