Chapter 5 Coal and Petroleum Class 8 Notes | EduRev

Science - Short Notes for Class 8th

Created by: Sushil Solanki

Class 8 : Chapter 5 Coal and Petroleum Class 8 Notes | EduRev

 Page 1


Chapter 5 Coal and Petroleum 
 
Coal 
Formation – It is formed from the plants that were buried under the Earth’s crust millions of years ago. These plants under 
the pressure of heat (from the core and mantle of the Earth) and pressure of the Earth’s crust formed coal. 
Carbonization – the process of conversion of dead plants into coal under heat and pressure in millions of years. 
 
 
Petroleum 
Formation –  Petroleum is formed from the dead animals that were buried under the Earth crust. These animals 
under heat of the Earth’s core and pressure of the ocean and Earth crust turned into petroleum. 
Refining – the process of separating the constituents of petroleum such as petrol, diesel, kerosene and other 
substances is known refining. 
Uses 
1. Liquefied petroleum gas is used as fuel in industries and homes. 
2. Petrol, kerosene and diesel are used in vehicles, aircrafts and electric generators. 
3. Lubricating oil obtained during refining is used in lubrication of vehicle parts. 
4. Paraffin wax is used in making candles and ointments. 
5. Bitumen is used in paints and surfacing of roads. 
Resource – Anything that satisfy human needs
Exhaustible Resources - Resources that are limited and can be finished by humans. 
e.g. Coal, Petroleum
Exhaustible Resources - Resources that are unlimited and cannot be finished by 
humans. e.g. Air, Solar energy.
C
O
A
L
Coke -
tough, porous and black.
Used to produce steel and to extract some metals.
Coal tar -
Black, liquid and a mixture of several substances.
Products obtained from Coal tar are used in dyes, 
explosives, plastics, roofing material and perfumes.
used to produce naphthalene balls.
Coal Gas
produced while getting coke from coal.
used as fuel in industries.
Page 2


Chapter 5 Coal and Petroleum 
 
Coal 
Formation – It is formed from the plants that were buried under the Earth’s crust millions of years ago. These plants under 
the pressure of heat (from the core and mantle of the Earth) and pressure of the Earth’s crust formed coal. 
Carbonization – the process of conversion of dead plants into coal under heat and pressure in millions of years. 
 
 
Petroleum 
Formation –  Petroleum is formed from the dead animals that were buried under the Earth crust. These animals 
under heat of the Earth’s core and pressure of the ocean and Earth crust turned into petroleum. 
Refining – the process of separating the constituents of petroleum such as petrol, diesel, kerosene and other 
substances is known refining. 
Uses 
1. Liquefied petroleum gas is used as fuel in industries and homes. 
2. Petrol, kerosene and diesel are used in vehicles, aircrafts and electric generators. 
3. Lubricating oil obtained during refining is used in lubrication of vehicle parts. 
4. Paraffin wax is used in making candles and ointments. 
5. Bitumen is used in paints and surfacing of roads. 
Resource – Anything that satisfy human needs
Exhaustible Resources - Resources that are limited and can be finished by humans. 
e.g. Coal, Petroleum
Exhaustible Resources - Resources that are unlimited and cannot be finished by 
humans. e.g. Air, Solar energy.
C
O
A
L
Coke -
tough, porous and black.
Used to produce steel and to extract some metals.
Coal tar -
Black, liquid and a mixture of several substances.
Products obtained from Coal tar are used in dyes, 
explosives, plastics, roofing material and perfumes.
used to produce naphthalene balls.
Coal Gas
produced while getting coke from coal.
used as fuel in industries.
 
 
Natural Gas 
Formation – Natural gas is formed from the dead plants and animals that were buried under the Earth’s crust 
under extreme heat and pressure. 
It is stored in liquid form under high pressure and is therefore known as Compressed Natural Gas or CNG 
Natural gas reserves are found in Tripura, Rajasthan and Maharashtra. 
It is mainly used as fuel in industries and vehicles. 
Advantages of Natural gas over other fuels: 
1. It is a clear fuel and does not cause pollution. 
2. It can be supplied easily through pipes. 
3. It is used in the production of chemicals and fertilizers 
 
Read More

Share with a friend

Complete Syllabus of Class 8

Dynamic Test

Content Category

Related Searches

Important questions

,

Extra Questions

,

practice quizzes

,

shortcuts and tricks

,

pdf

,

Viva Questions

,

Free

,

Chapter 5 Coal and Petroleum Class 8 Notes | EduRev

,

Semester Notes

,

video lectures

,

Chapter 5 Coal and Petroleum Class 8 Notes | EduRev

,

Summary

,

Chapter 5 Coal and Petroleum Class 8 Notes | EduRev

,

ppt

,

MCQs

,

mock tests for examination

,

Exam

,

Sample Paper

,

past year papers

,

Objective type Questions

,

Previous Year Questions with Solutions

,

study material

;