Geologic Time Specht - Geologic time scale

Geologic time scale 1. The remains or traces of organisms that have been preserved in rock.

• Metamorphic

• Mass Extinction

• Evolution

• Fossils

States that a rock layer is older than the layers above it and younger than the layers below it.

• Law of Superposition

• Pangea

• Relative Dating

• Trace Fossils

Era that began about 66 million years ago, known as the "Age of Mammals"

• Law of Superposition

• Cenozoic Era

• Deposition

• Precambrian Time

Method of finding out the age of an object using radioactive isotopes such as Carbon 14

• Cyanobacteria (blue-green algae)

• Precambrian Time

• Radiometric Dating/Carbon Dating

• igneous

Which of these is the oldest fossils?

• Human

• Fish

• Dinosaurs

• Frogs (Amphibian)

The longest of the three time segments

• Eras

• Eons

• Periods

• Epochs

Which era, the middle life (245-144 million years ago), was the rise and extinction of dinosaurs?

• Pangea

• Mesozoic Era

• Cenozoic Era

• Paleozoic Era

The part of geologic time 570-245 million years ago; invertebrates, fishes, amphibians, reptiles, ferns, and cone-bearing trees were dominant

• Cenozoic Era

• Paleozoic Era

• Absolute dating

• Precambrian Time

Event during which many species become extinct during a relatively short period of time

• mass extinction

• Fault

• Unconformity

• Strata

makes up about 87% of earth's history; when the oceans, atmosphere, and continents were formed

• Precambrian Time

• K-T extinction

• Mesozoic Era

• Paleozoic Era