How fossil fuel are formed? Describe a brief two
Answers
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.
Fossils play the following roles:
By determining the age of fossils we come to know the type of earth strata present at that time.
We can also know the type of animals and plants present on the earth at that time.
They help in establishing evolutionary relationship by providing connecting links.
Fossil fuels are dead and decay matter or remains of plants and animals which get decomposed under earth crust and due to high pressure and temperature remains get converted in to Fossils Fuels.
Fossils Fuels formed millions of years ago. The high pressure and temperature increase the quantity of carbon and it got under the process of carbonisation which makes it fuels.
Some of the important fossils Fuels are :-
Coal is a fossil fuel which is formed by the remains of plants millions years ago.
- Coals are generally used as domestic fuels.
- Anthracite coal has maximum percentage of carbon composition.
- Destructive distillation of coal gives various useful products.
Petroleum also known as crude oil is viscous dark liquid formed due to decomposition of marine animals under sea bed.
- Petroleum is refined under fractional distillation to gives useful products.
- Fractonal distillation of Petroleum gives Natural gas which is used in L.P.G cyllinders.