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प्रश्न
State whether the following is True or False.
China, the USA, and Spain are major producers of wind energy.
पर्याय
True
False
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उत्तर
True
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संबंधित प्रश्न
An examples of a renewable source of energy is:
(a) petrol
(b) natural gas
(c) biogas
(d) kerosene
What are the disadvantages of burning fossil fuels?
Why is LPG considered a good fuel?
Fossil fuels are energy rich compounds of an element X which were originally made by the plants with help of sun's energy.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.
A substance X is added to LPG cylinders while filling so as to make the detection of leakage of LPG from the cylinder easy.
Name the substance X.
The pollution of air caused by burning petroleum fuels (like petrol and diesel) in vehicles can be controlled by fitting a device X in the exhaust system of vehicles.
How does this device help in controlling air pollution?
Write any two advantages of using biogas.
Which of the following is not an example of a biomass energy source?
(a) wood
(b) biogas
(c) atomic energy
(d) cow-dung
When the material A mined from the earth is heated strongly in an insufficient supply of air, it produces a solid fuel B which consists mainly of carbon. When another material C obtained from trees is heated in an insufficient supply of air, it produces another solid fuel D which also consists mainly of carbon. Name A, B, C and D
Which of the two is more energy efficient: filament type electric bulb or CFL? Why?
Select the renewable and non-renewable sources of energy from the following :
- Coal
- Wood
- Water
- Diesel
- Wind
- Oil
Fill in the blank
Coal, petroleum, and natural gas are _________fuels.
Fill in the blank
_______is the coal with the highest percentage of coal.
State whether the following is True or False.
Coal takes millions of years to form.
Can you tell?
Why should we save energy?
Why should we conserve the non-renewable sources of energy?
In a hydro power plant ______.
Why is there a need for harnessing non-conventional sources of energy? How can energy be harnessed from the sea in different ways?
Coal is one of the ______ used to cook food.
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.
