1. SOURCES OF
ENERGY

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

3. Energy can be
transformed from
One form to
another.

4. SOLAR ENERGY > CHEMICAL ENERGY
PHOTOSYNTHESIS

5. MUSCULAR ENERGY > SOUND ENERGY

6. SOUND ENERGY > ELECTRICAL ENERGY

7. FOSSIL FUEL
Fossil fuel are formed
due to dead animals
and plants.

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

9. Fossil fuel
Solid liquid gaseous

10. SOLID - COAL
1 kg wood = 1700 kilo jocks energy

11. LIQUID – PETROL
Found under 25,000 m below earth bowls.

12. GASEOUS – METHANE , ETHAVE
Convenient to use (portable)

13. SOLAR ENERGY
Non – conventional
source.
Not causes pollution.
Easily available and
free of cost.

14. Some devices
work by
solar
energy.

15. Solar cooker

16. Solar cells

17. solar lantern

18. Solar heater

19. similar
examples of non
– conventional
sources.

20. Wind energy

21. Tidal energy

22. Hydroelectric energy

23. BIOGAS

24. Conventional sources:
Are not easily
available.
Creates danger of
global warming.
 creates pollution.

25. conventional
sources can
cause :

26. Acid rain

27. Ultravoilet rays

28. Affect crops

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

30. Some atomic
power plant
In india.

31. BENGAL

32. maharashtra

33. gujrat

34. REVIEWING THE LESSON
Those substance that
gives out energy when
the are burn are called
fuels.

35. Coals, mineral oils
and natural gas are
fossil fuels.

36. Deposits of
fuels are
limited.

37. Thank
You.

38. Made By : vedant tiwari
STD/DIV: viii/a
Roll No: 53
School:
St. xavier’s high school
(kashigaon)