OBJECTIVE LIFE SCIENCE
EVOLUTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Are there multiple index fossils?
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Are the local sediments undisturbed?
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Are there only a few fossils of each species found?
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Are the local sedimentary layers of equal height?
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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: -The numerical ages of rocks in the Geologic Time Scale are determined by radiometric dating, which makes use of a process called radioactive decay – the same process that goes on inside a nuclear reactor to produce heat to make electricity. Radiometric dating works because radioactive elements decay at a known rate.
Detailed explanation-3: -RELATIVE DATING relative age-older or younger-is based on the location where a given fossil occurs in a layered sequence of sedimentary rocks. fossils buried in the lower layers are older than those encased in the upper strata, which were formed by more recent deposits.
Detailed explanation-4: -The law of superposition is a geologic principle used to determine the relative ages of rock layers.