WE
LIVE
IN
THE
____________________
.
AIR
IS
MADE
UP
OF
____________________
,
NITROGEN
AND
SMALL
AMOUNTS
OF
OTHER
GASES
,
SUCH
AS
CARBON
DIOXIDE
.
IT
IS
WHERE
____________________
OCCURS
.
IT
RISES
TO
ABOUT
____________________
KM
ABOVE
THE
EARTH
SURFACE
.
THE
STRATOSPHERE
RISES
TO
ABOUT
____________________
KMS
ABOVE
SEA
LEVEL
.
IT
CONTAINS
____________________
____________________
.
OZONE
IS
A
GAS
WHICH
____________________
THE
HARMFUL
UV
-
B
RAYS
OF
THE
SUN
REACHING
US
.
THE
NEXT
LAYER
UP
IS
THE
____________________
.
IT´S
NEXT
TO
SPACE
AND
THERE
ARE
____________________
HERE
.
