Terms : Hide Images
| 465833334 | Polar Molecule | A molecule in which two ends of the molecule have opposite charges. | |
| 465833335 | Fragile | When water is in its liquid form, its hydrogen bonds are very ___. | |
| 465833336 | Cohesion | The intermolecular force that holds together the molecules in a solid or liquid; for example, oxygen and hydrogen molecules in water. | |
| 465833337 | Adhesion | The clinging of one substance to another; for example, water to cell walls (by the force of hydrogen bonds). | |
| 465833338 | Surface Tension | A measure of how difficult it is to stretch or break the surface of a liquid. Ex.) Water has a greater surface tension that most other liquids because of the hydrogen-bonded water molecules on and below the surface. | |
| 465833339 | True | True or false: water moderates air temperature by absorbing heat from air that is warmer and releasing the stored heat to air that is cooler. | |
| 465833340 | Kinetic Energy | The energy of motion. | |
| 465833341 | Heat | A measure of a matter's total kinetic energy due to motion of it's molecules (including the matter's volume). | |
| 465833342 | Temperature | A measure of a matter's heat intensity, which represents the average kinetic energy of the molecules regardless of volume. | |
| 465833343 | False | True or false: there is more heat AND a hotter temperature in a cup of coffee than in a swimming pool. | |
| 465833344 | B | A or B: With two objects (one hot, one cold) - A.) The colder one gives off coolness to the warmer one. B.) The warmer one gives off heat to the cooler one. | |
| 465833345 | A | A or B: With the Celsius scale.. A.) Average human body temperature measures to 37 degrees; room temperature about 20 degrees. B.) Average human body temperature about 100 degrees; room temperature about 0 degrees. | |
| 465833346 | Calorie | A unit of heat; The amount of heat it takes to raise the temperature of 1 gram of water by 1 degree Celsius. | |
| 465833347 | Kilocalorie | A unit of heat; The amount of heat it takes to raise the temperature of 1 kilogram of water by 1 degree Celsius. | |
| 465833348 | Joule | A unit of energy; 1 X = .239 calories; 1 calorie = 4.184 X. | |
| 465833349 | Specific Heat | The amount of heat that must be absorbed or lost for one gram of that substance to change its temperature by one degree Celsius. | |
| 465833350 | Heat of Vaporization | The quantity of heat a liquid must absorb for one gram of it to be converted from the liquid to the gaseous state. | |
| 465833351 | Evaporative Cooling | The cooling of a surface of liquid that occurs as liquid evaporates. | |
| 465833352 | Expand | Water will ____ when it solidifies. | |
| 465833353 | Contract | Water will not ____ when it solidifies, as opposed to other liquids. | |
| 465833354 | Yes | Yes or No: when water reaches one degree, water molecules are locked into a set of four partners of hydrogen bonds that keep the molecules at "arm's length", far enough to make ice about 10% less dense - now at four degrees. | |
| 466078659 | Solution | A liquid that is a completely homogeneous mixture of two or more substances. | |
| 466078660 | Solvent | A dissolving agent of a solution | |
| 466078661 | Solute | A substance being dissolved into a dissolving agent | |
| 466078662 | Aqueous Solution | A solution in which the solvent is water. | |
| 466078663 | Hydration Shell | The sphere of water molecules around a dissolved ion. | |
| 466078664 | Hydrophilic | Having a strong affinity or attraction to water. (polar!) | |
| 466078665 | Hydrophobic | Lacking affinity for water; no attraction/"dislike" for water. (nonpolar!) | |
| 466078666 | Colloid | A stable suspension of fine particles in a liquid. | |
| 466078667 | Molecular Mass | The sum of the masses of all the atoms in a molecule. | |
| 466078668 | Mole | The molecular weight of a substance expressed in grams. | |
| 466078669 | Molarity | The number of moles of solute per liter of solution. | |
| 466078670 | Acid | A substance that increases the hydrogen ion concentration of a solution (H+) and lowers the hydroxide concentration. | |
| 466078671 | Base | A substance that increases the hydroxide ion concentration of a solution. (OH-) | |
| 466078672 | Hydrogen Ion | A single proton with a charge of 1+ (H+). | |
| 466078673 | Hydroxide Ion | An ion with a charge of -1. (OH-) | |
| 466078674 | Hydronium Ion | A hydrogen ion that combines with a water molecule to form H3O(+), leaving a hydroxide ion behind. | |
| 466078675 | 10 (-14) | The balanced "product" of hydrogen and hydroxide ions in aqueous solutions. [H+][OH-] = .... | |
| 466078676 | 1,000 | A solution of pH 3 is not twice as acidic as a solution of pH 6, but a ____ times more acidic. | |
| 466078677 | Buffers | Substances that minimize changes in the concentrations of H+ and OH- in a solution; done by either absorbing or donating hydrogen ions to the solution depending on the concentration. Example: Carbonic Acid-Bicarbonate (consists of an acid and a base in equilibrium) | |
| 466078678 | Acid Precipitation | Rain, snow, or fog with a pH lower than 5.2 (more acidic). |
