Why do we use relative dating?

Relative dating is used to arrange geological events, and the rocks they leave behind, in a sequence. Sedimentary rocks are normally laid down in order, one on top of another. In a sequence, the oldest is at the bottom, the youngest is at the top.

Why is radiometric dating more accurate than relative dating?

In relative dating, fossils are dated according to the depth at which they were buried. The fossils which are buried deep inside the earth are more ancient. The absolute dating is more precise than relative dating because it tells the exact age of the fossils.