Question

which is correct about fossils location and age? (1 point)
○ fossils found in lower rock layers are older than fossils found in upper layers.
○ fossils found in rock layers that have been disturbed are the oldest.
○ fossils found in among numerous other fossils are most recent in age.
○ fossils found in rock layers closest to earth’s surface are the oldest.

Explanation:

• For the first option: In undisturbed rock layers, sedimentary rocks are formed by deposition over time, with older layers at the bottom and younger at the top. So fossils in lower layers are older than those in upper layers.
• For the second option: Disturbed rock layers (e.g., due to tectonic activity) can disrupt the original order, so fossils in disturbed layers can't be assumed to be the oldest.
• For the third option: The number of other fossils around doesn't determine the age of a fossil; age is related to the rock layer's formation time.
• For the fourth option: Rock layers closest to the surface are younger (as new layers are deposited on top), so fossils there are younger, not oldest.

Answer:

A. Fossils found in lower rock layers are older than fossils found in upper layers.