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The elements embedded in the Earth's crust decay over time because they are very unstable.

When these elements decay and turn into other elements, scientists measure the difference between the original element and its decayed form.

After all, the scientists haven’t been around that long, have they?

There are a variety of different ways to figure out how old an object is.

Continue Reading During the formation of the Earth, radioactive elements became embedded in the minerals that make up the Earth's crust.

Since many of the minerals seen on a daily basis contain elements that decay over time, scientists can determine the ages of certain types of rocks.

Have you ever wondered how the scientists knew the age of the bone?Researchers can find out how long ago something died using radiocarbon dating.Bones and teeth from animals and humans, as well as artefacts made out of wood, fabric or paper are just some of the objects that can be aged using this process.Half-life refers to time it takes for half of the element to decay.This method of dating elements in minerals is commonly used in fields such as geology, archeology and anthropology.

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