It is possible to tell the number of years ago a particular rock or archeological site had been formed.
Two broad categories of classification methods are relative dating and absolute dating.
The meteorites and moon rocks are believed to have formed virtually at the same time with earth and are therefore, considered to be of the same age as earth.
The meteorites and moon rocks are believed to have formed virtually at the same time with earth and are therefore, considered to be of the same age as earth.ctually happened.
Geologists often need to know the age of material that they find.
They use absolute dating methods, sometimes called numerical dating, to give rocks an actual date, or date range, in number of years.
Relative dating involves the dating of geological events and formations that occured/existed throughout the whole geological history, and this eventually gives the relative age of the earth.
While, Absolute dating involves the use of isotopes and radioctive elements (radioactivity) and also the study and relation of meteorites and moon rocks, which eventually gives the actual/absolute age of the earth.
As more and more layers are deposited, the older rock layers end up at the bottom and the newer ones toward the top. What is the difference between relative and absolute age?
For example, if an area used for trash has modern refuse in it such as CDs and computers, and the layer underneath has cans made of tin, then it is safe to say the layer of tin cans have a greater relative age than the layer with modern refuse.
However, this does not say anything about the absolute age of the layers.
Current scientific evidence shows that the Earth is: c) more than 4 billion years old 2.
Look at the diagram below representing layers of rocks and the fossils buried in them. (The bottom layer is circled)b) Explain how you know which layer is the oldest.
That is, scientists cannot tell exactly how old the layers are in years to the present date, only which is older than the other.