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Geologic Time Scale is a system of chronological measurement that relates stratigraphy (study of rock layers) to time, used by geologists, paleontologists, and other earth scientists to describe the timing and relationships between events that have occurred during Earth's history.

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Geologic Time Scale is important because it organizes Earth's history into eras, periods, and epochs. It helps us understand the historical events, climatic changes, and life forms of the different time periods.

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Geologic Time Scale is divided into several eras: The Precambrian, Paleozoic, Mesozoic, and Cenozoic. These eras are further divided into periods, epochs, and ages.

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Radiometric dating and relative dating are two techniques used by scientists to date rocks and understand the age of Earth. These techniques help in establishing the Geologic Time Scale.

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Significant Earth's events like formation of continents, extinction of species, and climate changes are recorded in the Geologic Time Scale. It gives us an insight into Earth's past.

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Rock Strata refers to layers of sedimentary rocks that are stacked one on top of another. By analyzing these layers, we can understand the age of rocks and the events that occurred at that time period.