Geologic Time Scale Exploration
Explore the vastness of geologic time, major eras, and key events in Earth's history with this comprehensive worksheet for Grade 11 science students.
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Geologic Time Scale Exploration
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Date:
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Read each question carefully and provide your best answer. Refer to your knowledge of the geologic time scale and Earth's history.
1. Which eon represents the longest span of geologic time, covering Earth's formation to the appearance of abundant life?
Phanerozoic Eon
Proterozoic Eon
Archean Eon
Hadean Eon
2. The Mesozoic Era is known as the 'Age of Reptiles' and includes which three periods?
Cambrian, Ordovician, Silurian
Triassic, Jurassic, Cretaceous
Paleogene, Neogene, Quaternary
Permian, Carboniferous, Devonian
3. The principle of states that in an undisturbed sequence of sedimentary strata, the oldest layers are at the bottom and the youngest are at the top.
4. The largest mass extinction event in Earth's history occurred at the end of the Period.
5. Radiometric dating is a method used to determine the absolute age of rocks and fossils.
True
False
6. The Cenozoic Era is characterized by the diversification of mammals and the appearance of humans.
True
False
7. Briefly explain the significance of index fossils in correlating rock layers and determining relative ages.
8. Describe one major event or characteristic that defines the Precambrian Eon.
Match each term on the left with its definition on the right.
9. Era
a. Subdivision of a period
10. Period
b. Major division of geologic time, longer than a period
11. Epoch
c. Subdivision of an era, longer than an epoch