Peter found a cool rock very deep below the surface of some dirt. He knew the rock was _____.
older younger
A B
Fossils found at the lowest layer of rock would be the oldest, as these would have been buried for the longest time, whereas fossils found closer to the surface would be buried more recently and therefore be younger.
Age
closer
younger
LESS
LESS
Rock
older
younger
dirt
age
age
age