NCERT Class 8 Science Coal And Petroleum

Read and download NCERT Class 8 Science Coal And Petroleum in NCERT book for Class 8 Science. You can download latest NCERT eBooks chapter wise in PDF format free from Studiestoday.com. This Science textbook for Class 8 is designed by NCERT and is very useful for students. Please also refer to the NCERT solutions for Class 8 Science to understand the answers of the exercise questions given at the end of this chapter

NCERT Book for Class 8 Science Chapter 5 Coal and Petroleum

Class 8 Science students should refer to the following NCERT Book Chapter 5 Coal and Petroleum in Class 8. This NCERT Book for Class 8 Science will be very useful for exams and help you to score good marks

Chapter 5 Coal and Petroleum NCERT Book Class 8

 

COAL AND PETROLEUM

We use various materials for our basic needs. Some of them are found in nature and some have been made by human efforts.

Can air, water and soil be exhausted by human activities? You have already studied about water in Class VII. Is water a limitless resource? In the light of the availability of various resources in nature, natural resources can be broadly classified into two kinds: Inexhaustible Natural Resources These resources are present in unlimited quantity in nature and are not likely to be exhausted by human activities. Examples are: sunlight, air. Exhaustible Natural Resources The amount of these resources in nature is limited. They can be exhausted by human activities. Examples of these resources are forests, wildlife, minerals, coal, petroleum, natural gas etc.

5.1 Coal

You may have seen coal, or heard about it (Fig. 5.1). It is as hard as stone and is black in colour Coal is one of the fuels used to cook food. Earlier, it was used in railway engines to produce steam to run the engine. It is also used in thermal power  plants to produce electricity. Coal is alsoused as a fuel in various industries.

Story of Coal:

About 300 million years ago the earth had dense forests in low lying wetland areas. Due to natural processes like flooding, these forests got buriedunder the soil. As more soil deposited over them, they were compressed. The temperature also rose as they sank deeper and deeper. Under high pressure and high temperature, dead plants got slowly converted to coal. As coal contains mainly carbon, the slow process of conversion of dead vegetation into coal is called carbonisation. Since it was formed from the remains of vegetation, coal is also called a fossil When heated in air, coal burns and produces mainly carbon dioxide gas.

Coal is processed in industry to get some useful products such as coke, coal tar and coal gas.

A. Coke

It is a tough, porous and black substance. It is almost pure form of carbon. Coke is used in the manufactureof steel and in the extraction of manymetals.

B. Coal tar

It is a black, thick liquid (Fig. 5.3) with unpleasant smell. It is a mixture of about 200 substances. Products obtained from coal tar are used as starting materials for manufacturing various substances used in everyday life and in industry, like synthetic dyes, drugs, explosives, perfumes, plastics, paints, photographic materials, roofing materials, etc. Interestingly, naphthalene balls used to repel moths and other insects are also obtained fromcoal tar.

C. Coal gas

Coal gas is obtained during the processing of coal to get coke. It is used as a fuel in many industries situated near the coal processing plants.

5.2 Petroleum

You know that petrol is used as a fuel in light automobiles such as motor cycles/ scooters and cars. Heavy motor vehicles like trucks and tractors run on diesel. Petrol and diesel are obtained from a natural resource called petroleum. Do you know how petroleum is formed? Petroleum was formed from organisms living in the sea. As these organisms died, their bodies settled at the bottom of the sea and got covered with layers of sand and clay. Over millions of years, absence of air, high temperature and high pressure transformed the dead organisms into petroleum and natural gas.

Exercises

1. What are the advantages of using CNG and LPG as fuels?

2. Name the petroleum product used for surfacing of roads.

3. Describe how coal is formed from dead vegetation. What is this process called?

4. Fill in the blanks :

(a) Fossil fuels are , and .

(b) Process of separation of different constituents from petroleum is called .

(c) Least polluting fuel for vehicle is .

5. Tick True/False against the following statements :

(a) Fossil fuels can be made in the laboratory. (T/F)

(b) CNG is more polluting fuel than petrol. (T/F)

(c) Coke is almost pure form of carbon. (T/F)

(d) Coal tar is a mixture of various substances. (T/F)

(e) Kerosene is not a fossil fuel. (T/F)

6. Explain why fossil fuels are exhaustible natural resources. COAL AND PETROLEUM 

7. Describe characteristics and uses of coke.

8. Explain the process of formation of petroleum.

Extended Learning — Activities and Projects

1. Get an outline map of India. Mark the places in the map where coal, petroleum and natural gas are found. Show the places wherepetroleum refineries are situated.

2. Choose any five families of your neighbourhood. Enquire whether their energy consumption (coal, gas, electricity, petrol, kerosene) has increased or decreased in the last five years. Enquire also about the measures they adopt to conserve energy.

3. Find out the location of major thermal power plants in India. What could be the reasons for their being located at those places?


Please refer to attached file for NCERT Class 8 Science Coal And Petroleum

Chapter 01 Crop Production and Management
NCERT Class 8 Science Crop Production And Management
Chapter 02 Microorganisms: Friend or Foe
NCERT Class 8 Science Microorganisms Friend And Foe
Chapter 03 Synthetic Fibres and Plastics
NCERT Class 8 Science Synthetic Fibres And Plastics
Chapter 04 Materials Metals and Non-Metals
NCERT Class 8 Science Materials Metals And Non Metals
Chapter 05 Coal and Petroleum
NCERT Class 8 Science Coal And Petroleum
Chapter 06 Combustion and Flame
NCERT Class 8 Science Combustion And Flame
Chapter 07 Conservation of Plants and Animals
NCERT Class 8 Science Conservation Of Plants And Animals
Chapter 08 Cell Structure and Functions
NCERT Class 8 Science Cell Structure And Functions
Chapter 09 Reproduction in Animals
NCERT Class 8 Science Reproduction In Animals
Chapter 10 Reaching the Age of Adolescence
NCERT Class 8 Science Reaching The Age Of Adolescence
Chapter 11 Force and Pressure
NCERT Class 8 Science Force And Pressure
Chapter 12 Friction
NCERT Class 8 Science Friction
Chapter 14 Chemical Effects of Electric Current
NCERT Class 8 Science Chemical Effects Of Electric Current
Chapter 15 Some Natural Phenomena
NCERT Class 8 Science Some Natural Phenomena
Chapter 17 Stars and the Solar System
NCERT Class 8 Science Stars And The Solar System
Chapter 18 Pollution of Air and Water
NCERT Class 8 Science Pollution Of Air And Water
Other Topics Class 8 Science
CBSE Class 8 Science Activity A Forseful Story
CBSE Class 8 Science Activity A Friend Indeed
CBSE Class 8 Science Activity A Mouldy Party
CBSE Class 8 Science Activity A Surprising Fact
CBSE Class 8 Science Activity A Tree Study
CBSE Class 8 Science Activity Back to the Earth
CBSE Class 8 Science Activity Bring Back The Shine
CBSE Class 8 Science Activity Delightful Daydreams
CBSE Class 8 Science Activity Egg Pops Into a Bottle
CBSE Class 8 Science Activity Growing Up
CBSE Class 8 Science Activity How Does Sound Travel
CBSE Class 8 Science Activity I Can See it
CBSE Class 8 Science Activity I Can See My Sound
CBSE Class 8 Science Activity Inside Story
CBSE Class 8 Science Activity Interview
CBSE Class 8 Science Activity Is The Moon Growing
CBSE Class 8 Science Activity Its CO2 Again
CBSE Class 8 Science Activity Just for Fun
CBSE Class 8 Science Activity Lets Make Music
CBSE Class 8 Science Activity Lighter or Heavier
CBSE Class 8 Science Activity Make A Periscope
CBSE Class 8 Science Activity Make Your Little Movie
CBSE Class 8 Science Activity Making a Solar System Model
CBSE Class 8 Science Activity Mysterious Forces
CBSE Class 8 Science Activity Pitcher Power
CBSE Class 8 Science Activity Please Hear
CBSE Class 8 Science Activity Spore Magic
CBSE Class 8 Science Activity Stages of Human Reproduction
CBSE Class 8 Science Activity Story of Granny
CBSE Class 8 Science Activity Suno Suno
CBSE Class 8 Science Activity The Ball Bearing
CBSE Class 8 Science Activity The Puzzling Letters
CBSE Class 8 Science Activity The Story of Magdeberg Hemisphere
CBSE Class 8 Science Activity The Tug of War
CBSE Class 8 Science Activity Want to be a Snake Charmer
CBSE Class 8 Science Activity What Makes Water
CBSE Class 8 Science Activity Wndow to our Rish BioDiversity
CBSE Class 8 Science Poster Making

Science NCERT Book Class 8 Chapter 5 Coal and Petroleum

The above NCERT Books for Class 8 Science Chapter 5 Coal and Petroleum have been published by NCERT for latest academic session. The textbook by NCERT for Chapter 5 Coal and Petroleum Science Class 8 is being used by various schools and almost all education boards in India. Teachers have always recommended students to refer to Chapter 5 Coal and Petroleum NCERT etextbooks as the exams for Class 8 Science are always asked as per the syllabus defined in these ebooks. These Class 8 Chapter 5 Coal and Petroleum book for Science also includes collection of question. We have also provided NCERT solutions for Class 8 Science which have been developed by teachers of StudiesToday.com after thorough review of the latest book and based on pattern of questions in upcoming exams for Class 8 students.

NCERT Book Class 8 Science Chapter 5 Coal and Petroleum

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Chapter 5 Coal and Petroleum NCERT Book Class 8 Science

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Class 8 Chapter 5 Coal and Petroleum NCERT Book Science

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