### structure:

Soil structure
* act like lungs, providing a range of pore sizes for the gas exchange to take place.
* affects how quickly water moves through soil.
* can begin to come back within days as the bacteria and fungi grow
* describes the way the sand, silt and clay particles are clumped together.
* has a primary impact on soil porosity and aeration.
* improves with increased organic matter and decreased erosion.
* influences the movement of water and pesticides.
* is classified as sandy, clay or loam
  - by the shape and size of soil peds
* is determined by the amount of sand, silt, clay and organic matter the soil contains
  - size and arrangement of soil particles
  - maintained through minimum soil disturbance
  - modified by mycorrhiza fungi and fine root intrusion
  - more important than texture, color or parent material
  - poor and little plant life is found below the canopy
* is the arrangement of soil particles into larger aggregates
  - combination of individual soil particles into aggregates
  - key to a healthy soil
  - very weak and unstable
* refers to the aggregation of the soil particles into large groups or aggregates
* refers to the way in which the soil grains are bound together by colloids into peds
  - individual soil particles are arranged to make up the mass of soil
* vary from gravelly loam to clay and sandy loam.

Spatial structure
* can also matter in predator-prey interactions.
* consists of parcel boundaries, ground use boundaries and class boundaries.

Specialized structure
* allow animals to eat a variety of foods.
* develop as the embryo matures.

Spherical structure
* Most spherical structures contain hereditary materials
* Some spherical structures control growth.

### structure:

Stadium
* are disposable wealth with limited lifespans
  - great engines of economic growth
* are located in cities
  - college towns
  - large cities
* are used for games
  - playing sports
  - running
  - venues.
  * A 'stadium' building in which lots of people may watch an event. They are often used for football and athletics. Some stadiums are paid to add a company name to the name of their stadium. When people do this the company has the 'naming rights' to the stadium. The name of a stadium can change when another company buys the naming rights to that stadium
+ Pipeline: Technology
  * Many stadiums use a central tank for beer. Each bar is served by a pipeline from the central tank.

### structure | stadium:

Ballpark
* are stadiums.
* have a significant impact on real-life games and statistics.

Football stadium
* are also generally the most symmetrical in terms of geometric layout
  - athletic facilities
* is an athletic facility

Stopper
* are playing cards.
* excel as bird attractors because of their small, fleshy fruits.
* includes bases
  - sections

### structure | stopper:

Crime stopper
* Crime Stoppers Unites the public, the media and the police in the fight against crime.
* commmunity program that was formed to help police departments capture criminals.

### structure | storey:

Attic
* Some attics are part of castles
  - houses
  - monasteries
  - palaces
* are great places, as they tend to be dark, dust-free
  - hot in summer and cold in winter
  - human heads
* are located in homes
  - older houses
  - victorian houses
* are part of entablatures
  - places where many spider invasions begin
  - the best places to find antiques people have forgotten about
* are used for boxs
  - storage
  - trunks
  - walls
* can be brutally hot on a summer's day.
* have many cracks and places for air to leak through.
* usually have adequate space to allow application of insulation to save energy dollars.