Magnets

• What are the two poles of a magnet called?

  North and south
• What do all magnets produce?

  A magnetic field
• What materials experience a force in a magnetic field?

  Iron, steel, nickel, and cobalt
• How can you show a magnetic field visually?

  By drawing magnetic field lines
• What do the magnetic field lines indicate about the force on a north pole?

  They show the direction of the force
• What does it mean if magnetic field lines are closer together?

  The magnetic field is stronger
• Where is the magnetic field strongest in a magnet?

  At the poles of the magnet
• What type of force is always present between a magnet and a magnetic material?

  Attractive force
• What happens when two like poles of magnets are near each other?

  They repel each other
• What happens when two unlike poles of magnets are near each other?

  They attract each other
• What is inside a compass?

  A tiny bar magnet
• Why does the compass needle point north?

  Because the Earth generates its own magnetic field
• What does tracing a compass needle around a magnet show?

  The shape of the magnetic field
• What do iron filings show when used with a magnet?

  A pattern of the magnetic field
• How do compasses differ from iron filings in showing magnetic fields?

  Compasses show direction, filings show pattern
• What direction do magnetic field lines go?

  From north to south
• What does the magnetic field of a bar magnet look like?

  It goes from north to south
• What happens to the magnetic field lines when the magnet is rotated?

  They remain oriented from north to south
• How can you visualize the magnetic field of a bar magnet?

  Using compasses or iron filings