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Bio Cambell7th edch3
Chapter 3 vocab
| Question | Answer |
|---|---|
| polar molecules | unequal distribution of electronsex water~ oxygen patrial negative, hydrogen partial positive |
| cohesion (emergent property of water) | molecules in water are linked by many hydrogen bonds. the hydrogen bonds hold the molecule together. (WATER)cohesion helps water defy gravity in plants (cells carry it from the roots to the leaves) |
| adhesion | water also clings to other things. hydrogen bonds hold the water to cell walls- which carry the water |
| surface tension | a measure of howdifficultitis to stretch or break the surface of a liquid. air water and hydrogen bonds make it look like a film on top of the water |
| moderation of temperature (emergent property of water) | absorbs heat rom warm air, releases heat to cool air |
| kinetic energy | energy of motion |
| heat | form of energy |
| temperature | measure of heat intensity that represents the average kinetic energy of the molecules regardless of volume |
| calorie | the amount of heat it took to raise 1 g of water by 1 degree C. =4.184 joules |
| kilocalorie | heat required to raise the temperature of 1 kg of water by 1 degree c. (cal on food packages actually kilocalories) |
| joule | .239 calories |
| specific heat | amount of heat that must be absorbed or lost for 1g of the substance to change its temperature 1 degree C |
| heat of evaporation |
Created by:
Megan Fitz
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