magnets

• What are we learning about in today's video?

  Magnets and magnetic fields
• What is a magnet?

  A material that produces a magnetic field
• What is the most common type of magnet?

  Bar magnet
• What do all magnets have in common?

  They have a north and a south pole
• How do we represent magnetic fields?

  Using field lines
• How do you draw field lines around a magnet?

  From the north pole to the south pole
• What is the first step in drawing field lines?

  Draw a straight line into the south pole
• Why is it important to check the direction of arrows on field lines?

  To ensure they point out of the north pole
• What does the density of field lines indicate?

  The strength of the magnetic field
• Where is the magnetic field strongest around a magnet?

  Near the north pole
• How can we find the poles of a magnet?

  Using a compass
• What does the needle of a compass represent?

  A tiny bar magnet
• What direction does a compass needle point?

  Towards the south pole of a magnet
• How do you recreate field lines using a compass?

  Join up the arrows from the compass needle
• What happens when you push the north poles of two magnets together?

  They repel each other
• Why do opposite poles of magnets attract each other?

  Field lines go from north to south
• What are the steps to represent magnetic fields with field lines?

  • Identify the north and south poles
  • Draw a straight line into the south pole
  • Draw a line coming out of the north pole
  • Add curved lines going into and out of the poles
  • Ensure arrows point from north to south
  • Check density of lines for field strength
• What are the interactions between two magnets?

  • Like poles repel each other
  • Opposite poles attract each other
  • Field lines illustrate these interactions