The
world's
atmosphere
is
forever
on
the
move
.
Wind
is
air
in
motion
.
Sometimes
air
moves
slowly
,
giving
a
____________________
breeze
.
At
other
times
it
moves
rapidly
creating
gales
and
hurricanes
.
Gentle
or
fierce
,
wind
always
starts
in
the
same
way
.
As
the
sun
moves
through
the
sky
,
it
heats
up
some
parts
of
the
sea
and
land
more
than
others
.
The
air
above
these
____________________
spots
is
warmed
,
becomes
lighter
than
the
surrounding
air
,
and
begins
to
rise
.
Elsewhere
,
cool
air
sinks
,
because
it's
____________________
.
Winds
blow
because
-
air
squeezed
out
by
sinking
,
cold
air
is
sucked
in
under
rising
,
warm
air
.
Winds
will
blow
wherever
there
is
a
____________________
in
air
temperature
and
pressure
.
