SCIENCE
EARTH SCIENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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50.6 million years
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4.5 billion years old
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4.5 million years old
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4.5 trillion years old
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Detailed explanation-1: -Earth is estimated to be 4.54 billion years old, plus or minus about 50 million years. Scientists have scoured the Earth searching for the oldest rocks to radiometrically date. In northwestern Canada, they discovered rocks about 4.03 billion years old.
Detailed explanation-2: -An age of 4.55 ± 0.07 billion years, very close to today’s accepted age, was determined by Clair Cameron Patterson using uranium–lead isotope dating (specifically lead–lead dating) on several meteorites including the Canyon Diablo meteorite and published in 1956.
Detailed explanation-3: -By dating the rocks in Earth’s ever-changing crust, as well as the rocks in Earth’s neighbors, such as the moon and visiting meteorites, scientists have calculated that Earth is 4.54 billion years old, with an error range of 50 million years.
Detailed explanation-4: -Once upon a time, about 4.5 billion years ago, the Earth was an unformed doughnut of molten rock called a synestia-and the moon was hidden in the filling.
Detailed explanation-5: -4.5 billion years is 1.6 trillion days.