## GeoKansas--Geotopics--Age of the Earth

so, we rely on radiometric dating to calculate their ages. any lesson page:Click "add to" located below the video player and follow the prompts to name your course and save your lesson. dating is used to estimate the age of rocks and other objects based on the fixed decay rate of radioactive isotopes. others measure the subatomic particles that are emitted as an isotope decays. different methods of radiometric dating can be used to estimate the age of a variety of natural and even man-made materials. additional methods of radiometric dating, such as potassium-argon dating and rubidium-strontium dating, exist based on the decay of those isotopes. because plants use carbon dioxide for photosynthesis, this isotope ends up inside the plant, and because animals eat plants, they get some as well. well, a simple explanation is that it is the time required for a quantity to fall to half of its starting value.

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## Radiometric Dating: Methods, Uses & the Significance of Half-Life

radiometric dating is a method used to date rocks and other objects based on the known decay rate of radioactive isotopes. that uranium-lead dating is one of the most reliable radiometric dating methods. these break down over time in a process scientists call radioactive decay. with radiocarbon dating, the amount of the radioactive isotope carbon-14 is measured. radiocarbon datingso, we see there are a number of different methods for dating rocks and other non-living things, but what if our sample is organic in nature? learning outcomesas a result of watching this video, you might be able to:Compare radiometric dating, radioactive decay and half-life. measuring isotopes is particularly useful for dating igneous and some metamorphic rock, but not sedimentary rock. compared to some of the other radioactive isotopes we have discussed, carbon-14's half-life of 5,730 years is considerably shorter, as it decays into nitrogen-14.

## Radiometric Dating

career path that can help you find the school that's right for you. this is different to relative dating, which only puts geological events in time order. these rates of decay are known, so if you can measure the proportion of parent and daughter isotopes in rocks now, you can calculate when the rocks were formed. however, there are radiometric dating methods that can be used on sedimentary rock, including luminescence dating. the unbiased info you need to find the right school. yes no teacher or other school staff student teacher early years teacher primary teacher – years 1 - 8 secondary teacher – years 9 - 13 head of science/leader of science principal school student school student – years 1 - 8 school student – years 9 - 13 someone else teacher educator or pld provider scientist or someone working in science a parent or caregiver other: topics and concepts articles and activities geologists often need to know the age of material that they find. they release radiation until they eventually become stable isotopes of lead. the two uranium isotopes decay at different rates, and this helps make uranium-lead dating one of the most reliable methods because it provides a built-in cross-check.