Which is the Strongest Magnet?

       

We carried out an investigation to see which of four different types of magnet was strongest. Teacher asked us for ideas on how we could find out which was the strongest magnet. We had lots of different ideas. We decided to test the four magnets by seeing which would hold the most paper clips.

First, we made some predictions....

...then we started investigating. We had to make sure that the test was fair, because some of the magnets were bigger than others. We linked the paper clips together and only stuck them to each magnet at one point.

Here are our predictions and results:

We decided to make a bar chart of our results. It was really useful because it allowed us to see very clearly which magnet was the strongest.