Science quiz on Geologic Time Vocab

the second largest unit of geologic time, lasting tens to hundreds of millions of years and consisting of two or more periods

• eon

• epoch

• era

• period

Tags

NGSS.MS-ESS1-4

the third longest time unit in the geologic time scale, measured in 10s of millions of years

• period

• era

• epoch

• dynasty

Tags

NGSS.MS-ESS1-4

the time unit in geologic time scale, measured in hundreds of thousands to millions of years

• era

• epoch

• period

• decade

Tags

NGSS.MS-ESS1-4

occurs when an unusually large number of organisms disappear from the rock record at about

the same time

• superposition

• uniformitarianism

• relative age dating

• mass extinction

Tags

NGSS.HS-LS4-5

the theory that geologic processes occurring today have been occurring since Earth formed

• mass extinction

• uniformitarianism

• original horizontality

• superposition

establishing age in order of past geologic events

• relative age dating

• absolute age dating

• original horizontality

• radioactive decay

Tags

NGSS.MS-ESS1-4

the principle stating that sedimentary rocks are deposited in horizontal

or nearly horizontal layers

• radiocarbon dating

• mineral replacement

• correlation

• original horizontality

the principle that states in undisturbed rock layers, the oldest rocks are on the bottom and each consecutive layer is younger than the layer beneath it

• Dendrochronology

• radioactive decay

• superposition

• key bed

Tags

NGSS.MS-ESS1-4

the principle that an intrusion or fault is younger than the rock it cuts across

• cross-cutting relationships

• unconformity

• principal of inclusion

• varve

the principle that the fragments, called inclusions in a rock layer must be older than the rock layer that contains them

• correlation

• absolute age dating

• principal of inclusion

• original preservation