Magnetism
is
a
____________________
that
has
the
ability
to
push
or
pull
some
objects
such
as
metals
like
IRON
or
____________________
.
Magnets
have
two
ends
called
____________________
.
When
you
bring
two
magnets
together
,
like
poles
REPEL
each
other
and
opposite
poles
____________________
.
If
you
sprinkle
iron
filings
around
a
magnet
,
they
will
form
____________________
showing
the
direction
of
the
magnetic
force
.
These
lines
of
magnetic
force
are
called
a
magnetic
____________________
.
The
closer
the
lines
are
together
the
STRONGER
the
force
.
The
Earth
generates
a
magnetic
field
as
well
.
For
centuries
,
sailors
have
used
this
magnetic
field
to
help
them
find
____________________
on
cloudy
days
and
nights
using
a
tool
called
a
COMPASS
.
The
Earth's
magnetic
field
also
causes
one
of
the
wonders
of
nature
,
the
AURORA
____________________
,
which
is
produced
when
charged
particles
in
space
are
pulled
into
the
Earth's
atmosphere
by
the
Earth's
magnetic
field
.
