EARTH SCIENCE
FOSSILS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The scientist should examine the rock layers.
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The scientist should examine atoms in the rock.
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The scientist should examine the fossil’s position in the rock
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The scientist should examine how deep in the rock the fossil was located.
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Detailed explanation-1: -To establish the age of a rock or a fossil, researchers use some type of clock to determine the date it was formed. Geologists commonly use radiometric dating methods, based on the natural radioactive decay of certain elements such as potassium and carbon, as reliable clocks to date ancient events.
Detailed explanation-2: -One of the best-known methods of absolute dating is called radiocarbon dating. Radiocarbon dating (often written shorthand to C-14 dating) is a method for dating sites by analyzing the amount of Carbon-14 (a radioactive isotope of carbon) found in organic remains like charcoal or bones.
Detailed explanation-3: -Once the organism dies, it stops replenishing its carbon supply, and the total carbon-14 content in the organism slowly disappears. Scientists can determine how long ago an organism died by measuring how much carbon-14 is left relative to the carbon-12.
Detailed explanation-4: -The age of fossils can be determined using stratigraphy, biostratigraphy, and radiocarbon dating.
Detailed explanation-5: -Relative method: The fossils present closer to the surface of the earth are more recent. Carbon dating method: The ratio of different isotopes of carbon is compared for the fossil and living organisms present today.