The ultimate source of energy in the food chain is the sun.
1. Solar energy input
In the food chain, solar energy enters the ecosystem through photosynthesis and is absorbed by plants. Photosynthesis is the process by which plants use solar energy to convert carbon dioxide and water into organic matter such as glucose. In this way, solar energy becomes the main source of energy for all organisms in the food chain.
2. Energy Conversion in Plants
Plants convert solar energy into chemical energy through photosynthesis and store it in organic matter. The light energy conversion efficiency of plants is generally low, and only a small part of solar energy is converted into chemical energy and stored in the organic matter of the plant body. ThisOrganic matter includes the roots, stems, leaves, and fruits of plants, which provide energy to other living things.
3. Energy transfer and the food chain
From plants, energy is transferred between organisms through the food chain. When plants are eaten by herbivores, the energy is transferred to the herbivores; carnivores then obtain energy by preying on herbivores. In this way, energy is transferred from one organism to another, gradually passing through the different levels of the food chain.
4. Energy loss and efficiency
In the food chain, energy will be gradually lost as energy is transferred. Metabolic activities, movements and other vital processes of the organism itself all require energy consumption, some of which is lost to the environment.nment in the form of thermal energy. As a result, organisms at each level of the food chain receive less energy than at the previous level and the efficiency of energy conversion decreases accordingly.
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Energy flow in the food chain is the basic process of conversion and transfer of energy in the ecosystem. In addition to solar energy, there are also energy sources suitable for particular circumstances. For example, some organisms can use chemical energy to convert it into a biological energy source, a phenomenon known as chemosynthesis.
In addition, in some marine ecosystems, there are also biological chains that use deep-sea bacteria in hydrothermal vents to obtain energy from geothermal energy through chemical synthesis. However, overall, solar energyre remains the primary source of biological survival and energy conversion on Earth. Various organisms rely on solar energy to meet their needs throughout their life cycle through the flow of energy through the food chain.
According to the classification of energy production, it can be divided into primary energy and secondary energy. Among them, electrical energy is a secondary energy source; Both nuclear energy and solar energy are primary energy sources. That is to say, electrical energy is an energy product that must be converted from the processing of primary energy. Primary energy can be obtained directly from nature.
Depending on the nature of energy,it can be divided into combustible energy and non-combustible energy. Where electrical energy can be either a fuel-based energy source or an energy sourceenergy without fuel (depending on how it is produced). Both nuclear energy and solar energy are non-combustible energy sources.
According to the classification of energy pollution, it can be divided into polluting energy and clean energy. Electric energy can be either clean or polluting (depending on how it is produced). Both nuclear power and solar power are clean energy sources.
Conversion between energy production:
1. Different forms of energy can be converted into each other. Among the primary energy sources, wind, water, ocean currents and waves are based. Mechanical energy (kinetic energy and potential energy) is supplied in the form and can be converted into energy or electricity using various wind (such as wind turbines) and hydraulic (such as turbines) machines.hydraulic bins).
2. Conventional energy sources such as coal, oil and natural gas generally convert chemical energy of combustion into thermal energy through combustion.
3. Thermal energy can be used directly, but a large part of thermal energy is converted into electricity through various types of thermal machines (such as internal combustion engines, steam turbines and gas turbines, etc.) operate various types of machinery and transportation tools on the job; or drive a generator to send electricity to meet the needs of people's lives and industrial and agricultural production.
4. The energy required for electricity generation and transportation represents a large proportion of total energy consumption. Energy demand for electricity generation alone is expected to account for more than 40% of energy development.e primary school by the end of the 20th century. The higher the proportion of primary energy converted into electricity, the higher the degree of electrification, the more advanced productivity and the higher the standard of living.
Reference for the content above? Baidu Encyclopedia-Energy