AP Bio Unit 1 Water Flashcards
polar
molecule w partial charges
mixes w water
nonpolar
no partial charges
doesn’t mix w water
electronegativity
attraction of an atom for electrons in a covalent bond
cohesion
water molecules sticking to each other
adhesion
water molecules sticking to each other
heat capacity/specific heat
the amount of thermal energy that must be absorbed or lost to change the temp of a substance of object by 1oc
surface tension
an inward force that tends to minimize the surface area of a liquid, causes the surface to behave as if it were a thin skin
hydrophobic
insoluble in water
water fearing
nonpolar
repels water
hydrophilic
having a tendency to mix with, dissolve in, or be wetted by water
attracted to water
covalent bonds
bonds created by sharing electrons w other atoms
ionic bonds
bonds between atoms that form by transferring electrons
hydrogen bonds
very weak bonds
occurs when a hydrogen atom in one molecule is attracted to the electrostatic molecule in another molecule
polar covalent bond
a covalent bond between atoms that differ in electronegativity
the shared electrons are pulled closer to the more electronegative atoms, making it slightly negative and the other atom slightly positive
ions
charged atoms
transpiration
the process where water is lost through a plants leaves
