### crystal:

Ice crystal
* Most ice crystal has sides
  - reflects sunlight
* Some ice crystal falls as rain
  - snow
* Some ice crystal has shapes
  - unique shapes
* Some ice crystal is part of downpours
  - drizzle
  - hails
  - rainstorm
  - sleet
  - snowfall
* are basically hexagonal prisms, like a section of pencil cut square on both ends
  - nuclated by snow, ice fog, and stuff in the water
  - responsible for various atmospheric optics displays
  - so small that they seem to be suspended in air
  - tiny sprinkles that sparkle in the sunshine like diamond dust and hang in the air
* begin to create small punctures in cell walls
  - form a solid lattice with higher cohesion between molecules
* break down flavor and meat texture.
* can cause dispersion
  - grow in cracks of rocks
  - then nucleate, grow, and precipitate
* fall from cold clouds.
* form and disrupt their cellular and molecular structure
  - they grow at the expense of the super cooled water drops
  - beneath the skin and become interspersed among the body's skeletal muscles
  - easily around the bacteria
  - in cells
* form in the skin cells and the rest of the skin remains flexible
  - spaces surrounding the body cells and damage the skin as the cells freeze
  - inside the skin
* grow as thin hexagonal plates or long hexagonal columns, depending on temperature
  - at the expense of cloud droplets until they are large enough to fall
  - on all parts of the crystal
* hang in the air like diamond dust.
* have a single preferred plane of easy deformation, defined by the C-axis
  - very strong plastic anisotropy
  - sharp edges that act like glass
* is crystal
  - part of precipitation
* occur at very low temperatures in a stable atmosphere.
* resist evaporation.
* retard or stop the flow of the refrigerant, causing loss of cooling.
* rupture cell walls.
* serve as a perch for chlorine, which destroys the ozone molecules.
* sparkle in the air, above snow carved into long ridges by the wind.
* turn living organisms, like fruit or vegetables, to mush.

Ice needle
* Some ice needles are part of downpours
* are special varieties of snow or ice crystals.

### crystal | ice:

Black ice
* great hazard for climbers and scramblers.
* happens when it rains and then the temperature falls below freezing.
* is ice which forms on a roadway, usually due to snow melting and re-freezing
  - invisible
  - likely to form first under bridges and overpasses, in shady spots and at intersections
  - more common at night and early in the morning when temperatures are lower
  - most common during the nighttime hours
  - snow melt that has frozen on the asphalt or concrete road surface
* is the cause of some of the most dangerous driving conditions during the winter
  - name given to ice that forms on roadways in one thin, clear sheet
  - weaker than clear ice, which is characteristic earlier in the season
* occurs from condensation when a warm day turns into a cold night.
* tends to form in the early morning and evening.

Crushed ice
* chills drinks faster because more of the ice's surface is exposed.
* consists of small, irregular pieces made by crushing larger chunks of ice.
* is also good for both hydration and nausea
  - broken more finely than cracked ice
  - covered over the bottom of a beaker