COAL AND PETROLEUM CLASS VIII

 COAL AND PETROLEUM 

 Natural resources can be classified into

Exhaustible and inexhaustible resources.

 Fossil fuels are formed from the dead remains of living organism under the earth over millions of years.

 Coal, petroleum and natural gas are fossil fuels.

 Coke, coal tar and coal gas are the products of coal.

 Petroleum is formed at the bottom from the remains of tiny organism called plankton.

 Petroleum gas, Petrol, Diesel, Kerosene, paraffin wax, lubricating oil are obtained by refining of petroleum.

 The natural gas is found sometimes along with petroleum and sometimes without petroleum.

 The useful substances which are obtained from petroleum and natural gas are called petrochemicals.

 Excessive use of fossil fuels causes air pollution, greenhouse effect, global warming and many health problems.

 Fossil fuel resources are very limited. We should think for the alternatives.

 Advances in science and technology have changed our lives.