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The age of the ancient organic materials can be found by measuring the amount of Carbon-14 that is left.

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We choose a source with a long half-life so that it does not need to be replaced often.Radiocarbon dating works by comparing different isotopes of carbon.Isotopes have the same number of protons but different numbers of neutrons in their nucleus.Some things you'll be assessed on include which radioisotope of carbon is used in carbon dating, the length of the half-life of carbon-14, and what you can determine about isotopes based upon half-life.The carbon cycle describes how carbon passes from the air, to plants, to animals, and back to the air again.

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One of my biggest takeaways while exploring Western Europe for six months was a conversation I had with an Austrian couple. What struck me the most was that there isn't a word in many languages for what North Americans call "dating", and that, in fact, few cultures around the world actually "date". And how to other people get to know one another before committing, having casual sex, or something else?