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Radiocarbon dating used in a sentence

These neutrons can become unstable, and when they do, they release energy and undergo decay. Radioactivity occurs when the nucleus contains an excess amount of neutrons.

Scientists use a technique called radiometric dating to estimate the ages of rocks, fossils, and the earth.

The results showed that Ötzi died over 5000 years ago, sometime between 33 BC. It is found in the air in carbon dioxide molecules.

The amount of carbon-14 in the air has stayed the same for thousands of years.

There is a small amount of radioactive carbon-14 in all living organisms because it enters the food chain.

Once an organism dies, it stops taking in carbon-14.

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  1. Radiometric dating is the term for a method to determine the age of an object based on the concentration of a particular radioactive isotope contained.

  2. A secondary school revision resource for OCR Gateway Additional GCSE Science about radiation and uses of radioisotopes.

  3. Nov 27, 2012. In the early years of radiocarbon dating a product's decay was measured, but this required huge samples e.g. half a human femur. Many labs now use an Accelerator Mass Spectrometer AMS, a machine that can detect and measure the presence of different isotopes, to count the individual 14C atoms in.

  4. Carbon-14 dating is a method, based on unprovable assumptions about the past, used to date things that contain carbon e.g. fossils. It can only give maximum ages of around 50,000 years and yet C-14 has been found in fossils and diamonds thought to be millions and billions of years old respectively.

  5. Feb 11, 2014. Radiocarbon dating of fossils taken from caves on islands along southeastern Alaska's coast suggest that at least a portion of the area was remaining ice-free. D can be ignored because of the use of past perfect.there is no -ed form of verb as ref to it. E can be ignored because of have i.e. present.

  6. Example sentences from Wikipedia that use the word varve. Higher carbon content causes greater deposition of iron sulfide, which appears as a black varve. —Baltic Ice Lake. On the other. He used local peat sequences combined with varve dating to produce a regional climatic chronology for Scandinavia. —Pollen.

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