ppt

2. HOW WILL YOU
DEFINE
ENERGY?
• Energy is the capacity to do
work and is required% for life
processes.
• Anenergyresourceissomethi
ngthat
canproduceheat,powerlife,m
ove

3. • Solar energy from the sun is
converted into chemical
energy by plants.
• Consumers like humans can
transform chemical energy
from plants into mechanical
energy as they work.

4. •Energy is derived
from nuclear, fossil
fuels, geothermal,
hydro, wind, solar,
and biomass.

5. HOWENERGYISHARNE
S E D
FROMDIFERENTSOUR
CES

6. Thearemanysourcesofenergy.
Infact
energyiseverywhereintheunive
rse.
Lightningandthunderstormsaren
atures’
demonstrationofthepresenceofe
nergy.

7. FOSSIL FUE
LS
• Arecombustiblematerialsthat
ok
milionsofyearstoformunderne
aththe
earth.Theyarealsocaledconve
nience f u e l .
• Thefuelsthatbelongtothiscat

10. BIOGA
S
• Biogasisproducedbytheanaerobic
decompositionoforganicmaterials
brought
aboutbycertainvarietiesofbacteri
a.
• Itisacombustiblegasconsistingm
ostlyof
inflammablehydrocarbongascaled

12. GEOTHERM
AL
•Geothermalenergyi
sthe
heatobtainedfrom
underneaththeearth
and
cariedtothesurfac

14. HYDROTHERM
AL
•Movingwateris
a
sourceofenerg
y.
Movingandfalin

16. BATERI
ES
• Voltaicelsundergo
electrochemicalprocese
sto
produceelectricalenergy
.
Voltaicelsincludedryc
els,

18. A. DRY CE
L
•
• Is a voltaic e l in which the
electrolytesisapaste.Inon
etype
ofdrycel,thezincontaine
ris
filedwithathick,moistelectr
olyte

20. B.ALEADSTORAGEBAT
ERY
•Is usua ly used in ca
rs.
Thisisagroupof
voltaicelsconect
ed together.

22. C. FUEL CE
L
• Isadevicethatconvertst
he
chemical energy from fuel
into electricity.
• Fuelcelsrequireacontin
uous
suplyofuelandoxygen

23. • Afuelcellworksbypasing
hydrogenthroughtheano
deof
afuelcellandoxygenthrou
gh
thecathode.Atheanodes
ite,

24. SOLAR CEL
S
• Solarcelsarephotovoltaicc
els
usualyusedforpoweringho
mes.
• Solarenergyisuseddirectlyfr
omthe s u n .
• Solarenergysystemsofsolarc
els

26. BIOMAS
S
• Biomas is formed from plant
s and animalmaterials.
• Firewo d is the traditional for
m of b i o m a s .
• Thebiomasofwod,inthisca
se,is
burneddirectlytoprovideheat
and energy.

27. S