When
the
United
States
formed
,
there
was
____________________
land
for
all
.
But
,
growing
food
took
some
of
the
land
.
Raising
____________________
,
like
cows
,
took
more
land
.
People
needed
trees
to
____________________
and
heat
their
homes
.
As
____________________
people
came
,
they
had
to
find
more
land
,
so
they
went
West
.
This
great
western
____________________
was
in
the
1800s
.
