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Ch03 Campbell Biology, 9th ed. Flashcards

Mr. Ide's AP Biology study group for the 2011-2012 school year.

Terms : Hide Images
380617293A substance that increases the hydrogen ion concentration of a solution.Acid
380617294A substance that reduces the hydrogen ion concentration of a solution.Base
380617295A solution that contains a weak acid and its corresponding base. A buffer minimizes changes in pH when acids or bases are added to the solution.Buffer
380617296The amount of heat energy required to raise the temperature of 1 g of water by 1°C; also the amount of heat energy that 1 g of water releases when it cools by 1°C. The Calorie (with a capital C), usually used to indicate the energy content of food, is a kilocalorie.Calorie (cal)
380617297A temperature scale (°C) equal to 5/9(°F - 32) that measures the freezing point of water at 0°C and the boiling point of water at 100°C.Celsius scale
380617298The linking together of like molecules, often by hydrogen bonds.Cohesion
380617299A mixture made up of a liquid and particles that (because of their large size) remain suspended rather than dissolved in that liquid.Colloid
380617300The process in which the surface of an object becomes cooler during evaporation, a result of the molecules with the greatest kinetic energy changing from the liquid to the gaseous state.Evaporative cooling
380617301The total amount of kinetic energy due to the random motion of atoms or molecules in a body of matter; also called thermal energy. Heat is energy in its most random form.Heat
380617302A unit of energy: 1 J = 0.239 cal; 1 cal = 4.184 J.Joule (J)
380617303The energy associated with the relative motion of objects. Moving matter can perform work by imparting motion to other matter.Kinetic energy
380617304A common measure of solute concentration, referring to the number of moles of solute per liter of solution.Molarity
380617305The number of grams of a substance that equals its molecular weight in daltons and contains Avogadro's number of molecules.Mole (mol)
380617306The sum of the masses of all the atoms in a molecule; sometimes called molecular weight.Molecular mass
380617307Decreasing pH of ocean waters due to absorption of excess atmospheric CO2 from the burning of fossil fuels.Ocean acidification
380617308A covalent bond between atoms that differ in electronegativity. The shared electrons are pulled closer to the more electronegative atom, making it slightly negative and the other atom slightly positive.Polar covalent bond
380617309A substance that is dissolved in a solution.Solute
380617310A liquid that is a homogeneous mixture of two or more substances.Solution
380617311The dissolving agent of a solution. Water is the most versatile solvent known.Solvent
380617312The amount of heat that must be absorbed or lost for 1 g of a substance to change its temperature by 1°C.Specific heat
380617313A measure of how difficult it is to stretch or break the surface of a liquid. Water has a high surface tension because of the hydrogen bonding of surface molecules.Surface tension
380617314A measure of the intensity of heat in degrees, reflecting the average kinetic energy of the molecules.Temperature

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