Thai
Sikh International School
Year
8 , Geo Notes[6.5 Energy Fuel and
Electricity]
1. Write a note on Corfe Castle
village, in Dorset.
Corfe Castle village is less than
5km from the south coast of UK. The Castle itself was built by the Normans. It
once belonged to Henry VIII. But his daughter Elizabeth I sold it. Now it is in
ruins.
2.
What
is the advantage of using wind turbines?
Wind turbines don’t burn fuels. So
no carbon-dioxide.
3. Why
do people often object to wind farms?
People often object to wind farms
because they think that will disturb wild life, or be too noisy or spoil a
lovely view.
4.
How
large are Turbo winds?
The turbo wind turbines are120m
tall, from base to wing tip, or 15 times as high as two storey house.
6.6 [ Are bio fuels the answer?]
5.
What
are bio fuels? Give an example for it.
Bio fuels are liquids made from
plant material, to use as fuels for vehicles. Ethanol is an example.
6.
Explain
how Ethanol is prepared from corn, in USA.
At the bio fuel plant, the corn kernels
are grounded up. Water and enzymes are added. The enzymes turn the corn starch
into Ethanol. The ethanol is distilled off and mixed with petrol.
7.
Ethanol
business in Mexico has led to a rise in meat prices. How?
Earlier farmers used to grow corn
for food and feeding cattle. But now many farmers have switched to corn from other
crops, because they can earn more for corn, for ethanol. So the price of many
foods is rising, especially meat prices.
6.7 [Solar power a winner?]
8.
What
is a PV cell? Give its full name and say what it does?
PV cell is an instrument used to
produce current from sun light. Its full name is Photo Voltaic Cell. When
sunlight strikes a PV cell, a current is produced.
9.
What
are the main advantages of solar power? List them in order of importance.
Ø In
PV cell, no fuel is burned- so no carbon-dioxide.
Ø At
first they cost a lot- but now they are getting cheaper.
Ø We
can store up the electricity from PV cell in a big battery, to use it later.
Ø Every
home can make its own electricity.
10. Is there any disadvantage of using
PV cells?
It can be used in places and
countries where there is more sunlight.
6.8 [Going Solar in Gosaba.]
11. Where is Gosaba?
Gosaba is a small island in an area
called Sunder bans, in India.
12. Explain why there are so many
islands in Sunder bans?
Sunder bans is a delta area. It has
102 islands. The water flowing out from two great rivers, the Ganges and
Brahmaputra, deposited sediments in the area over millions of years. It built
up to form the islands- and the water just ran around them.
13. What problems kerosene can cause
when it is used for lighting and cooking?
Kerosene is made from oil. It gives
out soot that turns wall and ceilings black, and fumes that irritate our eyes
and lungs. It gives a dim light. It can also set the house on fire.
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