5 Written questions
5 Multiple choice questions
- longest subdivision of geologic time scale that is based on the abundance of certain types of fossils and is subdivided into eras, periods, and epochs
- Middle era of Earth's history, during which Pangaea broke apart, dinosaurs appeared, and reptiles and gymnosperms were the dominant land life-forms
- organism with a three-lobed exoskeleton that was abundant in Paleozoic oceans and is considered to be an index fossil
- Third longest divison of geologic time-subdivided into epochs and is characterized by the types of life that existed worldwide
- The longest part of earths history, lasting from 4 billion to about 544 million years ago.
5 True/False questions
Eras → longest subdivision of geologic time scale that is based on the abundance of certain types of fossils and is subdivided into eras, periods, and epochs
Pangae → Second longest division of geologic time based on major worldwide changes in types of fossils
Organic evolution → Change of organisms over geologic time
Cyanobacteria → Chlorophyll-containing, photosynthetic bacteria thought to be one of Earth's earliest life-forms
Geologic time scales → This division of Earth's history into time units based on life forms that lived only during certain periods.