Sources of Energy

D.A.V. PUBLIC SCHOOL, KHERA KHURD

CLASS: VIII

TOPIC: Sources of Energy

Assignment

Complete the following table.

PETROLEUM PRODUCTS	PROPERTIES	USES
Gasoline
Petroleum gas
Paraffin wax
Kerosene
Fuel oil
Asphalt
Lubricating oil
Diesel oil

Sources of Energy

D.A.V. PUBLIC SCHOOL, KHERA KHURD

CLASS: VIII

TOPIC: Sources of Energy

Assignment

1.     Answer the following questions.

                                i.            Which is the largest source of energy for the production of electricity?

                              ii.            What is petroleum? Give its other name.

                            iii.            What are the advantages of using Natural gas above other fuels?

2.     Match the following:

COAL COMPONENT	PROPERTY	USE
Coke	Domestic as well as industrial fuel	Extraction of metals from ores
Coal Tar	Black liquid of high viscosity	To make water gas
Coal Gas	Domestic fuel	Manufacturing perfumes and paints
		Making dyes, explosives and drugs
		Used in industries located near coal processing units

Sources of Energy

D.A.V. PUBLIC SCHOOL, KHERA KHURD

CLASS: VIII

TOPIC: Sources of Energy

Assignment

Look at the diagram below and answer the following questions.

                                i.            Name the process.

                              ii.            Why and how it is carried on?

                            iii.            Which grey porous residue is left behind in test tube?

                           iv.            How does the substance ‘D’ looks?

                             v.            What is the colour of ‘C’?

                           vi.            What is the nature of ‘B’?

                         vii.            The process of separating various components of petroleum into their useful form is called _________________.

Sources of Energy

D.A.V. PUBLIC SCHOOL, KHERA KHURD

CLASS: VIII

TOPIC: Sources of Energy

Assignment

Look at the diagram below and answer the following questions.

1.     How many types of coal are there? Name them.

2.     Which type of coal receives maximum heat and pressure?

3.     Which type of coal has highest percentage of carbon and volatile material in it and which has lowest?

4.     Complete the following diagram on the basis of their order of occurrence under the Earth’s crust.

LIGNITE