key vocab from chapter 3 AP Campbell Biology (9th edition)
Terms : Hide Images
| 879338414 | polar molecule | overall charge of the molecule is unequally distributed | 0 | |
| 879338415 | cohesion | the intermolecular force, due to hydrogen bonding, that holds together the molecules in liquid water | 1 | |
| 879338416 | adhesion | clinging of one substance to another due to hydrogen bonding | 2 | |
| 879338417 | surface tension | measure of how difficult it is to stretch or break the surface of a liquid | 3 | |
| 879338418 | heat | total amount of kinetic energy due to the random motion of atoms or molecules in a body of matter | 4 | |
| 879338419 | temperature | a measure of the intensity of heat in degrees, reflecting the average kinetic energy of the molecules | 5 | |
| 879338420 | calorie (cal) | unit of heat defined as the quantity of heat required to raise the temperature of 1 gram of water by 1 degree centigrade at atmospheric pressure (one cal equals 4.184 J) | 6 | |
| 879338421 | kilocalorie (kcal) | a unit of heat equal to the amount of heat required to raise the temperature of one kilogram of water by one degree at one atmosphere pressure | 7 | |
| 879338422 | joule (J) | one J equals 0.239 cal | 8 | |
| 879338423 | specific heat | amount of heat that must be absorbed or lost for 1 g of that substance to change its temperature by 1 degree C | 9 | |
| 879338424 | heat of vaporization | quantity of heat a liquid must absorb for 1 g of it to be converted from the liquid to the gaseous state | 10 | |
| 879338425 | evaporative cooling | 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 | 11 | |
| 879338426 | solution | a liquid that is a completely homogeneous mixture of two or more substances | 12 | |
| 879338427 | solvent | a liquid substance capable of dissolving other substances | 13 | |
| 879338428 | solute | the dissolved substance in a solution | 14 | |
| 879338429 | aqueous solution | a solution in which water is the solvent | 15 | |
| 879338430 | hydrophilic | having a strong affinity for water | 16 | |
| 879338431 | colloid | a mixture with properties between those of a solution and fine suspension | 17 | |
| 879338432 | hydrophobic | lacking affinity for water | 18 | |
| 879338433 | molarity | concentration measured by the number of moles of solute per liter of solvent | 19 | |
| 879346071 | pH | (chemistry) p(otential of) H(ydrogen) | 20 | |
| 879346072 | buffer | substance that minimizes changes in the concentration of H+ and OH- in a solution | 21 | |
| 879346073 | ocean acidification | when carbon dioxide dissolves in seawater, it reacts with water to form carbonic acid, which lowers ocean pH | 22 |
