The circumstances of the object may allow one to say that one object is older than another without being able to assign a particular age to the objects.Very often historical evidence is found in layers and older layers are further down that the top layers. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.
Dating is figuring out the age of things, or determining dates. Absolute dating is a method of estimating the age of an object in years .
There are two types of dating: absolute dating and relative dating.
Carbon dating is one example of radiometric dating.
Similarly, relative dating is done by paleontologists who find layers of fossils.
Coins found in excavations may have their production date written on them, or there may be written records describing the coin and when it was used, allowing the site to be associated with a particular calendar year.