Union
$$A \cup B =$$
{ climax, earth, exposition, fall, fire, metal, resolution, rise, water, wood }
Symmetric Difference
$$A \ominus B =$$
{ climax, earth, exposition, fall, fire, metal, resolution, rise, water, wood }
Cartesian Product
$$A \times B =$$
{ (earth, climax),
(earth, exposition),
(earth, fall),
(earth, resolution),
(earth, rise),
(fire, climax),
(fire, exposition),
(fire, fall),
(fire, resolution),
(fire, rise),
(metal, climax),
(metal, exposition),
(metal, fall),
(metal, resolution),
(metal, rise),
(water, climax),
(water, exposition),
(water, fall),
(water, resolution),
(water, rise),
(wood, climax),
(wood, exposition),
(wood, fall),
(wood, resolution),
(wood, rise) }