SOURCES OF ENERGY

Sources of energy:Sources of energy is required to do the work.

Energy can be transformed from

One form to another.

SOLAR ENERGY > CHEMICAL ENERGYPHOTOSYNTHESIS

MUSCULAR ENERGY > SOUND ENERGY

SOUND ENERGY > ELECTRICAL ENERGY

FOSSIL FUEL

Fossil fuel are formed due to dead animals and plants.

Due to the tremendous heat and pressure, Fossil fuels are formed.

Fossil fuel

Solid liquid gaseous

SOLID - COAL1 kg wood = 1700 kilo jocks energy

LIQUID – PETROLFound under 25,000 m below earth bowls.

GASEOUS – METHANE , ETHAVEConvenient to use (portable)

SOLAR ENERGY

Non – conventional source.

Not causes pollution.Easily available and free of cost.

Some devices work by solar energy.

Solar cooker

Solar cells

solar lantern

Solar heater

similar examples of non – conventional sources.

Wind energy

Tidal energy

Hydroelectric energy

BIOGAS

Conventional sources:Are not easily available.Creates danger of global warming.

creates pollution.

conventional sources can cause :

Acid rain

Ultravoilet rays

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Affect crops

Atomic energy:Atomic energy is obtained when uranium atoms are bombared with neutrons.

Some atomic power plantIn india.

BENGAL

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maharashtra

gujrat

REVIEWING THE LESSON

Those substance that gives out energy when the are burn are called fuels.

Coals, mineral oils and natural gas are fossil fuels.

Deposits of fuels are limited.

ThankYou.

Made By : vedant tiwariSTD/DIV: viii/aRoll No: 53School:St. xavier’s high school (kashigaon)