Download Warm Up #7 What are two ways that magnets interact with each

Warm Up #7
▪ What are two ways that magnets interact with each other?
Lesson 3:
Magnetism
Essential Questions
▪ What causes a magnetic force?
▪ How are magnets and magnetic domains related?
▪ How are electric currents and magnetic fields related?
What is magnetic? ACTIVITY
▪ For thousands of years, people have recognized that some rocks attract others. The
word magnet comes from the area of ancient Greece called Magnesia where
magnetic rocks could be found. Now it is your turn! With what types of objects do
magnets interact?
▪ Take a magnet and try to pick up as many paper clips as the magnet can. Try both
ends.
▪ Cover the magnet with a penny, a nickel, and a craft stick and test how many paper
clips can be picked up with each item.
What is a magnet?
▪ Magnet – an object that attracts iron and other materials that have magnetic
qualities similar to iron
▪ Magnetic material – any material that a magnet attracts (iron, aluminum, nickel)
▪ BrainPop - Magnetism
Magnetic Fields and Magnetic Forces
▪ Magnetic force – a push or pull that a magnetic field applies to either a magnetic
material or an electric current
▪ Stronger when closer together, weaker when further away
Magnets
▪ Nonmagnetic materials can’t be made into magnets by having atoms point
in different directions
▪ Magnetic materials have atoms point in the same direction or the groups
point in different directions
▪ Temporary magnets attract other magnetic materials only as long as it is
within the magnetic field of another magnet
▪ Permanent magnets will remain magnetic even when the object is
removed from the magnetic field