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प्रश्न
Name two sources of energy that you think are renewable. Give reason for your choice.
उत्तर
The following are two sources of energy that are renewable.
a) Wind, which is used to generate energy using wind turbines
b) Water, which is used to generate hydroelectricity from flowing water
They are renewable because they are abundant in nature and can be used again and again..
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संबंधित प्रश्न
Write the full forms of CNG and LPG.
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(a) moon
(b) earth
(c) sun
(d) sea
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(a) coal gas
(b) electricity
(c) oil
(d) charcoal
Why is biogas considered an ideal fuel for domestic use?
Which of the two is more energy efficient: filament type electric bulb or CFL? Why?
The world's known coal reserves are expected to last for about:
(a) 200 years
(b) 400 years
(c) 500 years
(d) 100 years
Name five renewable and three non-renewable sources of energy.
What are fossil fuels?
Complete the crossword in figure with the help of the clues :
Across
1. Fuels obtained from dead remains of living organisms. (6, 5)
2. A process by which the various constituents of petroleum are separated. (8)
3. A porous black substance obtained from coal. (4)
4. Another name for motor fuel. (6)
Down
5. The substance obtained by carbonisation. (4)
6. Fuel for heavy motor vehicles. (6)
7. A petroleum product used for road surfacing. (7)
8. Dead remains of sea animals got converted into it. (9)
