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Questions and Answers
How long ago did the formation of Earth occur?
How long ago did the formation of Earth occur?
- 4500 Ma (correct)
- 2500 Ma
- 3800 Ma
- 540 Ma
What is the informal name for the supereon comprising the eons that came before the current Phanerozoic eon?
What is the informal name for the supereon comprising the eons that came before the current Phanerozoic eon?
- Neoproterozoic eon
- Proterozoic eon
- Cambrian eon
- Precambrian eon (correct)
What marks the beginning of the Cambrian period?
What marks the beginning of the Cambrian period?
- Evolution of microorganisms
- Formation of the Precambrian eon
- Evolution of abundant macroscopic hardshelled animals (correct)
- Formation of Earth
Which Precambrian eon is divided into three eras: the Neoproterozoic, Mesoproterozoic, and Paleoproterozoic?
Which Precambrian eon is divided into three eras: the Neoproterozoic, Mesoproterozoic, and Paleoproterozoic?
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Rocks from which age were first studied in Wales, leading to the naming of Precambrian?
Rocks from which age were first studied in Wales, leading to the naming of Precambrian?
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