Question

find out why layer of petroleum and gas is found above that of water deep iside the earth crust

Answer 1

Solution :-

Petroleum is a dark coloured, thick crude oil found deep below the ground in certain areas. The name 'Petroleum' means rock oil. It is called petroleum because it is found under the crust of Earth trapped in rocks.

It occurs deep under the surface of Earth between two layer of impervious rocks. It is lighter than water, so it floats over water and so it is found above water. Petroleum oil deposits are usually found mixed with water, salt and Earth particles. Natural gas occurs above above the petroleum oil trapped under the rocks.

Answer 2

As , petroleum is lighter than water , it floats over water .

That's why , petroleum occurs b/w the two layers of the impervious rocks .