Question

name: _______________
geologic time scale mnemonic device practice
instructions: write the geologic periods listed below in the correct order three (3) times in that space provided from oldest to youngest (they are not listed below in the correct order).
silurian - devonian - quaternary - mississippian - triassic - cambrian - pennsylvanian - tertiary
ordovician - cretaceous - permian - jurassic

1. _______________
2. _______________
3. _______________

Explanation:

The geologic periods are ordered from oldest to youngest based on the established geologic time scale, starting with the earliest Paleozoic period and progressing through the Mesozoic to the most recent Cenozoic periods.

Answer:

1. Cambrian - Ordovician - Silurian - Devonian - Mississippian - Pennsylvanian - Permian - Triassic - Jurassic - Cretaceous - Tertiary - Quaternary
2. Cambrian - Ordovician - Silurian - Devonian - Mississippian - Pennsylvanian - Permian - Triassic - Jurassic - Cretaceous - Tertiary - Quaternary
3. Cambrian - Ordovician - Silurian - Devonian - Mississippian - Pennsylvanian - Permian - Triassic - Jurassic - Cretaceous - Tertiary - Quaternary