Question

Fossil A is found in a rock layer above a layer containing Fossil B. Which fossil is probably older? A) Fossil A B) Fossil B C) both are the same D) can't be determined

Answer 1

Fossil B is older the lower they found the fossil the older it is

Answer 2

  Rock layers build up over time from being sedimented. The further down the layers are, the older the layers are. Fossil A is found above the Fossil B rock layer. Since Fossil B is in the layer below Fossil A, it is older. Therefore the answer is B, fossil B is probably older.