anoxia - Answers a lack of oxygen
atmosphere - Answers layer of gases surrounding the lithosphere
biodiversity - Answers global sum of all ecosystems
biostratigraphy - Answers correlation of rocks using fossils
Cambrian - Answers oldest period of the Phanerozoic/Paleozoic
Cenozoic - Answers the most recent grouping of geological periods in the Phanerozoic
correlation - Answers matching geological sections that might be separated by large distances
Cretaceous - Answers youngest period of the Mesozoic
Cross-Cutting Relationships - Answers method of deduction of relative age of geological sections
Cuvier, George - Answers established concept of extinction
Deep Time - Answers understanding of extreme age of Earth
Devonian - Answers geological period in the Paleozoic
Earth System Science - Answers understanding Earth as an interaction of many systems (spheres)
ecosystem - Answers a collection of living organisms that interacts with the Earth system
extinct/extinction - Answers death of every member of a species
Faunal Succession - Answers change in fossil species over time
flood basalt - Answers basalt lava produced by large scale volcanic activity
foraminifera - Answers microfossils that commonly secrete a calcium carbonate shell
fossil range - Answers length of geological time a species existed on Earth
Ga - Answers Giga annum; billions of years ago
glaciation/glacial period - Answers cold climatic periods marked by the advance of glaciers
Gondwana - Answers southern part of Pangaea
greenhouse gas - Answers gases in the atmosphere that contribute to global warming
Hutton, James - Answers Scottish Geologist; used cross cutting relationships in Earth age studies