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This method is a bit vague, which is why modern scientists have developed many methods by which to determine the absolute age of Earth materials.The absolute age of an Earth material is a measure of how old it actually is in years.Find out more about sending content to Google Drive.Imagine braving the desert heat for days or even weeks as you dig for dinosaur bones.Some scientists prefer to call it calendar age, because the term suggests that the age can be plotted on a calendar.

Dendrochronology: This is just a fancy term for counting tree rings!Some types are useful in certain situations and for certain materials, while others are perfect for other jobs.For example, while one type of absolute age dating may be perfect to figure out how old a dinosaur bone fossil is, another method of dating might be perfect to figure out the age of a rock sample.Instead of saying a material is older or younger than something else, scientists can simply report the age in years.Imagine it this way: If you have any siblings, using relative age dating would be like saying, 'I am older than my brother but younger than my sister,' but using absolute age dating would be like saying, 'I am 23 years old.' Since scientists work with many different types of Earth materials (rock, fossils, etc.), there are many types of absolute age dating.

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