Geologic Time Scale and Major Eras
Examine how the geologic time scale divides Earth's history into major eras based on rock and fossil records.
Questions
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MultiChoice
What is the Geologic Time Scale?
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What major events typically mark the boundaries between major geological eras?
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Which geological era is famous as the Age of Reptiles and Dinosaurs?
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In which geological era do humans and modern mammals live today?
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What is the largest, broadest division of geological time?
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Which era is characterized by early marine invertebrates, fish, and the first land plants?
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MultiChoice
Approximately how old is Planet Earth according to scientific geological evidence?
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Which major time span covers roughly 88 percent of Earth's total geological history?
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Which era began immediately following the mass extinction of non-avian dinosaurs?
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How were many geological periods (like the Devonian or Jurassic) originally named?
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What event brought a dramatic end to the Paleozoic Era?
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Which sequence lists geological time divisions in order from LARGEST to SMALLEST?