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عبدالله المالكي الإثنين أبريل 06, 2009 10:47 pmHow Energy is Made
Light from the sun contains a vast amount of energy that, if tapped into, has a great deal of power to be obtained. From the very beginning plants have used the sun to create energy. Animals such as reptiles use it to maintain their body temperature. We humans have only recently begun to explore the potentials of one of the most valuable resources available to: the sun.
Plants use light to make their own food. Plants are also known as autotrophs, which means they are able to make their food from the light of the sun. They make their food through a process called photosynthesis. Through photosynthesis, plants are able to take the energy from the sun's rays and turn it into a type of energy that they are able to use. All green plants use this method. Some bacteria are also known to use photosynthesis. The chemical formula for photosynthesis is:
6CO2 + 12H2O + light à C6H12O6 + 6O2
Plants use carbon dioxide, water, and light and turn it into glucose, a form of sugar, and oxygen. This process takes place in the plant cell's chloroplasts, which contain a pigment called chlorophyll that absorbs the sun's rays. The oxygen is given off and the glucose given to the cell's mitochondria to be put to use.
Humans make energy from light with solar thermal plants. These stations use solar heat to boil water. The steam that the water gives off is used to turn generators, which then create electricity. During the times where the sun is hidden by clouds or during the night, natural gas is used instead to heat the water. Solar thermal plants cost a lot to build, but they are the main source of solar power in the United States. However, perhaps one of the best ways to create solar power are photovoltaic cells.
Photovoltaic cells do not give off heat, noise, or pollution and don't require moving parts, magnets, coils of wire, steam, pipes, pumps, or turbines. These cells are made from thin slices of crystalline silicon, gallium arsenide, and other semiconductor materials. Electricity is created when light excites the electrons of the semiconductor materials, causing them to move quickly between the different layers. The electricity is passed on to a power conditioner and then on to a transmission tower.
Light from the sun contains a vast amount of energy that, if tapped into, has a great deal of power to be obtained. From the very beginning plants have used the sun to create energy. Animals such as reptiles use it to maintain their body temperature. We humans have only recently begun to explore the potentials of one of the most valuable resources available to: the sun.
Plants use light to make their own food. Plants are also known as autotrophs, which means they are able to make their food from the light of the sun. They make their food through a process called photosynthesis. Through photosynthesis, plants are able to take the energy from the sun's rays and turn it into a type of energy that they are able to use. All green plants use this method. Some bacteria are also known to use photosynthesis. The chemical formula for photosynthesis is:
6CO2 + 12H2O + light à C6H12O6 + 6O2
Plants use carbon dioxide, water, and light and turn it into glucose, a form of sugar, and oxygen. This process takes place in the plant cell's chloroplasts, which contain a pigment called chlorophyll that absorbs the sun's rays. The oxygen is given off and the glucose given to the cell's mitochondria to be put to use.
Humans make energy from light with solar thermal plants. These stations use solar heat to boil water. The steam that the water gives off is used to turn generators, which then create electricity. During the times where the sun is hidden by clouds or during the night, natural gas is used instead to heat the water. Solar thermal plants cost a lot to build, but they are the main source of solar power in the United States. However, perhaps one of the best ways to create solar power are photovoltaic cells.
Photovoltaic cells do not give off heat, noise, or pollution and don't require moving parts, magnets, coils of wire, steam, pipes, pumps, or turbines. These cells are made from thin slices of crystalline silicon, gallium arsenide, and other semiconductor materials. Electricity is created when light excites the electrons of the semiconductor materials, causing them to move quickly between the different layers. The electricity is passed on to a power conditioner and then on to a transmission tower.
