Covers 75% of the surface of Earth.
  Single most common compound in most
living things.
  Unlike most substances water expands as it
freezes.
  Water is a polar molecule.
 
Although water is a neutral molecule, one
side is more positive and the other side is
more negative.
  The oxygen atoms have more protons than
the hydrogen atoms so the electrons are
more attracted to the oxygen side.
  A water molecule is polar because of the
uneven distribution of electrons between the
oxygen and hydrogen atoms.
 
 
Because of the partial negative and partial
positive charge water molecules can attract
each other.
An attraction between molecules of the same
substance.
  Water can form up to 4 hydrogen bonds with
other water molecules which gives it cohesive
properties.
 
An attraction between molecules of different
substances.
  The reason you read a graduated cylinder
from the bottom of the curve.
 
Mixture: a material composed of two or more
elements or compounds that are physically
mixed together but not chemically combined.
  Solutions and suspensions are two types of
mixtures that can happen with water.
 
All components are evenly distributed
throughout the solution.
  With salt water, salt is the solute (the
substance dissolved) and water is the solvent
(the substance that does the dissolving).
 
Mixtures of water and non-dissolved
particles.
  Occurs when what is mixed with water is not
a polar molecule.
