September 20-ch6

September 20-ch6 - September 20, 2007 Chapter 6 Energy flow...

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September 20, 2007 Chapter 6 Energy flow through cells Energy o The capacity to do work Work o A force acting on an object that causes the object to move Chemical energy: is the energy that powers life o The objects that move are electrons, which reposition during chemical processes Fundamental types of energy o Kinetic energy is the energy of movement o Potential energy is stored energy The laws of thermodynamics o First law o Energy can neither be created nor destroyed o “the law of conservation of energy” o The total amount of energy within a give system remains constant unless energy is added or removed o Second law o The amount of usefull energy decreases when energy is converted from one form to another Entropy increases More complex to less complex o Living things have to gain energy to counteract entropy Energy of sunlight o Photosynthetic organisms use external solar energy to maintain orderly structure o Non-photosynthetic organism use stored chemical energy in other living
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This note was uploaded on 04/10/2008 for the course BIOLOGY 101 taught by Professor Beitch during the Spring '07 term at Quinnipiac.

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September 20-ch6 - September 20, 2007 Chapter 6 Energy flow...

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