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प्रश्न
Make a list of conventional and non-conventional sources of energy. Give a brief description of harnessing one nonconventional source of energy.
उत्तर
- The conventional sources of energy are : petroleum, coal, fossil fuel, natural gas, etc.
- The non-conventional sources of energy are : geothermal energy, wind energy, hydroelectric energy, ocean energy, solar energy, etc.
- Solar energy : This is the non-conventional source of energy in which solar energy is harnessed in many ways by using devices like solar cell, solar cooker, etc. In solar cooker, it is used to trap the heat energy and cook the food.
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संबंधित प्रश्न
Give the names of two energy sources that you would consider to be exhaustible. Give reasons for your choices.
What is meant by conventional sources of energy? Write the names of two conventional sources of energy.
Fossil fuels are energy rich compounds of an element X which were originally made by the plants with help of sun's energy.
Name the element X.
Which of the following sources of energy are not derived from the sun?
Biomass, Wind, Ocean thermal energy, Geothermal energy, Nuclear fuels, Hydroelectricity, Wave energy, Coal, Petroleum, Tidal energy
The major component of biogas is:
(a) hydrogen
(b) butane
(c) hydrogen sulphide
(d) methane
State whether the following is True or False.
China, the USA, and Spain are major producers of wind energy.
Can you tell?
Why should we save energy?
Exhaustible natural resources are
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.
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)
