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प्रश्न
Name five renewable and three non-renewable sources of energy.
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उत्तर
Renewable:
- Sun
- Wind
- Flowing water
- Tides
- Nuclear fuel
Non-renewable:
- Coal
- Petroleum
- Natural gas
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संबंधित प्रश्न
Which fossil fuels were formed by the buried remains of small plants and animals?
The product of petroleum used to drive heavy vehicles like trucks is:
(a) petrol
(b) kerosene
(c) diesel
(d) carbon oxide
The ultimate source of energy stored in fossil fuels is:
(a) moon
(b) earth
(c) sun
(d) sea
Coal cannot be converted into one of the following forms of energy. This is:
(a) coal gas
(b) electricity
(c) oil
(d) charcoal
What should be the minimum wind speed for the satisfactory working of a wind-powered electric generator?
Suggest a safe and efficient method for the disposal of biowastes and sewage materials. How is this method advantageous to us?
Can you tell?
Why should we save energy?
Write True/False against the following statement.
Resources which are present in unlimited quantity in nature are called exhaustible natural resources.
Match the items given in Column I with the items of Column II.
| Column I | Column II |
| (a) Used for road surfacing | (i) Black gold |
| (b) Natural gas | (ii) Vaseline and candles |
| (c) Petroleum | (iii) Bitumen |
| (d) Paraffin wax | (iv) CNG |
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)
