Vocabulary - Unit 4 Lessons 3 and 4

method of measuring the age of an event or object in units of time

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

Tags

NGSS.HS-PS1-8

time required for half of a sample of a radioactive isotope to break down by radioactive decay to form a daughter isotope

Tags

NGSS.HS-PS1-8

the best rock type for radiometric dating

method for determining age by comparing the amount of carbon-14 to the amount of carbon-12 in a sample

distinctive fossils used to establish and compare the relative ages of rock layers and the fossils they contain

determining the absolute age of an object by comparing the relative percentages of a radioactive parent isotope and a stable daughter isotope

Tags

NGSS.HS-PS1-8

divides Earth's history into intervals of time defined by major events or changes on Earth

Tags

NGSS.MS-ESS1-4

the idea that changes in the earth's crust during geological history have resulted mostly from sudden violent and unusual events

largest divisions of geologic time, like the units of a textbook

Tags

NGSS.MS-ESS1-4