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Tribal Era (Agricultural Revolution)
Frontier Era (Lets conquer the wilderness)
Early Conservation Era (lets preserve the wilderness)
Environmental Era (60s- science, 70s- regulation, 80s- business)
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What are the four major eras of earths history?
1. Precambrian Era (earliest forms of life, such as bacteria and blue-green algae; later in the period, invertebrates such as jellyfish).2. Paleozoic Era (Pangaea; invertebrate life, such as trilobites, later in the era, followed by development of vertebrates, including fish; development of vertebrates, amphibians, and the beginnings of reptiles; development of simple plants, such as mosses and ferns)3. Mesozoic Era (Pangaea separates into continents; "Age of Reptiles"; dinosaurs, flowering plants, small mammals and birds)4. Cenozoic (Present Era) Ice Age; mammoths; gradual development of mammals, birds and other animals recognizable today; humans; flowering plants, forests, grasslands.)Edit:Actually the above answer can be disputed. The Precambrian is not considered an era, it is considered a supereon that is divided into three eons. Two of these eons are subdivided into a total of seven eras. Combine that with the three eras of the Phanerozoic Eon, and you have ten.So this question doesn't really make sense, considering there are actually ten eras.
What are the eight themes of history?
The 8 themes for US history are 1.) Athority of Power and Money 2.) Religious and Ethical Systems 3.) Revolution 4.) Interaction with the Environment 5.) Economics 6.) Cultural Interaction 7.) Empire Building 8.) Science and Technology
What is the biggest public works project in history?
No doubt, exploration of Western Siberia in 1965-1980, the largest Soviet oil province, the giant cold swamp, which size is equivalent to 1/4 of all US territory. It was a many-trillion project (in modern US dollars), hundreds of new towns and cities were built. Result was an economical overload and disbalance, leading the to collapse of the USSR.
What are the four phases of the earth's history?
Who had the Biggest empire in history?
Britain did, holding over 1/4 of the total land mass, 'The British Colonial Empire'
Who divided Media history into 4 eras?
Denis McQuail
What are the 4 eras in earths history?
precambrian era, paleozoic era, mesozoics era, cenozoic era
What are the three eras of geologic time?
There are 4 eras, and they are the Hadean, Archean, Proterozoic, and Phanerozoic eras.
What are the prehistoric eras?
There are so far 4 Eras in the earths history. the one that started the beginning if the earths history: Precambrian Time. The one after that was the Paleozoic Era, which means "ancient life." next was mesozoic which means "middle life" the one we are in is called the Cenozoic Era which means" recent life." * All Eras ended with a mass extinction.
How many eras make up the geologic time scale?
Four eras. that is Cenozoic,mesozoic,paleozoic and precambrian
How many eras has the earth had?
The Earth has had 4 eras. The Precambrian time, Paleozoic era, Mesozoic, and the era we are in now, the Cenozoic.
What are all 4 eras from largest to smallest?
Precambrian, Paleozoic, Mesozoic, and Cenozoic.
How many eras are in Yu-Gi-Oh?
4 if you count the capsule monsters
How many mints in the US?
In the history of the US there have been 8 mints. Today there are 4 in use.
What are the release dates for Freedom A History of Us - 2003 Wake Up America 1-4?
Freedom A History of Us - 2003 Wake Up America 1-4 was released on: USA: 2003
What is the 4 eras of Technology?
Stone Age, Industrial Era, Agricultural Era, and Information Era
What is the most useful engine in US?
focus on 4 engineering fields which are: 1) electrical engineering 2) mechanical engineering 3) civil engineering 4) environmental engineering ,
