Geologic Time Scale Exploration
Explore the vastness of Earth's history through the Geologic Time Scale, understanding major eras, periods, and significant life forms.
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Geologic Time Scale Exploration
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Read each question carefully and answer to the best of your ability. Use your knowledge of the Geologic Time Scale.
1. Which eon represents the earliest part of Earth's history, before abundant life with hard parts evolved?
Phanerozoic Eon
Proterozoic Eon
Archean Eon
Precambrian Eon
2. The Mesozoic Era is known as the 'Age of Reptiles'. Which of these periods belongs to the Mesozoic Era?
Paleogene Period
Jurassic Period
Permian Period
Devonian Period
3. The Geologic Time Scale divides Earth's history into eons, eras, periods, and .
4. The extinction event that wiped out the dinosaurs occurred at the end of the Period.
5. The Cenozoic Era is also known as the 'Age of '.
6. The Phanerozoic Eon represents roughly 88% of Earth's total history.
True
False
7. Humans first appeared during the Paleozoic Era.
True
False
8. Briefly explain why scientists use the Geologic Time Scale.
Match each geological term with its description.
9. Eon
a. The smallest unit of geologic time
10. Era
b. A major division of an eon, characterized by major changes in life forms
11. Period
c. The longest division of geologic time