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Geologic Time: Subdivisions
Test Description: Practice on Eras and other subdivisions
Instructions: Answer all questions to get your test result.
1) More than 7/8th or 87% of the history of the Earth makes up this division of time
A
Holocene Epoch
B
PreCambrian
C
Mesozoic Era
D
Paleozoic Era
2) The largest subdivision of geologic time is the
A
Period
B
Epoch
C
Era
D
Eon
3) Dinosaurs were the dominant life form during this Era
A
Paleozoic
B
PreCambrian
C
Mesozoic
D
Cenozoic
4) The Cenozoic Era is also known as the Age of
A
Dinosaurs
B
Bacteria
C
Fish
D
Mammals
5) Why didn't Trilobites lives during the Mesozoic Era?
A
Iron deposits on the ocean floor
B
Coal deposits where great forests once lived
C
the Permian Extinction or the Great Dying
D
Oxygenation of the atmosphere
6) Humans arrived during this most recent Era
A
PreCambrian
B
Cenozoic
C
Paleozoic
D
Mesozoic
7) During this Era fish and other soft bodied organisms lived in ancient seas for hundreds of millions of years
A
PreCambrian
B
Paleozoic
C
Mesozoic
D
Cenozoic
8) Which Era contains the Jurassic, Triassic and Cretaceous Periods?
A
Cenozoic
B
PreCambrian
C
Paleozoic
D
Mesozoic
9) During which time period did the continents form, life thrived as bacteria in the newly formed oceans, and the atmosphere began to fill with oxygen
A
Paleozoic
B
PreCambrian
C
Cenozoic
D
Mesozoic
10) Which Era ended with the greatest mass extinction in the history of Planet Earth, killing off nearly 95% of species?
A
Paleozoic
B
Mesozoic
C
Cenozoic
D
PreCambrian
*select an answer for all questions
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