Answer:
1867: Alaska territory purchased from Russia for $7 million. 1898: Hawaii annexed as a United States territory. 1959: Alaska and Hawaii admitted, respectively, as the 49th and 50th states of the Union.
Explanation:
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Answer:
The Paleozoic (or Palaeozoic) Era "old" and zōḗ, "life", meaning "ancient life") is the earliest of three geologic eras of the Phanerozoic Eon. It is the longest of the Phanerozoic eras, lasting from 541 to 251.902 million years ago, and is subdivided into six geologic periods (from oldest to youngest): the Cambrian, Ordovician, Silurian, Devonian, Carboniferous, and Permian. The Paleozoic comes after the Neoproterozoic Era of the Proterozoic Eon and is followed by the Mesozoic Era.
Explanation:
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