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AP BIO CH. 3: WATER AND THE FITNESS OF THE ENVIRONMENT Flashcards

Mr. Howell AP BIO class.
Vanden High School.

Terms : Hide Images
1657522094Polar MoleculeOpposite ends with opposite charges0
1657522095Why is water considered polar?The oxygen have a negative charge and hydrogen has a positive charge.1
1657522096Hydrogen BondingThe slightly positive hydrogen is attracted to the slightly negative oxygen of a nearby molecule.2
1657522097How many hydrogen bonds can a single water molecule form?Four.3
1657522098CohesionThe tight structure of molecules4
1657522099AdhesionThe clinging of one substance to another5
1657522100Demonstrated when you see beads of water on a waxed car hood.Adhesion6
1657522101Property explaining the ability of a water strider to walk on water.High surface tension of water.7
1657522102caloriethe amount of heat it takes to raise the temperature of 1 gram of water by 1 degree Celsius8
1657522103What does it mean that water has "high specific heat"?It will change its temperature less when it absorbs/loses heat.9
1657522104How hydrogen bonding contributes to water's high specific heatThe heat is used to disrupt hydrogen bonds before the water molecules can begin to move faster.10
1657522105How does water's high specific heat contribute to the moderation of temperature?Water on Earth keeps temperature fluctuations on land and water within limits that permit life.11
1657522106EvaporationTransformation from a liquid to a gas.12
1657522107Heat of VaporizationThe quantity of heat a liquid must absorb for 1 gram of it to be converted from a liquid to a gas.13
1657522108Why does ice floatIt is less dense than water.14
1657522109SolventDissolving agent15
1657522110SoluteSubstance dissolved16
1657522111Solutionliquid that is completely a homogeneous mixture of two or ore substances17
1657522112Why is water such a fine solventIt is versatile because of its polarity. It can dissolve almost any molecule.18
1657522113HydrophobicRepel water. Non ionic and non polar.19
1657522114HydrophilicLikes water whether polar or ionic20
1657522115Two ions when water dissociatesHydroxide ion (-OH), hydronium (H30+)21
1657522116Acidincreases hydrogen ion concentration22
1657522117BaseReduces hydrogen ion concentration23
1657522118How do buffers moderate pH change?They accept hydrogen ions from the solution when they are in excess and donating hydrogen ions to the solution when they have depleted.24

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