Word Unit: Gemstones or Precious and Semi-Precious Stones + (the four gemstones which are most valuable are diamonds, sapphires, rubies, and emeralds; and anyone would be impressed with a gift of a diamond, a sapphire, an emerald, or a ruby piece of jewelry)

Word Unit: Geography Terms + (geography includes mapmakers, scientists, explorers of the earth and provides a way to look at both the physical world and the people who live in various parts this globe)

Word Unit: Geology or Related Geological Terms + (a glossary, or dictionary, of terms used in geology; the science of the earth including its origin, composition, structure, and history)

Word Unit: Graveyard words for a greater understanding of epitaphs (when visiting old graveyards and examining the epitaphs on gravestones, there are certain words and phrases which could be difficult or impossible to understand without knowing what the words in this unit mean)