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Unit 11: Magnetism Page 9

Objectives

Lesson 1: Magnets

What IS magnetism, anyway? You abundance of electrons
can feel how two north sides of a spinning in the same
magnet push against each other, direction, and if those atoms
but what IS that invisible force, are lined up in the same

and why is it there? And how direction, that object will
come magnets stick to the fridge have a magnetic force.
and not a soda can? We'll about to
· There’s still a lot about fields
dive seep into the mysterious world
that is unknown. Fields are
of magnetism. Although scientists
an exciting area of physics
are still trying to puzzle out some
where a lot is still left to be
of its secrets, I'm going to get you
discovered.
up to speed on what they do know
· A field is an area around a
today. Are you ready?
electrical, magnetic or
You can get started by watching gravitational source that will
this video, and afterward either create a force on another
read more about it or start your electrical, magnetic or

experiments! gravitational source that
comes within the reach of the
Highlights: field.

· Magnetic fields are created · In fields, the closer

by electrons moving in the something gets to the source
same direction. of the field, the stronger the
force of the field gets. This is
· Electrons can have a “left” or
called the inverse square
“right” spin.
law.
· If an atom has more
· A magnetic field must come
electrons spinning in one
from a north pole of a
direction than in the other,
magnet and go to a south
that atom has a magnetic
pole of a magnet (or atoms
field.
that have turned to the
· If an object is filled with magnetic field.)
atoms that have an

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