1
.
Magnets
have
2
ends
called
____________________
2
.
When
the
____________________
are
lined
up
,
an
invisible
____________________
apperas
3
.
The
Earth's
____________________
field
protects
us
from
radiation
from
the
sun
4
.
A
centre
of
the
Eath
there
is
a
liquid
____________________
