Geological Time Periods: Precambrian and Paleozoic

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What is the Precambrian period?
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The Precambrian is the earliest part of Earth's history, before the Cambrian period, covering around 88% of Earth's geological timeline.
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What major event marks the start of the Paleozoic Era?
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The Cambrian Explosion marks the start of the Paleozoic Era, around 541 million years ago.
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What is significant about the Ordovician period?
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The Ordovician period is known for the diversification of marine life and the first appearance of land plants.
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What caused the end of the Paleozoic Era?
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The end of the Paleozoic Era was marked by the Permian-Triassic Extinction, the largest mass extinction in Earth's history.
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Which era is known for the first appearance of fish?
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The Paleozoic Era is known for the first appearance of fish, particularly during the Cambrian period.
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