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homeostasis the maintenance of a stable internal environment http://o.quizlet.com/XI8DDo1RYlkwFadXoQoUpg.jpg calories Units of heat that measure the energy available in foods http://o.quizlet.com/eDZbhx10CTdH6OUTrY0iEg.jpg massing adding or losing energy through gaining mass or losing mass http://o.quizlet.com/bMouCpS8.smdkrNgzu22jg.jpg heating adding or losing energy through conduction,radiation or convection http://o.quizlet.com/tDrBK2Z0EyxTcY1CtQ73sA.jpg radiating adding or losing energy through light or sound http://o.quizlet.com/vJWP8BX6kyFGHx3e2RJ7Cg.jpg working adding or losing energy by a force applied in a direction of motion closed system no energy enters or leaves the system E total= E kinetic + E potenital Law of Conservation of Energy energy cannot be created nor destroyed internal energy sum of all kinetic and potential energy contained by the article (atoms, molecules etc) in a system internal kinetic energy energy stored by the movement of particles (atoms, molecules etc) in a substance. Measured by the temperature of a substance. internal potential energy energy stored due to the position of the atoms in a substance; chemical energy of a substance carbohydrates energy rich organic compounds made up of the elements carbon, hydrogen and oxygen ex. sugars, starches, grains http://o.quizlet.com/Zu4.KMG26puj8mRaPzk.dA.jpg lipids energy-rich organic compounds, such as fats, oils, and waxes, that are made of carbon, hydrogen, and oxygen http://o.quizlet.com/yxoj7x2BnJ3Jb9TdN6OYqQ.jpg proteins large molecules that contain nitrogen as well as carbon, hydrogen, and oxygen; needed by tissue for repair and growth. made up of 20 amino acids. http://o.quizlet.com/fTq1U4ZzXS1cxRmXpjt4Xg.jpg nucleic acids complex macromolecules that store and transmit genetic information organic referring to or derived from living organisms. In chemistry, any compound containing carbon. monomer small molecular unit that is the building block of a larger molecule http://o.quizlet.com/MxiRZU6vcFeCxvjmxnqP9Q.jpg polymer large molecule formed when many smaller molecules bond together http://o.quizlet.com/MxiRZU6vcFeCxvjmxnqP9Q.jpg