What is Petroleum?

It is an oil obtained from rocks inside the earth

It is thick,dark coloured liquid and has an unpleasant smell.

It is used to make products like Diesel and Petrol


Where is Petroleum found?

It is found deep inside the earth between 2 layers of impervious rocks

(The rocks which do not allow oil to pass through them are called impervious rocks)

It is found above water as petroleum is lighter than water and floats over it

Earlier, petroleum oil wells were found only in land, now many oil wells are found in sea also

Oil wells are drilled to extract petroleum and natural gas




How is Petroleum formed?

It was formed from organisms living in sea

When they die,their bodies settle at bottom of ocean

These get covered with sand and clay

In millions of years,these dead organisms get converted into petroleum

This is due to high temperature, high pressure and absence of air



NCERT Question 8 - Explain the process of formation of petroleum.

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Why is Petroleum called Black Gold?

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When and where was the world’s first oil well drilled?

The world's first oil well was drilled in Pennsylvania,USA,in 1859.


Where was oil first found in India ?

Oil was first found in Assam in 1867 in India


Where is Oil found in India?

In India,oil is found in Assam,Gujarat,Mumbai High and in river basins of Godavari and Krishna.

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CA Maninder Singh is a Chartered Accountant for the past 13 years and a teacher from the past 17 years. He teaches Science, Economics, Accounting and English at Teachoo