6.5 and 6.3

6.5 understand that magnetism is induced in some materials when they are placed in a magnetic field

6.3 recall the properties of magnetically hard and soft materials

Practical

1.      Stroke a magnet along a steel bar and an iron bar

2.      Try picking up some bar clips

3.      Bang both bars on the desk

4.      Now try picking up the paperclips again

5.      Repeat the experiment but this time put the bars inside an electromagnet instead of stroking them

 

 

Explanation

·         Steel is a magnetically hard material.  It retains its magnetism when magnetised (drop it and it doesn’t lose its magnetism)

·         Iron is a magnetically soft material.  It can be magnetised, but easily loses its magnetism (drop it it does lose it’s magnetisim)