Chapter 4 Energy

Chapter 4 Energy - Chapter 4 Energy(124-129;143-153 4.1 Cars that run on french fry oil Organisms and machines need energy to work Biofuels Fuels

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Chapter 4 Energy (124-129;143-153) 4.1 Cars that run on french fry oil? Organisms and machines need energy to work Biofuels : Fuels produced from plant and animal products Fossi fuels : Gasoline - Fuels are produced from the decayed remains of ancient plants and animals modified through the years by heat, pressure, and bacterial pressure - Fuels are also chemically similar - All contain chains of carbon and hydrogen atoms abound together, and breaking bonds releases large amounts of energy - Biofuels are renewable resource - All life depends on capturing energy from the sun and converting it into a form that living organisms can use - Energy capture and conversion occurs in 2 processes - 1. Photosynthesis : Plants capture energy from the sun and store it in the chemical bonds of sugars and other food molecules they make - 2. Cellular Respiration: All living organisms release the energy stored in the chemical bonds of food molecules and use it to fuel their lives 4.2 Energy has two forms: kinetic and potential - Energy : The capacity to do work - Energy encountered in the study of living things…. 1.Kinetic 2. Potential - Kinetic Energy : The energy of moving objects - Heat, another form of kinetic energy, comes from the heat-energy particles - Light, another form of kinetic energy, the most important form - Objects do not have to be moving to have the capacity to do work - Potential Energy : Stored energy or the capacity to do work that results from an object’s location or position Chemical Energy : The storage of energy in chemical bonds, another type of potential energy - Ex: Food - Potential energy is less obvious because it doesn’t involve movement 4.3 As energy is capture and converted, the amount of energy available
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to do work decreases - Organisms on earth cannot capture every single bit of energy released by the sun - Most plants capture about 1% - Space 30% - Absorbed by land, oceans, atmosphere 70%, and transformed into heat - All energy captured from the sun is capture and transformed into usable chemical energy by organisms through photosynthesis - Energy can change form but never disappear is important feature of energy in the universe! - Energy can never be created. Therefore, we are just transforming energy.
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This note was uploaded on 12/12/2011 for the course BIO 111 taught by Professor Goschke during the Spring '07 term at Cal Poly.

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Chapter 4 Energy - Chapter 4 Energy(124-129;143-153 4.1 Cars that run on french fry oil Organisms and machines need energy to work Biofuels Fuels

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