Renewable Energy — Flashcards

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Energy is the capacity to do work. It exists in forms such as heat energy, light energy, electrical energy, chemical energy, and mechanical energy.

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The chemical energy of coal is converted into electrical energy. Coal is burnt, heat produces steam, and the steam rotates turbines to generate electricity.

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The chemical energy of fuel is converted into mechanical energy. The fuel burns in the engine and helps the vehicle move.

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Conventional sources of energy are sources that have been traditionally used by humans for a long time to meet energy needs. They are non-renewable resources.

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Coal, petroleum, and natural gas are the major conventional sources of energy. They are collectively known as fossil fuels.

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Their rate of consumption is much higher than their rate of formation. They take millions of years to form, so they cannot be replaced quickly once used.

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Coal is a solid fossil fuel formed from the remains of plants buried under layers of soil and rock millions of years ago. It is mainly used in thermal power plants and as raw material in iron and stee…

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Petroleum is a liquid fossil fuel found deep beneath the Earth's surface. It is drilled out and refined into petrol, diesel, kerosene, and LPG.