| A | B |
|---|
| Quaternary Man | a recognizable human |
| Ossuary | a container or room in which the bones of dead people are placed |
| Tertiary Period | began about 66 million years ago with the Cretaceous–Paleogene extinction event, which wiped out about 75% of all species on Earth. It ended when the ice ages of the Quarternary Period began (about 2.6 million years ago) |
| Quaternary Period | a geological period that began 2.58 million years ago and is still ongoing. It is the final period of the Cenozoic Era |
| Primitive (Prehistoric) Period | when human life existed before records documented human activity—roughly dating from 2.5 million years ago to 1,200 B.C. It is categorized into three archaeological periods: the Stone Age, Bronze Age, and Iron Age |
| Mettle | a person’s ability to cope well with difficulties or to face a demanding situation in a spirited and resilient way |
| Stasis | a period or state of inactivity or equilibrium |
| Herbaceous | relating to or having characteristics of an herb; having little or no woody tissue |
| Pensive | engaged in, involving, or reflecting deep or serious thought |
| Quagmire | a soft, boggy area of land that gives way underfoot |
