Paleozoic Era
This period is known for the "Cambrian Explosion," a rapid diversification of life.
What is the Cambrian Period?
This period is known as the "Age of Dinosaurs."
What is the Mesozoic Era?
This period is known as the "Age of Mammals."
What is the Cenozoic Era?
This type of fossil is formed when an organism is buried in sediment and its hard parts are replaced by minerals.
What is a Replacement Fossil?
This period saw the rise of the first land plants and the development of large forests.
What is the Devonian Period?
This period saw the breakup of Pangaea and the rise of flowering plants.
What is the Cretaceous Period?
This epoch saw the rise of the first hominids
What is the Pliocene Epoch?
This type of fossil is formed when an organism is buried in sediment and its soft parts are preserved.
What is a Trace Fossil?
This extinction event, the largest in Earth's history, wiped out 96% of marine species.
What is the Permian-Triassic Extinction?
This group of reptiles, known for their long necks, dominated the Jurassic period.
What are the Sauropods?
This epoch saw the development of large ice sheets and the extinction of many large mammals.
What is the Pleistocene Epoch?
This type of fossil is used to date rock layers because they were widespread and existed for a relatively short period of time.
What is an Index Fossil?
This period was the rise of the first amphibians and reptiles.
What is the Carboniferous Period?
This extinction event wiped out the dinosaurs and many other species, likely caused by an asteroid impact.
What is the Cretaceous-Paleogene Extinction?
This epoch is characterized by a warming climate and the rise of modern humans.
What is the Holocene Epoch?
This type of fossil is formed when an organism is trapped in amber or frozen in ice.
What is an Original Material Fossil?
This period is named after the many trilobites found in its rocks.
What is the Ordovician Period?
This period saw the rise of the first mammals.
What is the Triassic Period?
This period saw the diversity of mammals and the development of grasslands.
What is the Paleogene Period?
This type of fossil is formed when an organism is buried in sediment and its hard parts are compressed into a thin film.
What is a Carbonized Fossil?