Magnets and magnetic fieldsIB MYP Sciences: Mind map

Exam questions on Magnets and magnetic fields

1. A student in Johannesburg tests four objects with a bar magnet: an iron nail, a copper coin, a steel paper clip and a plastic ruler.
   Explain why the iron nail is attracted to the magnet but the copper coin is not.2 marks
2. A compass contains a small magnetised needle that is free to turn. A hiker in Switzerland uses one to find north on a mountain path, and a science class uses one to investigate the field around a bar magnet.
   Describe how the class could use a compass to plot the magnetic field line around a bar magnet.2 marks
3. A technician at a recycling centre in Singapore separates mixed metal waste with a large magnet. Back in the school laboratory, a science class uses small bar magnets and iron nails to model the same effect.
   Explain how the magnet separates iron and steel scrap from aluminium, copper and plastic.3 marks