Time Periods
The first time period.
What is the Precambrian?
The three long units of time.
What are eras?
Smallest Paleozoic era animal.
What is the Small shelly fauna?
The percent that Precambrian time covered in Earths history.
What is 88%?
The units of geological time.
What is a period?
The biggest Paleozoic era animal.
What is the Edestus?
The era of the dominance of dinosaurs.
What is the Mesozoic era?
The record of the geological events and the evolution of life forms as shown in the rock records.
What is the geological time scale?
The animal that went extinct in the Cenozoic era.
What is a Megalodon?
The era that mammals evolved to become the dominant land animals and the continents moved to their present day positions.
What is the Cenozoic era?
Provided evidence of change on earth.
What are Fossils?
The era that life increased in complexity and Pangdea formed.
What is the Paleozoic era?
The three periods in the Mesozoic era.
What are the Triassic, Jurassic, and Cretaceous periods?