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What are the 4 eras in earths history?
precambrian era, paleozoic era, mesozoics era, cenozoic era
Which era of geologic time spans about 87 percent of Earth's history?
Precambrian
About 88 percent of earth's history is within the expanse of time before the phanerozoic era which is called the?
precambrian
What percent of the earth history is the mesozoic era responsible for?
90
What are the different era's and their characteristics?
Mesozoic era: Tyrannosaurus Rex lived.End of the Paleozoic era: The largest mass extinction happened.Paleozoic era: Life exploded for the first time.End of the Mesozoic era: The Chicxulub crater formed.Mesozoic era: The dinosaurs became common.End of the Paleozoic era: 95 percent of species died out.Paleozoic era: Land-based animals first became common.End of the Mesozoic era: Dinosaurs became suddenly extinct.A.PrecambrianWhen life first flourished on EarthB.MesozoicThe era before the current oneC.PaleozoicThe first eraD.CenozoicThe current era
What are the 4 eras in earths history?
precambrian era, paleozoic era, mesozoics era, cenozoic era
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.
Which era of geologic time spans about 87 percent of Earth's history?
Precambrian
Which eon did most of earths history occur in?
Most of Earth's history has occurred in the Precambrian Era, a time span of over 4 billion years.
What era makes up the vast majority earth's history?
Precambrian
According to its name the archaeozoic era of earths history was characterized by what type of life form?
unicellular organisms are earliest forms of life
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.
About 88 percent of earth's history is within the expanse of time before the phanerozoic era which is called the?
precambrian
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
What happen during the Precambrian time period?
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
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.
