____________________
is
the
study
of
the
____________________
things
that
the
Earth
is
made
of
.
Rocks
and
____________________
are
nonliving
things
in
the
Earth
.
People
who
study
geology
are
called
____________________
.
Rocks
are
clusters
of
minerals
and
other
inorganic
materials
.
There
are
three
main
types
of
rocks
:
____________________
rocks
,
sedimentary
rocks
and
metamorphic
rocks
.
