AP Bio vocab Units 0 - 1.3

cohesion

water attracts water

adhesion

water attracts other substances

surface tension

elastic film on surface due to cohesion

what does water dissolve

polar and charged substances

water has a …

high specific heat capacity

evaporative cooling

h2o has a high heat of vaporization

• evaporating molecules absorb a lot of heat

dissociation

water molecules regularly switch between h2o and oh + h

ph tolerance

living things have chemical buffers to help prevent ph changes

elements of life

S, C, H, N, O, P,

methyl group

• nonpolar

hydroxyl group

• polar

carboxyl

• polar

amino

• polar

phosphate

• charged

dehydration synthesis

2 mols combined by removing an h ion from one and a oh from the other forming a new h2o mol

polymers are made of

monomers

polymerization

the connection of many molecules

• occurs using dehydration synthesis

hydrolysis

covalent bonds btwn monomers are broken by adding water which adds a h ion to one side and oh to the other (reverse dehydration synth)

neg cont grp

no treatment

• known neg result expected

pos cont grp

gets treatment w/ known result