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AP Biology

Chapters 3 and 4-Water and the Fitness of the Enviroment

QuestionAnswer
cohesion The binding together of like molecules, often by hydrogen bonds.
calorie The 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 k
solution A liquid that is a homogeneous mixture of two or more substances.
solvent The dissolving agent of a solution. Water is the most versatile solvent known.
solute The dissolving agent of a solution. Water is the most versatile solvent known.
hydrophilic Having an affinity for water.
hydrophobic Having an aversion to water; tending to coalesce and form droplets in water.
molecular weight The sum of the masses of all the atoms in a molecule; sometimes called molecular weight.
hydrogen ion A single proton with a charge of +1. The dissociation of a water molecule (H2O) leads to the generation of a hydroxide ion (OH-) and a hydrogen ion (H+).
hydroxide ion A water molecule that has lost a proton
acid A substance that increases the hydrogen ion concentration of a solution.
base A substance that reduces the hydrogen ion concentration of a solution.
hydrocarbon An organic molecule consisting only of carbon and hydrogen.
functional group A specific configuration of atoms commonly attached to the carbon skeletons of organic molecules and usually involved in chemical reactions.
isomer One of several organic compounds with the same molecular formula but different structures and therefore different properties. The three types of isomers are structural isomers, geometric isomers, and enantiomers.
adhesion The attraction between different kinds of molecules.
Created by: swimifishi
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