Bio Ch. 14

The earliest of the 3 geologic eras of the Phanerzoic Eon, a time of dramatic geological, climatic, and evolutionary change

• Era
• Mesozoic
• Paleozoic
• Cenozoic

A scientist that studies fossils

• Biologist
• Fossil
• Paleozoic
• Paleontologist

One of 3 geologic eras of the Phanerozoic Eon called the Age of Reptiles

• Cenozoic
• Mesozoic
• Paleozoic
• Fossil

A layer of iridium-rich material between rocks of the Cretaceous period and rocks of the Paleogene period that provide evidence of a meteorite impact

• Plate Techtonics

• Radiometric Dating

• K-T Boundary

• Geologic Time Scale

A model showing major geological and biological events in Earth's history

• Plate Tectonics
• Geologic Time Scale
• Relative Dating
• Radiometric Dating

A preserved remnant or impression of an organism that lived in the past

• Paleontologist
• Mesozoic
• Fossil
• Half-Life

The amount of time required for half of a radioactive isotope to decay

• Half-Life
• Radioactive Decay
• Paleozoic
• Cambrian Explosion

A rapid diversification of most major animal groups during the Paleozoic era

• Cambrian Explosion
• Fossil
• K-T Boundry
• Radiometric Dating

A method used to determine the age of rocks by comparing the rocks with younger and older rock layers

• Relative Dating
• Radiometric Dating
• Geologic Time Scale
• Cambrian Explosion

Subdivision of an era on the geologic time scale, can last tens of millions of yrs

• Eon
• Era
• Periods
• Epochs