Forces and Magnets – Magnet strength and materials
This week’s lesson is all about testing which objects a magnet can attract through and how strong magnets are.
For this lesson you will need one magnet, numerous steel paperclips and a range of materials such as paper, cardboard, yoghurt pot, plastic lid, table, shelf, towel, window glass, thin reading book etc. Make sure the materials you choose are not too thick. For the investigation, choose five different materials (similar to those listed above), one magnet and one steel paperclip.
- I have discussed materials and their properties.
- I have made a prediction based on prior learning.
- I have used my knowledge of magnets to support my investigation.
- I have chosen appropriate resources for my investigation.
- I have applied my knowledge and understanding to investigate magnets and reach a conclusion.
Use the ‘Investigating which materials magnets attract through’ activity sheet to make predictions, record your results and draw conclusions from your experiment.
Why not have a go at some of these extra activities to investigate the strength of magnets.
If you have another magnet at home that is different to the one you have used to conduct your investigation with, you can use both magnets to compare which one is stronger.
For these activities, you will need at least one magnet, several steel paperclips and several pieces of paper.
Attach a steel paperclip to the end of your magnet. How many more paperclips can be attached to form a chain? If you are using two magnets, your task is to investigate which one can hold the most paperclips? Before you start, make a prediction for how many paperclips your magnet will be able to hold or which magnet will be the strongest. Was your prediction right?
Attract Through Paper
Place a magnet below a sheet of paper and a paperclip on top. How many sheets of paper can each of the magnets attract through? If you are using two magnets, your task is to investigate which magnet can attract through the most pieces of paper. Before you start, make a prediction for how many pieces of paper your magnet will be able to attract through, or which magnet will attract through the most pieces of paper. Was your prediction right?