Geological Time Vocab

A principle that geologic processes that occurred in the past can be explained by current geologic processes...

• absolute dating

• uniformitarianism

• law of superposition

• geological column

the process of measuring the absolute age of geologic material by measuring the concentrations of radioactive isotopes and their decay products

• fossil

• radioactive decay

• geological column

• radiometric dating

Tags

NGSS.HS-PS1-8

a fossilized structure that formed in sedimentary rock by animal activity on or in soft sediment

• trace fossil

• absolute dating

• fossil

• unconformity

the time required for one half of the atoms of a radioisotope to emit radiation an decay products and form daughter isotopes

• absolute dating

• uniformitarianism

• half life

• relative dating

Tags

NGSS.HS-PS1-8

the preserved remains or traces of an organism that lived in the past

• fossil

• trace fossil

• unconformity

• law of superposition

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

the process in which a radioactive isotope tends to break down into a stable isotope of the same element or another element

• relative dating

• half life

• radioactive decay

• uniformitarianism

Tags

NGSS.HS-PS1-8

any method of determining whether an event or object is older or younger than other events or objects

• geological column

• half life

• absolute dating

• relative dating

any method of measuring the age of an event or object in years

• geological column

• absolute dating

• half life

• relative dating

a principle that states that younger rocks lie above older rocks if the layers have not been disturbed

• uniformitarianism

• radiometric dating

• law of superposition

• fossil

an arrangement of rock layers in which the oldest rocks are at the bottom

• geological column

• unconformity

• fossil

• trace fossil

Tags

NGSS.MS-ESS1-4