16 Questions
What are the three parts that the Precambrian Eon was broken into?
Hadean, Archean, Proterozoic
When did the Hadean Eon begin and end?
Began 4.6 billion years ago, ended 4 billion years ago
Who coined the term 'Hadean' and when?
Geologist Preston Cloud in 1972
What were Hadean rocks largely consisting of?
Granular zircons from one locality in Western Australia
What did the Earth's atmosphere contain during the Archean period?
Methane with little to no oxygen
What did the early Earth's atmosphere contain during the Hadean period?
Carbon dioxide and methane
During which era did the oxygen level of Earth reach 3%, leading to the rise of multicellular organisms?
Proterozoic Era
What are the three geologic eras that the Proterozoic Era is subdivided into?
Paleoproterozoic, Mesoproterozoic, Neoproterozoic
What is the Phanerozoic Eon known as?
Eon of visible life
How many parts is the Phanerozoic Eon broken into?
Three
What marks the beginning of the Paleozoic Era?
Cambrian explosion
What was formed during the middle Paleozoic Era?
Marine life forms with shells
What began to appear during the late Paleozoic Era?
Reptiles
What is the Mesozoic Era also known as?
Age of Reptiles
Who introduced the phrase 'Age of Reptiles'?
Gideon Mantell
What started to break apart during the Mesozoic Era?
Pangaea
Test your knowledge of Earth's history through the Precambrian Period, including the Hadean, Archean, and Proterozoic Eons. Explore the significant events and developments that shaped the Earth during this ancient period.
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