101 molecules, such as carbohydrates, proteins, and fat. When a moose walks, it
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101 molecules, such as carbohydrates, proteins, and fat. When a moose walks, it converts chemical energy into a type of kinetic energy 61 cells and the Flow of Energy called mechanical enerzy dig 6 ng outcomes ron completion of this section, you should be able to Two Laws of Thermodynamics compare potential and kinetic energy. nature, energy nows in biological systems. Figure 6.1 illustrates the flow of energy in a terrestrial ecosystem. Plants capture only Describe the first and second laws of thermodynamics. Examine how the organization and structure of living a small portion of solar energy, and much of it dissipates as heat. When plants and then make use of the food they organisms are related to heat and entropy produce, more heat results. Even with this considerable heat loss. maintain their structural organization and carry out metabolic there is enough remaining to sustain a moose and the other organ ecosystem. metabolize nutrient molecules. activities. cells--and organisms comprised of cells need a con eventually dissipates as heat. There- tant supply of energy. Enerzy is defined as the ability to do all the captured solar energy ecosystem and does .erk erbring about a change. The general characteristics of life. fore, we can see that energy flows through the including growth development. metabolism, and reproduction, all not cycle within it formulated by early energy Two laws of thermodynamics, organic nutrients, made by photosynthesizing producers researchers, explain why energy flows through ecosystems and algae, plants and some bacteria), directly provide organisms with through cells energy by capturing energy from sunlight. Considering that pro- The first law of thermodynamics-the law of conservation of ducers use light energy to produce organic nutrients, the majority energy-states that energy cannot be created or destroyed. but it of life on Earth is ultimately dependent on solar energy. can be changed from one form to another. Forms of Energy Energy occur in two forms: kinetic and potential energy. Kinetic when leaf cells photosynthesize, they use solar energy to form er a waterfall. carbohydrate molecules from carbon dioxide gas and water. Car- energy is the energy of motion, as when water a ball rolls down a hill, or a moose walks through bohydrates are energy-rich molecules, because they have many grass. Potential energy is stored energy bonds that store energy carbon dioxide and water are energy-poor whose capacity to accomplish work is not molecules, because of the relative lack of bonds. Not all of the The food we eat captured solar energy becomes carbohydrates: has potential energy, because the energy stored in chemical bonds can types of kinetic energy. Food is a form of potential energy called chemical composed of organic solar energy Mechanical energyExplanation / Answer
All the cells require energy to maintain the structure and metabolic functions. Energy is defined as the ability to do work or bring about change.
Forms of energy: Energy occurs in two forms - kinetic energy and potential energy. Kinetic energy is the energy of motion, as when water flows from a water fall. Potential energy is stored energy whose capacity to accomplish work is not being used at the moment.
Eg: the food we eat has the potential energy, because the energy stored in chemical bonds like carbohydrates, protein and fat can be converted into various types of kinetic energy.
Two laws of thermodynamics:
Eg: the plant cells captures energy from solar light and the energy convert into carbohydrate and other molecules.
2. The second law state that energy cannot be changed from one form to another without loss of usable energy. No process requiring a conversion of energy is over 100% efficient. Much of the energy is loss in the form of heat.
Cells and Entropy:
The entropy is used to indicate the relative amount of disorganization. Because the process that occurs in the cells are energy transformations means that each cellular process makes less energy available to do useful work in the future.
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