HISTORY
WORLD WAR II
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Powerful source of electricity that can light up a city
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Powerful source of nutrients that can supply human beings
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Powerful source of energy that can be made into products like gasoline
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Powerful source of liquid that can give power to animals
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Detailed explanation-1: -Oil is one of the world’s major sources of energy. We depend on it as fuel for heating, transport, and generation of power. For centuries, animal and vegetable oils have been used for cooking and as a source of artificial light. But it is mineral oil which meets most of the world’s needs today.
Detailed explanation-2: -We find the oil layer above the water layer because oil is lightweight and thus floats over it. Also, the density of oil is less than water so it floats on the water surface.
Detailed explanation-3: -We depend most on fossil fuels for many energy uses because fossil fuels can be burnt, shipped and stored. The energy from fossil fuels is both concentrated and portable. Fossil fuel releases tremendous amount of energy on burning. Natural gas provides cleaner burning and coal is available in abundance.