EARTH SCIENCE
FOSSILS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Precambrian Eon
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Paleozoic Era
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Mesozoic Era
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Cenozoic Era
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Detailed explanation-1: -The geological time scale is divided firstly into four eons: from earliest to most recent, these are the Hadean, Archean, Proterozoic, and Phanerozoic. Eons are further divided into eras. Periods, epochs, and ages are divisions of eras.
Detailed explanation-2: -Carbon gases in the Archean: CO2, CH4, and CO. Let us now consider carbon gases, starting with carbon dioxide. Since the early Hadean, CO2 has probably always been Earth’s most important noncondensable greenhouse gas.
Detailed explanation-3: -Hadean Eon During Hadean time, the solar system was forming within a cloud of dust and gas known as the solar nebula, which eventually spawned asteroids, comets, moons and planets. Astrogeophysicists theorize that about 4.52 billion years ago the proto-Earth collided with a Mars-size planetoid named Theia.
Detailed explanation-4: -The oldest minerals are the aforementioned grains of zircon, which were found in the Jack Hills of Australia.