Page 1
CHAPTER - 14
SOURCES OF ENERGY
MADE BY-:
RAHAT
Page 2
CHAPTER - 14
SOURCES OF ENERGY
MADE BY-:
RAHAT
1) Characteristics of a good source of fuel :-
i) It should have a high energy output per unit mass or volume.
ii) It should be easily available.
iii) It should be easy to store and transport.
iv) It should be economical.
2) Sources of energy :-
There are two main sources of energy. They are conventional and
non conventional sources of energy.
i) Conventional sources of energy :- are wood, flowing water and
fossil fuels (coal, petroleum, natural gas).
ii) Non conventional sources of energy :- are solar energy, wind
energy, biomass energy, ocean energy (tidal energy, wave energy,
ocean thermal energy), geothermal energy, nuclear energy etc.
Some sources of energy are renewable like sun, wind, flowing water,
ocean, wood, biomass etc.
Some sources of energy are non renewable like coal, petroleum and
natural gas.
Page 3
CHAPTER - 14
SOURCES OF ENERGY
MADE BY-:
RAHAT
1) Characteristics of a good source of fuel :-
i) It should have a high energy output per unit mass or volume.
ii) It should be easily available.
iii) It should be easy to store and transport.
iv) It should be economical.
2) Sources of energy :-
There are two main sources of energy. They are conventional and
non conventional sources of energy.
i) Conventional sources of energy :- are wood, flowing water and
fossil fuels (coal, petroleum, natural gas).
ii) Non conventional sources of energy :- are solar energy, wind
energy, biomass energy, ocean energy (tidal energy, wave energy,
ocean thermal energy), geothermal energy, nuclear energy etc.
Some sources of energy are renewable like sun, wind, flowing water,
ocean, wood, biomass etc.
Some sources of energy are non renewable like coal, petroleum and
natural gas.
3. Conventional sources of energy :-
a) Fossil fuels :- are fuels formed inside the earth from the
remains of plants and animals after millions of years. The
fossil fuels are coal, petroleum and natural gas. Fossil
fuels are non renewable sources of energy so they
should be conserved and used judiciously.
Disadvantages of fossil fuels :-
i) Burning of fossil fuels release gases and harmful
particles which causes air pollution.
ii) Burning of fossil fuels release acidic oxides of sulphur
and nitrogen which causes acid rain which is harmful for
living organisms, affects soil and water, causes damage
to buildings, corrosion of metals etc.
iii) Burning of fossil fuels release a large amount of carbon
dioxide gas which increases the temperature of the
atmosphere and causes global warming (green house
effect).
Page 4
CHAPTER - 14
SOURCES OF ENERGY
MADE BY-:
RAHAT
1) Characteristics of a good source of fuel :-
i) It should have a high energy output per unit mass or volume.
ii) It should be easily available.
iii) It should be easy to store and transport.
iv) It should be economical.
2) Sources of energy :-
There are two main sources of energy. They are conventional and
non conventional sources of energy.
i) Conventional sources of energy :- are wood, flowing water and
fossil fuels (coal, petroleum, natural gas).
ii) Non conventional sources of energy :- are solar energy, wind
energy, biomass energy, ocean energy (tidal energy, wave energy,
ocean thermal energy), geothermal energy, nuclear energy etc.
Some sources of energy are renewable like sun, wind, flowing water,
ocean, wood, biomass etc.
Some sources of energy are non renewable like coal, petroleum and
natural gas.
3. Conventional sources of energy :-
a) Fossil fuels :- are fuels formed inside the earth from the
remains of plants and animals after millions of years. The
fossil fuels are coal, petroleum and natural gas. Fossil
fuels are non renewable sources of energy so they
should be conserved and used judiciously.
Disadvantages of fossil fuels :-
i) Burning of fossil fuels release gases and harmful
particles which causes air pollution.
ii) Burning of fossil fuels release acidic oxides of sulphur
and nitrogen which causes acid rain which is harmful for
living organisms, affects soil and water, causes damage
to buildings, corrosion of metals etc.
iii) Burning of fossil fuels release a large amount of carbon
dioxide gas which increases the temperature of the
atmosphere and causes global warming (green house
effect).
Page 5
CHAPTER - 14
SOURCES OF ENERGY
MADE BY-:
RAHAT
1) Characteristics of a good source of fuel :-
i) It should have a high energy output per unit mass or volume.
ii) It should be easily available.
iii) It should be easy to store and transport.
iv) It should be economical.
2) Sources of energy :-
There are two main sources of energy. They are conventional and
non conventional sources of energy.
i) Conventional sources of energy :- are wood, flowing water and
fossil fuels (coal, petroleum, natural gas).
ii) Non conventional sources of energy :- are solar energy, wind
energy, biomass energy, ocean energy (tidal energy, wave energy,
ocean thermal energy), geothermal energy, nuclear energy etc.
Some sources of energy are renewable like sun, wind, flowing water,
ocean, wood, biomass etc.
Some sources of energy are non renewable like coal, petroleum and
natural gas.
3. Conventional sources of energy :-
a) Fossil fuels :- are fuels formed inside the earth from the
remains of plants and animals after millions of years. The
fossil fuels are coal, petroleum and natural gas. Fossil
fuels are non renewable sources of energy so they
should be conserved and used judiciously.
Disadvantages of fossil fuels :-
i) Burning of fossil fuels release gases and harmful
particles which causes air pollution.
ii) Burning of fossil fuels release acidic oxides of sulphur
and nitrogen which causes acid rain which is harmful for
living organisms, affects soil and water, causes damage
to buildings, corrosion of metals etc.
iii) Burning of fossil fuels release a large amount of carbon
dioxide gas which increases the temperature of the
atmosphere and causes global warming (green house
effect).
b) Thermal power plants :-
In thermal power plants the heat energy produced by burning fossil
fuels like coal, petroleum or natural gas is used to heat water and
change it into steam which rotates the turbines of generators to produce
electricity.
c) Hydro power plants :-
In hydro power plants water from rivers are stored by constructing
dams. The water from the dam flows down through pipes and rotates the
turbines of generators to produce electricity.
Advantages :-
i) Flowing water is a renewable source of energy.
ii) The electricity produced does not cause pollution.
iii) The water stored in dams can also be used to control floods and
for irrigation.
Disadvantages :-
i) The initial cost is high.
ii) Large areas of land gets submerged and the decomposition of
vegetation produces methane gas which is a green house gas.
iii) It causes displacement of people from large areas of land.
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