The
____________________
is
the
only
planet
in
the
Solar
System
that
contains
____________________
water
.
This
is
due
to
the
____________________
to
the
Sun
,
which
is
the
perfect
one
and
the
____________________
of
the
atmosphere
which
prevents
extreme
temperatures
.
In
the
early
ages
,
all
the
water
was
in
the
atmosphere
in
the
form
of
____________________
____________________
,
but
as
soon
as
the
planet
got
____________________
,
it
started
to
____________________
and
to
fall
as
____________________
.
As
a
consequence
,
the
first
____________________
were
formed
.
In
our
planet
,
almost
____________________
%
of
the
water
form
seas
and
oceans
,
whereas
only
the
____________________
%
is
continental
water
.
Among
this
continental
water
,
only
the
____________________
,
____________________
%
is
liquid
,
the
rest
is
gas
or
ice
.
The
main
difference
of
sea
water
and
continental
water
is
____________________
.
The
salinity
of
the
oceans
is
____________________
g
/
l
and
____________________
____________________
the
most
abundant
salt
.
The
oceans
play
a
very
important
role
because
it's
the
main
____________________
____________________
on
Eath
,
it's
the
____________________
for
a
great
number
of
living
beings
and
it
can
____________________
the
climate
.
