Glass
* All glass has a tendency to absorb heat when exposed to sunlight.
* All glasses contract the field of vision to a greater or lesser degree
  - show universal properties at low temperatures
* Most glass comes from sand
  - contains impurities
  - does conduct heat
  - etching today is by the sandblasting method
* Most glass fills with clear liquids
* Most glass has conductivity
  - frost appearances
* Most glass has low conductivity
  - thermal conductivity
* Most glass is an insulator when solid
  - chemically stable and at risk primarily from careless handling or accidents
* Most glass is made of hydrate silica
* Most glasses allow some direct sunlight to enter from the top and sides of the frame
  - are insulators
  - contain a metal oxide fused with silica
* Some glass conducts light.
* Some glass contains cold water
  - crystal
  - ice water
  - proteins
  - warm water
  - flasks contain water
  - frogs benefit from light
* Some glass has atomic structures
  - skin
  - is flattened to make windows
  - lowers blood pressure
* Some glass stimulates growth
  - hair growth
  - uses energy
  - glasses help people see things which are near and far away
* are a distraction during games and sports
  - highly important class of industrial material
  - also a fashion accessory
  - essential for many people
  - formulated, melted and characterized to correlate composition and properties
  - light weight and can be worn over prescription glasses
  - like the lens on a camera, and the retina is like the film
  - processed by pouring in a molten state, working into shape while hot, and then cooling
  - the most common solution to correct refractive visual problems
* blocks radiation.
* can be helpful in children as young as six months of age
  - greatly improve incidental learning or learning that takes place by observation
  - improve weakened vision
* containing thorium oxide have a high refractive index and low disper- sion
  - refractive index and low dispersion
* fall into a number of natural groups, for example.
* fog up with changes in temperature.
* form the same kind of bonds as they cool and solidify as they have when they are liquid.
* frequently break or chip because they are washed improperly.
* has appearances
  - refractive indexs
  - sheen
  - tendencies
  - unusual properties
* is amorphous solids
  - capable of melts
  - ceramic
  - cleans
  - coloureds
  - containers
  - disguises
  - empties
  - glassware
  - green
  - inanimate objects
* is located in bars
  - cabinets
  - cases
  - cupboards
  - dining rooms
  - dishwashers
  - drawers
  - hands
  - homes
  - kitchens
  - meetings
  - noses
  - pockets
  - sinks
  - streets
  - tables
* is made of glass
  - minerals
* is part of glass
  - sharps
  - smooths
  - solid objects
* is used for drink water
  - drinking
  - holds
  - reading
  - vehicles
* make fuzzy things come into focus.
* move when tummy is pressed.
* provides high resistance
* reduce the focusing effort and can straighten the eyes.
* transmits light
  - visible light
+ Materials science, Ceramics and glasses
  * Another application of the material sciences is the structures of glass and ceramics, typically associated with the most brittle materials. Ceramics and glasses use covalent bonds and ionic-covalent bonds with SiO2, silica or sand, as a fundamental building block. Ceramics are as soft as clay and as hard as stone and concrete. Usually, they are crystalline in form. Most glasses contain a metal oxide fused with silica. At high temperatures used to prepare glass, the material is a viscous liquid. Glass forms into an amorphous structure when it is cooled. Windowpanes and eyeglasses are important examples. Fibers of glass are also available. Diamond and carbon in its graphite form are considered to be ceramics.