The
____________________
is
the
nearest
layer
of
the
atmosphere
to
the
Earth
.
This
is
where
____________________
happens
.
The
____________________
protects
us
from
the
strong
____________________
of
the
Sun
The
____________________
protects
us
from
most
of
the
objects
that
fall
from
space
,
such
as
____________________
.
