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Q: What percentage does the precambrian represent of the earth's history?
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Can you determine exact dates for the history of earths history by rock layers?


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

Related questions

What time period represents 88 percent of earths history?

The Precambrian Time

What geologic period lasted seven eighths of the 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.

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.

How much of earths history took place during the Precambrian Eon?

4 billon years i think

What are the 4 eras in earths history?

precambrian era, paleozoic era, mesozoics era, cenozoic era

What percentage of the earths surface do the continents represent?

Continents cover about 29% of the Earth's surface area. The rest of the surface is predominantly ocean.

Which eon did most of earths history occur in?

Most of Earth's history occurred in the Proterozoic eon, which lasted from about 2.5 billion to 541 million years ago. This eon saw the rise of early life forms, the formation of continents, and significant changes in the Earth's atmosphere and oceans.

What percentage of earths history had life present?

Life has been present on Earth for approximately 85-90% of its 4.6 billion-year history, with evidence of microbial life dating back around 3.5 billion years. This indicates that microbial life existed on Earth for most of its existence.

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?