SCIENCE
EARTH SCIENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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They are less sure about earth’s age
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They now think earth is much younger
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They agree with those estimates from 1650
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They now thing the earth is much older
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Detailed explanation-1: -In 1650, an individual calculated that the earth was about 6, 000 years old. Since then, what has happened to scientists’ estimates of the earth’s age? Scientists now think the earth is much older.
Detailed explanation-2: -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-3: -All the data from Earth and beyond has led to the estimated age of 4.5 billion years for our planet.
Detailed explanation-4: -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-5: -How did the researchers determine these ages? When examining remnants from the past, experts use radiometric dating, a versatile technique that involves counting radioactive atoms of certain elements that are still present in a sample.