An example of this type of aging includes rocks in Canada that scientists identified as being hundreds of million years old.
Absolute age is more straight-forward and does not require any other objects for comparison.
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.
It can be determined by looking at the position of rock layers.
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.
You may not associate geology with time, but the former greatly depends on the latter.
In this lesson we'll discuss both absolute and relative time, and how they work together to give us a detailed history of Earth.