Earth is about 4.5 billion years old. In order to characterize the events that happened in this very long time scale, scientists have developed the geologic time scale. Here, the age of Earth is divided into (1), which in turn divided into (2), and are further subdivided into (3). The geologic time scale is so-called since the different subdivisions are based on the fossil record.

Q: HISTORY OF LIFE ON EARTH can safely opper layer hquake), ists then d in the cientist t level ter ago…

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Q: The pr O Allo O Dep radi O Alla dete O Pred

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A: Fossils are the remains of the organisms that were present on the earth in the past.

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Q: ស អាព AMMOND Jurassic an Cretaceous

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A:

Q: Which of the following sites, dated to about 300,000 years ago, has yielded the largest sample yet…

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Q: Transitional Fossils Eusthenopteron (fish) Tiktaalik Acanthostega

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Paleontology

A branch of science concerning the scientific study of life from ancient times is known as paleontology. The scientists working on paleontology are known as paleontologists. Paleontologists collect the fossils of organisms from ancient times to classify them. The paleontologists also study the environment from ancient times to study the interactions between different organisms.