AP Biology Unit 1 Test Exam
Questions with Complete
Solutions
User [Date] [Course title]
, water - Correct Answer: -polar molecule
-polar colvalent bonds
-oxygen end is partial negative and the hydrogens have a partially positive end
-cohesive
polar covalent bonds - Correct Answer: -opposite ends of the molecule have opposite charges
cohesion - Correct 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 - Correct Answer: -H2O molecules form H bonds with other substances
~capillary action
~meniscus
~water climbs up fiber
solvent - Correct 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 - Correct Answer: -some molecules have an affinity for water
-polar and ionic molecules
-ex: cotton, cellulose, paper
hydrophobic - Correct Answer: -some substances do not have an affinity for water
-nonpolar and non ionic substances
-ex: fat, glycerol, oils
Questions with Complete
Solutions
User [Date] [Course title]
, water - Correct Answer: -polar molecule
-polar colvalent bonds
-oxygen end is partial negative and the hydrogens have a partially positive end
-cohesive
polar covalent bonds - Correct Answer: -opposite ends of the molecule have opposite charges
cohesion - Correct 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 - Correct Answer: -H2O molecules form H bonds with other substances
~capillary action
~meniscus
~water climbs up fiber
solvent - Correct 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 - Correct Answer: -some molecules have an affinity for water
-polar and ionic molecules
-ex: cotton, cellulose, paper
hydrophobic - Correct Answer: -some substances do not have an affinity for water
-nonpolar and non ionic substances
-ex: fat, glycerol, oils
