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What percentage does the precambrian represent of the earth's history?
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∙ 12y ago
About 87%
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∙ 12y ago
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Can you determine exact dates for the history of earths history by rock layers?
2/27/96 IS THE MOST IMPORTENT
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.
Did the British Empire ever covered more than a quarter of the earth's surface?
It covered exactly 25% of the Earths surface.
What is the earths diameter in km?
The diameter of the earth at the equator is 12,756 kilometers. The earth slightly bulges at the equator slightly elongating the distance.
How do internal and external forces cause changes to Earths surface?
Most common change to the Earths surface from internal forces would most likely be earthquakes and volcano eruptions. External forces could be considered meteor strikes, or possibly the effects of gravity on the oceans ( Tides ) Global warming is also melting glaciers and causing a growth in arid regions. kapm
What are the 4 eras in earths history?
The four eras in Earth's history are the Precambrian, Paleozoic, Mesozoic, and Cenozoic eras. They represent different periods of time with distinct geological and biological characteristics.
What is the largest era and what percentage of earths history does it make up?
The largest era in Earth's history is the Precambrian, which spans from the formation of Earth around 4.6 billion years ago to the beginning of the Phanerozoic eon around 541 million years ago. The Precambrian makes up about 88% of Earth's history.
What geologic period lasted seven eighths of the earths history?
The Precambrian time
What time period represents 88 percent of earths history?
The Precambrian Time
What was earths atmosphere oceans and continents began to form during a period of earths history called?
precambrian era
What percenatge does the precambrian era take up in the earths history?
The precambrian era lasted from roughly 4.57 Ga to 0.54 Ga before today, equalling about 88 % of Earth's history.
How much of earths history took place during the Precambrian Eon?
4 billon years i think
Precambrian Time which includes most of Earths history began with?
The Precambrian time, which includes the majority of Earth's history, began approximately 4.6 billion years ago with the formation of the Earth. This time period encompasses about 88% of geologic time and is divided into the Hadean, Archean, and Proterozoic eons.
What is precambrian order?
85% of earths history and the earliest era that exists. bacteria mostly survived then and built up oxygen until a mass extinction.The. Era had many extinctions because of large variations in climate is what mesozoicor cenozoic or precambrian which one
What gas was lacking from earths early atmosphere in the early precambrian?
oxygen
How much of the earths history does the pre-Cambrian era account for?
The Precambrian Super-Eon lasted from Earths creation 4.54 billion years ago until the Cambrian Period 542 million years ago. Some 3.998 billion years. This accounts for about 88% of Earth's history.
What happened during precambrian time?
Over most of Precambrian time 80 percent of earths history-the only life forms are bacteria ,which appear about 3,500 million years ago. multiple-cells marine animals like spriggina appear at the end of the era
