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प्रश्न
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.
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उत्तर
About 300 million years ago, the earth had dense forests in low lying wetland areas. Due to natural processes like floods, these forests got buried under the soil. As more soil deposited over them, they were compressed. The temperature also rose as they sank deeper and deeper. Under high pressure and high temperature, dead plants got slowly converted into coal.
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संबंधित प्रश्न
Classify the following
Coal, Wind, Tides, Petroleum,Wood, Natural gas
What is the basis of above classification?
What is the composition of liquefied petroleum gas (LPG)?
Which of the following is not produced by the burning of fossil fuels?
(a) nitrogen oxides
(b) sulphur oxides
(c) sodium oxides
(d) carbon oxides
Compare the sun and the fossil fuels as the sources of energy.
Name the biomass which is still widely used as a source of heat energy in many household of our country.
The fuel which is not obtained from biomass is:
(a) firewood
(b) cow-dung cakes
(c) coke
(d) charcoal
Why is the use of wood as a fuel not advisable although wood is a renewable source of energy?
State whether the following is True or False.
Coal takes millions of years to form.
Why should we conserve the non-renewable sources of energy?
Write about Renewable resources.
