### water:

Liquid water
* Most liquid water becomes ice
  - supports life
* Some liquid water absorbs energy.
* Some liquid water becomes vapor
  - water vapor
  - has skin
* Some liquid water turns to ice
  - solid ice
* accounts for two-thirds of our body weight.
* acts as a UV shield, protecting potential organisms from UV irradiation.
* appears to be the critical ingredient for the development and sustenance of life.
* becomes a gas through evaporation , when subjected to heating
* boils to give water vapor, which gas.
* can dissolve a variety of compounds.
* consists of many closely packed water molecules arranged in a haphazard manner
  - molecules that move relative to one another
* contains water molecules stuck together.
* covers most of the surface of our planet.
* disordered network of such bonded waters.
* dissolves a wide range of substances.
* expands rather than contracts when it freezes
* falls as rain or drizzle.
* freezes and becomes solid ice when the molecules lose energy.
* gains heat energy and turns into water vapor.
* has a higher entropy than ice, because it is disordered
  - less hydrogen bonds which are continually forming and breaking
  - the observable property of surface tension
* highly dynamic substance.
* holds a huge amount of heat energy and resists changes of state to solid or gas.
* is abundant on earth because the boiling point is rare on earth's surface
  - actually quite rare in the universe
  - also responsible for most of the erosion and weathering of Earth's continents
  - blue for the same reason
  - both a resource and lifeblood
  - coffee's worst enemy during storage
* is considered a prerequisite for life
  - an essential ingredient for life
  - converted to water vapor during evaporation
  - eddential for all known biology
* is essential for biological systems for many reasons
  - life on earth and is the most probable solvent for life elsewhere
* is found in many places
  - oceans, lakes, ponds, rivers, streams, as well as in the ground
  - in a lower energy state than water vapor
  - necessary for almost all living things
  - of vital importance in chemistry and biology
  - one of the principal agents of weathering
  - only possible if the temperature and pressure are high enough
* is the essential ingredient for life on Mars
  - key ingredient for supporting life
  - main factor for life
  - most important single substance for life on earth
  - substance perhaps most readily associated with erosion
* is thought to be necessary for life
  - exist beneath the ice because of internal heat
  - ubiquitous on Earth
  - wet and fluid
  - wets
* is, in a way, the operational definition for life.
* means moderate temperatures
  - there had to have been more of an atmosphere than there is on Mars now
* measure of water present in canopies.
* occurs naturally in air lines as a result of compression.
* seems to be the one element needed for the equation of life on Mars.
* universal solvent.

Living water
* complete water cleansing system.
* is the result of Torah learning.

Main
* are bodies of water
  - part of infrastructures
  - pipes
* is water

Meltwater
* are water.
* flow to the Arctic, Atlantic and Pacific oceans.

### water | meltwater:

Glacial meltwater
* carry sand and gravel from the glacier.
* is funneled away from the glacier in a partially buried river valley.

Metabolic water
* comes from combination of hydrogen and oxygen at end of electron transport chain.
* is derived from cellular oxidation
  - water produced from the metabolism of nutrients in the body

Municipal water
* has chlorine, an acid.
* is generally soft due to the lack of minerals from filtration.