NGSS

The paleontologist has found small pieces of dinosaur fossil in a rock layer. She and her crew set

up camp to further investigate this rock layer. They want more evidence to determine the age of

the dinosaur fossils in comparison to other fossils that have been found. The science team has a

big breakthrough when they find large teeth and a skull of the same type of dinosaur in the same

rock layer.

Choose the word(s) that best completes this sentence:

If fossils are moved by processes such as weathering and erosion, scientists might think they are the wrong age if they are mixed in with fossils from ________________.