Earth History: Geological Time and Major Events
Explore the vast history of Earth, from its formation to the present day, covering major geological eras, significant biological events, and dating methods.
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Earth History: Geological Time and Major Events
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Read each question carefully and answer to the best of your ability. Show all work for calculations.
1. Which eon represents the earliest part of Earth's history, characterized by the formation of the Earth and Moon?
Phanerozoic Eon
Proterozoic Eon
Archean Eon
Hadean Eon
2. The Cambrian Explosion, a period of rapid diversification of most major animal phyla, occurred during which era?
Mesozoic Era
Cenozoic Era
Paleozoic Era
Precambrian Era
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 extinction event that wiped out the non-avian dinosaurs occurred at the boundary between the Cretaceous and periods.
5. Explain the significance of stromatolites in understanding early Earth history and the evolution of life.
6. Radiometric dating is a reliable method for determining the absolute age of rocks and fossils.
True
False
Match each geological era with a significant characteristic or event.
7. Paleozoic Era
a. Age of Mammals
8. Mesozoic Era
b. First abundant life forms
9. Cenozoic Era
c. Age of Reptiles (Dinosaurs)