Geologic Time Scale Exploration
Explore the major eons, eras, periods, and epochs of Earth's history, significant events, and life forms within the geologic time scale.
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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 complete sentences for short answer questions.
1. Which eon represents the earliest part of Earth's history, characterized by the formation of the Earth and the Moon?
Phanerozoic Eon
Proterozoic Eon
Archean Eon
Hadean Eon
2. The Mesozoic Era is often referred to as the 'Age of Reptiles' due to the dominance of:
Mammals
Dinosaurs
Fish
Insects
3. The Geologic Time Scale is divided into major units called , which are further subdivided into , and then into .
4. The Cambrian Explosion, a period of rapid diversification of life, occurred at the beginning of the Period.
5. The Cenozoic Era is the current era and is often called the 'Age of Mammals'.
True
False
6. The extinction event that wiped out the dinosaurs occurred at the end of the Permian Period.
True
False
7. Briefly explain why the Geologic Time Scale is not uniform in its divisions (e.g., some periods are much longer than others).
8. Describe one major biological or geological event that occurred during the Precambrian Eon.
Match each geological period/era with a significant event or characteristic.
9. Paleozoic Era
a. Formation of Pangaea
10. Cretaceous Period
b. First flowering plants
11. Jurassic Period
c. Dominance of large dinosaurs
12. Triassic Period
d. First mammals appear
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