Question

how are fossil form.describe in brief two methods of determining the age of fossil

Answer 1

fossil are formed by remains of animal soft tissue decomposes and hard bones are left behind with passage of time sediment collect over it and hardens into rock.

Two methods of determining age of fossil are

Relative dating method - According to this method fossil which are near to surface of earth are more recent one and which are at more depth are older.

Absolute Dating method - Age of fossil is determined by calculating percentage of same isotope present in fossil.

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Answer 2

Fossils are formed due to the sedimentation .  Preserved traces of living organisms are called fossils . The 2 methods of determining the age of fossil are
1. Relative method:
we can determine he age of fossil by the presence of fossil in deep layers.
2.Detecting the ratios of different isotopes of the element in the fossil material.