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प्रश्न
Fill in the blank
_______is the coal with the highest percentage of coal.
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उत्तर
Anthracite is coal with the highest percentage of coal.
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संबंधित प्रश्न
Why are fossil fuels classified as non-renewable source of energy?
Which gaseous fuel is being used increasingly in transport vehicles like cars and buses these days?
What is the main constituent of:
(1) petroleum gas?
(2) natural gas?
Explain why, natural gas is considered to be a good fuel.
Which fossil fuels were formed by the buried remains of small plants and animals?
The aviation fuel which is used in the engines of jet aeroplanes is:
(a) diesel
(b) kerosene
(c) petrol
(d) CNG
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.
Compare the sun and the fossil fuels as the sources of energy.
Fill in the following blank with suitable word:
Biomass is another form in which ........... energy manifests itself.
Suggest a safe and efficient method for the disposal of biowastes and sewage materials. How is this method advantageous to us?
Write any two advantages of using biogas.
The non-renewable source of energy among the following is:
(a) hydroelectricity
(b) sewage gas
(c) natural gas
(d) gobar gas
The gravitational pull of the moon cause the sea-water to rise periodically.
(a) What name is given to the condition of the sea when water to rise periodically.
(b) What name is given to the condition of the sea when its raised water recedes?
(c) What name is given to the energy which can be harnessed from this natural phenomenon?
(d) Draw labelled diagram to show how this energy can be harnessed from this natural
The source of energy of the sun is:
(a) conversion of hydrogen gas into helium
(b) conversion of carbon fuel into carbon dioxide
(c) burning of hydrogen gas present in the sun
(d) disintegration of uranium into barium and krypton
What is meant by the renewable and non-renewable sources of energy? State two differences between them, giving two examples of each
Fill in the blank
__________ are examples of renewable energy resources.
State whether the following is True or False.
China, the USA, and Spain are major producers of wind energy.
Which of the following is a non-renewable source of energy?
Which of the following is a pair of exhaustible natural resources?
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.
