Question

What is the meant by fossils how they formed state two ways of estimsting the ge of fossils?

Answer 1

fossils are the remains of dead animals which are kept under earth for millions of years

Answer 2

Fossils are dead remains of animals and plants from remote past.
Fossils are formed when dead organisms are not completely decomposed. The organisms may get trapped in resins of tree, lava of volcanoes or hot mud, which when hardens retains the animal’s parts thus forming fossils.
Two methods of determining the age of fossils are:

Relative method: By estimating the age of the layer of earth’s crust where the fossil is found. Fossils near the surface are recent and those in the deeper layers are more ancient.

Radio-carbon dating method: By detecting the ratios of different isotopes of carbon in the fossils.