A
river
is
____________________
____________________
that
flows
over
the
ground
.
Rivers
begin
in
____________________
areas
,
such
as
____________________
,
where
rain
,
water
or
snow
get
collected
.
This
place
is
called
the
____________________
.
A
river
is
formed
when
many
____________________
merge
together
.
During
their
journey
,
rivers
grow
beacause
they
collect
water
from
other
____________________
.
Rivers
end
in
____________________
areas
,
generally
big
bodies
of
water
,
such
as
seas
,
lakes
,
oceans
or
another
river
.
This
place
is
called
the
____________________
.
