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Fossils and Geologic Time Scale

Teacher: Mrs. Moses
Across
The fossil of footprints made by prehistoric animals
A record of the geologic events and fossils of prehistoric life in Earth's history (2 words)
The Geologic Time Scale helps scientists understand what Earth's _____ looked like and the organisms that existed.
A timeline scale of Earth's history based on the types of life-forms (3 words)
Age of mammals when humans first lived on Earth
Remains, imprints, or traces of once living organisms from long ago
A scientist who studies fossils
An organism that lived in the ocean during the Paleozoic Era and is an index fossil
Down
In undisturbed rock layers, the oldest fossils are found at the bottom layer of sedimentary rock and the youngest fossils are found at the top layer of sedimentary rock.
Dinosaurs lived during this era
The type of rock where most fossils are found in (2 words)
A supercontinent that formed at the end of the Paleozoic Era
Comparing one layer of sedimentary rock or fossil with the location of another rock or fossil (2 words)
Remains of organisms that lived for a short time in a large geographic area (2 words)
A fossil that forms a 3-D copy of an organism when sediments fill in the mold and harden