AP Biology Unit 1 Test (Study guide for AP
junior year in high school) Expert Strategies, Review of
Key Quizzes, and Practice Questions for Guaranteed
Success / Newest 2025/2026.
Terms in this set (86)
-polar molecule
-polar colvalent bonds
water -oxygen end is partial negative and the
hydrogens have a partially positive end
-cohesive
polar covalent bonds -opposite ends of the molecule have opposite
charges
-H bonding between H2O creates it (sticky)
-allows for the movement of water against gravity
cohesion -high surface tension
-water moves up a tree by transpiration (helped
by ____)
-H2O molecules form H bonds with
other substances ~capillary action
adhesion
~meniscus
~water climbs up fiber
-water is the universal one
-polar water molecules will surround the (+) and
solvent
(-) ions causing the ions to separate and dissolve
-dissolve solutes and create aqueous solutions
, -some molecules have an affinity for water
hydrophilic -polar and ionic molecules
-ex: cotton, cellulose, paper
hydrophobic
-some substances do not have an affinity for
water
-nonpolar and non ionic substances
-ex: fat, glycerol, oils
floats
-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
-the amount of heat that must be absorbed or
lost for 1g to change its temperature by 1C
specific heat -water had high _____ due to H bonding
-resists change in temp
-moderates temp on earth
evaporative cooling
-organisms use to regulate their temperature
-ex: sweating
-water evaporates through a surface, cooling
occurs
acidic If [H+]>[-OH]
basic If [-OH]>[H+]
pH scale
-how acidic or basic a solution is
-pure water, only 1 molecule in every 554 million
is dissociated
-most biological fluids have 6-8
-each unit represents a 10-fold difference in H+
and -OH concentrations
neutral -If concentration of 2 ions is equal
junior year in high school) Expert Strategies, Review of
Key Quizzes, and Practice Questions for Guaranteed
Success / Newest 2025/2026.
Terms in this set (86)
-polar molecule
-polar colvalent bonds
water -oxygen end is partial negative and the
hydrogens have a partially positive end
-cohesive
polar covalent bonds -opposite ends of the molecule have opposite
charges
-H bonding between H2O creates it (sticky)
-allows for the movement of water against gravity
cohesion -high surface tension
-water moves up a tree by transpiration (helped
by ____)
-H2O molecules form H bonds with
other substances ~capillary action
adhesion
~meniscus
~water climbs up fiber
-water is the universal one
-polar water molecules will surround the (+) and
solvent
(-) ions causing the ions to separate and dissolve
-dissolve solutes and create aqueous solutions
, -some molecules have an affinity for water
hydrophilic -polar and ionic molecules
-ex: cotton, cellulose, paper
hydrophobic
-some substances do not have an affinity for
water
-nonpolar and non ionic substances
-ex: fat, glycerol, oils
floats
-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
-the amount of heat that must be absorbed or
lost for 1g to change its temperature by 1C
specific heat -water had high _____ due to H bonding
-resists change in temp
-moderates temp on earth
evaporative cooling
-organisms use to regulate their temperature
-ex: sweating
-water evaporates through a surface, cooling
occurs
acidic If [H+]>[-OH]
basic If [-OH]>[H+]
pH scale
-how acidic or basic a solution is
-pure water, only 1 molecule in every 554 million
is dissociated
-most biological fluids have 6-8
-each unit represents a 10-fold difference in H+
and -OH concentrations
neutral -If concentration of 2 ions is equal
