### surface:

Curved surface
* can also act as mirrors
  - be very difficult to shape in wood
* have to be approximated by polygon meshes using tessellation algorithms.

Dark surface
* absorb radiation more than light ones.
* can collect more heat than light surfaces.

Different surface
* differ in structure.
* hold different amounts of water and absorb water at different rates.
* reflect light differing in brightness levels.

Equipotential surface
* are always perpendicular to the electric field at any given point.
* can be bent into varied shapes.

### surface:

Floor
* Some floor drains go directly to a storm sewer or open body of water
  - stripping products affect indoor air quality
* are control
  - flats
  - gathering
  - halls
  - hardwood floors
  - lands
  - light wood in living areas
* are located in airports
  - beds
  - buses
  - carpets
  - classrooms
  - closets
  - desks
  - houses
  - libraries
  - restaurants
  - schools
  - stores
  - synagogues
  - tables
* are made of concrete
* are part of buildings
  - caves
  - exchanges
  - hallways
  - lakes
  - rights
  - structures
  - tileds
  - used for walking
  - walls
  - wets
* can have dry areas and damp areas, including some damp areas that never dry out.
* create layers.
* drains allow drainage from the floor into the sewer.
* have ancient wood
  - hard surfaces
  - live rooms
* includes sections.
* prevent erosion
  - surface erosion
* sanding equipment is heavy duty, industrial machinery.

### surface | floor:

Concrete floor
* are more alkaline than walls.
* can be cold and damp, causing chilling and pneumonia in newborn lambs.
* have surfaces.
* hold heat very well , but can take a long time to absorb the heat.
+ Radiant heating, Types of Radiant Heating, Underfloor heating, Underfloor installation: Construction :: Heat
  * Underfloor radiant heating systems can be installed as either wet or dry systems. Wet systems are laid down and then concrete is poured over them. Concrete floors hold heat very well, but can take a long time to absorb the heat. Dry systems run in open air space between the foundation and the floor, but can be less efficient because they have to heat the air too. However, dry systems are much easier to reach if the system breaks or leaks.

Dirt floor
* are common in highlands houses.
* can be hard to sweep, and often get dry, dusty or muddy.

First floor
* are located in tall buildings.
* are used for entrances
  - families
  - garages
  - hotel lobbies
* have live rooms

Forest floor
* Most forest floors are made up of ferns and mosses.
* Most forest floors prevent erosion
* Some forest floors attract insects.
* Some forest floors have high water
  - illumination
* are major composting centers every fall when the leaves pile up.
* contains decomposing leaves, animal droppings, and dead trees.

Ground floor
* are beginnings
* are located in brownstones
  - hotels
  - office buildings
* are used for cleaning
  - livings

Pelvic floor
* exercise The muscles that form the pelvic floor play a vital role in providing support.
* exercises benefit both types of incontinence.

Shop floor
* are part of factories.
* is work

Wood floor
* are easier to clean than rugs or carpets
  - high maintenance in a home
* catch less dust and dirt than carpets.

Grind surface
* look like molar surfaces
* radiate heat.

Hard surface
* Refers to the impermeable ground surface beneath the drip line.
* can cause errors in precipitation measurements due to splash-in.
* come in many forms.
* reflect sound.