### natural phenomenon | physical phenomenon:

Weather condition
* Most weather conditions affect appearances
  - movement
  - visibility
  - cause events
* Some weather conditions affect humidity.
* Some weather conditions cause disasters
  - natural disasters
* Some weather conditions lead to accidents
  - traffic accidents
* affect all sports, but they affect racing in a different fashion
  - how well deer detect scents
  - people from all walks of life but especially farmers
* affect the amount of pollen and mold spores in the air
  - orange wheat blossom midge life cycle significantly
  - pollen count greatly
* are another factor that affects the color of fall leaves.
* can also distort and affect the appearance of landing lights close to the ground
  - become a problem in winter months, but only for people
  - bring about a frost, even in supposedly frost free areas
  - cause temporary changes in line conditions
* can change dramatically in a short time
  - drastically in a very short period of time
  - quickly during the hunting season
  - rapidly
  - suddenly and the effects of high altitude can be extreme
  - unexpectedly
  - very quickly in mountainous areas and snow is possible year round
  - exacerbate air pollution
* can have adverse effects
* can vary widely and are influenced by the terrain on a diurnal basis
  - from early morning to late evening, or day to day
  - sea conditions to vary significantly
* change from day to day.
* change quickly in mountainous areas and snow is possible year round
  - snow is possible year-round
* combined with terrain affect the mobility of marching troops.
* drive fire behavior, but fires also drive weather conditions.
* have a great effect on the growth of tadpoles
  - water use rate of alfalfa
  - something to do with egg-laying
* influence how long the birds fly and how high they fly
  - the handling characteristics of waste in open-housing systems
* mean nothing to an animal when it s infected with rabies
  - it's infected with rabies
* play a large role in how burning straw or stubble affects others.
* play a major role in controlling the severity of the blight
  - determining whether the space shuttle launches or lands
  - part, both in humidity and soil moisture
  - significant role in hunter success rates
  - an integral role in the outcome of each wildflower season
* promote development.
* vary the distance that sound travels.

### natural phenomenon:

Spontaneous generation
* is the belief that living things can arise from non-living material
  - supposed origin of living things from nonliving things
  - when something like a fly grows from a small speck of smelly meat
* refers to living cells arising only from other living cells.
* see abiogenesis.
+ Germ theory of disease: Microbiology :: Medicine
  * One problem with the old theories of disease was that people believed that things spontaneously generated. Spontaneous generation is when something like a fly grows from a small speck of smelly meat. That old theory is called abiogenesis. Prior to this, people thought that maggots came from rotting meat. He discovered this by sealing some meat in a jar and watching it. No maggots were found on the sealed meat. He also put some meat in a jar and covered it with gauze.

Theta wave
* are arousal waves in the brain
  - somewhat uncommon and fall between alpha and delta waves
* represent rhythmic slow activity.

### natural processes:

Coastal hazard
* Most coastal hazards are natural processes.
* can include high tides and flash floods caused by storm surges.
* force commercial vessels to moor some way offshore.