The
Earth's
crust
is
the
thinnest
and
____________________
of
all
the
layers
that
make
up
our
planet
.
It
consists
of
____________________
and
its
exterior
forms
the
____________________
and
the
____________________
.
According
to
the
theory
of
tectonic
plates
,
the
Earth's
surface
is
formed
by
____________________
that
fit
together
like
a
____________________
puzzle
.
These
plates
move
slowly
due
to
the
force
of
____________________
and
the
Earth's
____________________
.
Rocks
on
the
surface
are
created
or
____________________
where
the
____________________
of
two
plates
meet
.