Energy is defined as the ability to do work and exists in different forms that can be converted from one to another. Energy sources can be renewable like wind and solar that can be replenished, or non-renewable like fossil fuels that are limited. Fossil fuels are a conventional energy source but have disadvantages like pollution and contributing to climate change. They are not renewable as once burned, there is no more.

2. What is energy?
Energy is defined as the ability or the
capacity to do work.
Energy can neither be created nor be
destroyed.
Energy is in different forms and one
form can be converted to another.
Source of energy we use,to do work,is
consumed and cannot be used.

3. TYPES OF SOURCES
• RENEWABLE: CAN BE REGENERATED IN A SHORT
AMOUNT OF TIME OR IS BASICALLY UNLIMITED.
• NON-RENEWABLE: CAN’T BE REPLACED IN A
SHORT AMOUNT OF TIME AND IS LIMITED.

4. Energy
Non
renewable
petroleum coal
Renewable
Wind Hydro solar

6. • Kinetic Energy
• Potential Energy
• Thermal Energy
• Chemical Energy
• Electrical Energy
• Electrochemical Energy
• Electromagnetic Energy
Energy has a number of different forms, all of
which measure the ability of an object or
system to do work on another object or system.
• Sound Energy
• Nuclear Energy

7. Good source of
energy
Good source of energy would be one
• Which we would do a large amount of work
per unit volume or mass,
• Be easily accessible,
• Be easy to store and transport,and
• Most importantly,be economical(cheap price).

8. Conventional sources of energy
• The conventional sources of energy are
generally non-renewable sources of
energy, which are being used since a long
time. These sources of energy are being
used extensively in such a way that their
known reserves have been depleted to a
great extent.
• The coal, petroleum, natural gas and
electricity are conventional sources of
energy.

9. Conventional sources of energy

10. • Fossil fuels are fuels formed by natural
processes such as decomposition of buried
dead organisms.
• Fossil fuels contain high percentages
of carbon and include coal, petroleum,
and natural gas.
Fossil Fuels

12. Coal
Petroleum
and natural
gas
Hydro
Nuclear
Wind
Major sources of energy for our
requirements in India

13. Advantages of Fossil Fuels
• Very large amounts of electricity can be
generated in one place using coal, fairly
cheaply.
• Transporting oil and gas to the power
stations is easy.
• Gas-fired power stations are very
efficient.
• A fossil-fuelled power station can be
built almost anywhere.

14. Disadvantages of Fossil Fuels
• Basically, the main drawback of fossil fuels is
pollution.
• Burning any fossil fuel produces carbon dioxide,
which contributes to the "greenhouse effect",
warming the Earth.
• Burning coal produces sulphur dioxide, a gas that
contributes to acid rain.
• With the United States importing 55% of its oil, oil
spills are a serious problem
• Mining coal can be difficult and dangerous. Strip
mining destroys large areas of the landscape.

16. Is it renewable?
Fossil fuels are NOT a renewable energy
resource.
Once we've burned themall, there isn't any more, and
our consumption of fossil fuels has nearly doubled every
20 years since 1900.
This is a particular problemfor Oil, because we also use
it to make plastics and many other products.