SCIENCE
EARTH SCIENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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events are arranged in a chronological order
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divided into four eras
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each era is further divided into years
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each era is further divided into smaller periods
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Detailed explanation-1: -The geologic time scale is the “calendar” for events in Earth history. It subdivides all time into named units of abstract time called-in descending order of duration-eons, eras, periods, epochs, and ages.
Detailed explanation-2: -The eras are the four major divisions of the geological time scale: Precambrian, Paleozoic, Mesozoic, and Cenozoic.
Detailed explanation-3: -Strictly speaking, Precambrian Time is not an actual era due to the lack of diversity of life, however, it’s still considered significant because it predates the other three eras and may hold clues as to how all life on Earth eventually came to be.
Detailed explanation-4: -Eons. The eon is the broadest category of geological time. Eras. Periods. Epochs and Ages. The Geological Time Scale.