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प्रश्न
Choose the correct answer.
Windmills have been used for many centuries in
विकल्प
the USA
the Netherlands
Russia
India
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उत्तर
Windmills have been used for many centuries in the Netherlands
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संबंधित प्रश्न
What are the disadvantages of fossil fuels?
State any four characteristics of a good source of energy.
What is the difference between a renewable and a non-renewable source of energy? Explain with examples.
An examples of a renewable source of energy is:
(a) petrol
(b) natural gas
(c) biogas
(d) kerosene
Write a short note on the pollution caused by burning fossil fuels.
The aviation fuel which is used in the engines of jet aeroplanes is:
(a) diesel
(b) kerosene
(c) petrol
(d) CNG
Which of the following is not a fossil source of energy?
(a) kerosene oil
(b) cow-dung cakes
(c) CNG
(d) coal
What is biomass? Give three examples of biomass.
Write any two advantages of using biogas.
The constituent of biogas which makes it an excellent fuel is:
(a) butane
(b) methane
(c) propane
(d) ethane
An energy efficient devices for producing light is:
(a) DLF
(b) CFL
(c) FCL
(d) LPG
Name a few major producers of petroleum in the world.
Can you tell?
What is ‘green energy’?
Who is the odd one out?
What is non-renewable resources?
Make a list of conventional and non-conventional sources of energy. Give a brief description of harnessing one nonconventional source of energy.
Why is there a need for harnessing non-conventional sources of energy? How can energy be harnessed from the sea in different ways?
Fill in the blanks and complete the story.
About 300 million years ago, the earth had dense ______ in low lying wetland areas. Due to natural processes like ______, these forests got buried under the ______. As more ______ deposited over them, they were compressed. The ______ also rose as they sank deeper and deeper. Under high ______ and high ______, dead plants got slowly converted into coal.
Imagine that all the exhaustible natural resources are exhausted by human activities. Do you think survival of living beings would be possible? If yes, why? If not, why not?
