Geologic Periods (Grade 9)
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Number the periods of the Phanerozoic era from oldest (1) to most recent (12).
The "Cambrian explosion" refers to
- a period of mass extinction
- a long period of violent volcanic activity
- the period of rapid appearance of a large variety of animals
- the time during which the supercontinent Pangaea broke apart
The Carboniferous Period is noted for its large-scale formation of which of the following?
- coal beds
Which of the following periods is included in "the age of mammals"?
Which two geologic periods are collectively referred to as "the age of fishes"?
- Paleogene and Neogene
- Cambrian and Ordovician
- Triassic and Jurassic
- Silurian and Devonian
Which geologic period is included in the "age of reptiles"?