AP BIO PRACTICE EXAM 1 EVALUATION
FULL SOLUTION UPDATED STUDY GUIDE
⩥ polar covalent bonds.
Answer: -opposite ends of the molecule have opposite charges
⩥ cohesion.
Answer: -H bonding between H2O creates it (sticky)
-allows for the movement of water against gravity
-high surface tension
-water moves up a tree by transpiration (helped by ____)
⩥ adhesion.
Answer: -H2O molecules form H bonds with other substances
~capillary action
~meniscus
~water climbs up fiber
⩥ solvent.
Answer: -water is the universal one
,-polar water molecules will surround the (+) and (-) ions causing
the ions to separate and dissolve
-dissolve solutes and create aqueous solutions
⩥ hydrophilic.
Answer: -some molecules have an affinity for water
-polar and ionic molecules
-ex: cotton, cellulose, paper
⩥ hydrophobic.
Answer: -some substances do not have an affinity for water
-nonpolar and non ionic substances
-ex: fat, glycerol, oils
⩥ floats.
Answer: -less dense when it is solid, water ______
-forms crystal lattice structure
-important because oceans and lakes do not freeze solid
~insulates water below
~seasonal turnover of lakes
, ⩥ specific heat.
Answer: -the amount of heat that must be absorbed or lost for 1g
to change its temperature by 1C
-water had high _____ due to H bonding
-resists change in temp
-moderates temp on earth
⩥ evaporative cooling.
Answer: -organisms use to regulate their temperature
-ex: sweating
-water evaporates through a surface, cooling occurs
⩥ acidic.
Answer: If [H+]>[-OH]
⩥ basic.
Answer: If [-OH]>[H+]
⩥ pH scale.
FULL SOLUTION UPDATED STUDY GUIDE
⩥ polar covalent bonds.
Answer: -opposite ends of the molecule have opposite charges
⩥ cohesion.
Answer: -H bonding between H2O creates it (sticky)
-allows for the movement of water against gravity
-high surface tension
-water moves up a tree by transpiration (helped by ____)
⩥ adhesion.
Answer: -H2O molecules form H bonds with other substances
~capillary action
~meniscus
~water climbs up fiber
⩥ solvent.
Answer: -water is the universal one
,-polar water molecules will surround the (+) and (-) ions causing
the ions to separate and dissolve
-dissolve solutes and create aqueous solutions
⩥ hydrophilic.
Answer: -some molecules have an affinity for water
-polar and ionic molecules
-ex: cotton, cellulose, paper
⩥ hydrophobic.
Answer: -some substances do not have an affinity for water
-nonpolar and non ionic substances
-ex: fat, glycerol, oils
⩥ floats.
Answer: -less dense when it is solid, water ______
-forms crystal lattice structure
-important because oceans and lakes do not freeze solid
~insulates water below
~seasonal turnover of lakes
, ⩥ specific heat.
Answer: -the amount of heat that must be absorbed or lost for 1g
to change its temperature by 1C
-water had high _____ due to H bonding
-resists change in temp
-moderates temp on earth
⩥ evaporative cooling.
Answer: -organisms use to regulate their temperature
-ex: sweating
-water evaporates through a surface, cooling occurs
⩥ acidic.
Answer: If [H+]>[-OH]
⩥ basic.
Answer: If [-OH]>[H+]
⩥ pH scale.
