Fossils are preserved remains of once lived organisms, rock layers are sediments and geological time is the time scale in which each fossil lived.
- Fossils can be defined as preserved remains or traces of remains, of once lived organisms (e.g., plants and animals).
- Rock layers are different sediments in the Earth's crust where fossils can be found.
- Geological time refers to the time scale in which each fossil (or fossil group) lived.
In conclusion, fossils are preserved remains of once lived organisms, rock layers are sediments and geological time is the time scale in which each fossil lived.
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