Preserved evidence of an organism
Type of rock fossils are commonly found in
Determines age by comparing to other layers
Uses decay of isotopes to determine absolute age
Time it takes for half of a radioactive isotope to decay
Model that expresses major geological and biological events
Longest era; origin of Earth and first life forms
Era where many life forms appeared (Cambrian Explosion)
Age of dinosaurs; ends with a mass extinction
Current era; mammals become dominant
Idea that life arises from nonlife
Theory that living things come from other living things
Simulated early Earth conditions to test origin of life
Explains the origin of mitochondria and chloroplasts
Ancient prokaryotes that may resemble early life
Photosynthetic prokaryotes that added oxygen to Earth’s atmosphere
Theory that organic molecules came from early oceans
Includes trace, cast, mold, and preserved remains
Fossil used to define and identify geologic periods
Younger layers of rock are deposited on top of older ones
Endosymbiont Theory
Radiometric Dating
Relative Dating
Half-Life
Miller-Urey Experiment
Law of Superposition
Spontaneous Generation
Sedimentary Rock
Fossil Types
Index Fossil
Biogenesis
Fossil
Precambrian
Cyanobacteria
Mesozoic
Primordial Soup Hypothesis
Paleozoic
Geologic Time Scale
Cenozoic
Archaea