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.

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.

Energy

Non renewable

petroleum coal

Renewable

Wind Hydro solar

What are the different forms of energy?

• Kinetic Energy• Potential Energy• Thermal Energy• Chemical Energy• Electrical Energy• Electrochemical Energy• Electromagnetic Energy• Light 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

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).

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.

Conventional sources of energy

• 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

CoalPetroleum and

natural gas

Hydro

NuclearWind

Major sources of energy for our requirements in India

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.

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.

Is it renewable?Fossil fuels are NOT a renewable energy

resource.Once we've burned them all, there isn't any more, and our consumption of fossil fuels has nearly doubled every 20 years since 1900. This is a particular problem for Oil, because we also use it to make plastics and many other products.