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Absolute Dating
8th Earth Science
Question | Answer |
---|---|
Determining the actual age of an event or object in year is called ? | absolute dating |
One of two or more atoms that have the same number of protons (atomic number) but different numbers of neutrons (atomic mass). | isotope |
The process in which a radioactive isotope tends to break down into a stable isotope of the same element or another element. | radioactive decay |
A method of determining the absolute age of an object by comparing the relative percentages of a radioactive parent isotope and stable daughter isotope. | radiometric dating |
A substance that cannot be separated or broken down into simpler substances by chemical means. | element |
The time required for half of a sample of a radioactive isotope to break down by radioactive decay to form a daughter isotope. | half-life |
Type of radiometric dating that finds the ages of wood, bones, shells, and other organic remains. | radiocarbon dating |
Type of radiometric dating used to date igneous volcanic rocks. | potassium-argon dating |
Type of radiometric dating used to find the earliest accurate age of Earth. | uranium-lead dating |
Small, rocky bodies of rock that have traveled through space and fallen to Earth's surface. | meteorites |
Fossils that are used to estimate the absolute age of rock layers in which they are found. | index fossils |