Geologic Time Scale Exploration
This worksheet explores the fundamental concepts of the geologic time scale, including eons, eras, periods, and significant events in Earth's history.
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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 to complete the tasks.
1. Which eon represents the earliest part of Earth's history, before the existence of abundant life?
Phanerozoic Eon
Proterozoic Eon
Archean Eon
Hadean Eon
2. The Mesozoic Era is known as the 'Age of '.
Mammals
Fishes
Reptiles
Amphibians
3. The largest division of geologic time is called an .
4. The extinction event that wiped out the dinosaurs occurred at the end of the Period.
5. The Cenozoic Era is the current geologic era.
True
False
6. The Paleozoic Era saw the rise of complex marine life and the first land plants.
True
False
7. Briefly explain why scientists use the geologic time scale to organize Earth's history.
Use the words below to complete the sentences.
8. The Era is characterized by the diversification of flowering plants and the evolution of humans.
9. The vast expanse of time before the Paleozoic Era is referred to as the Supereon.
Match the geologic time division with its defining characteristic.
10. Eon
a. Smallest division of time within a period
11. Era
b. Largest division of geologic time
12. Period
c. Division of an eon, characterized by major changes in life forms
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