### natural guard dogs:

German shepherd
* Most german shepherds thrive on balance diets
* Some german shepherds have coats.
* Some german shepherds have double coats
  - layer coats
  - lose weight
* are natural guard dogs
  - prolific shedders
  - very prone to degenerative myelopathy
* can be police dogs.
* have reputations.
* suffer from problems.

### natural instinct:

Self preservation
* is an issue, including the preservation of some of our hard earned rights
  - still the dominant law of nature
* is the first law of life
  - nations, as it is of individuals
* natural instinct.

### natural phenomena:

Beach erosion
* Most beach erosion threatens habitats
  - nest habitats
* increases because of the lower volume of sand in the dune directly behind the beach.
* is erosion.
* natural phenomena.
* occur in areas adjacent to the beach.
* reduction in the amount of sand a particular beach has.
* serious, economic impact of wave action.
* threatens prefer habitats

Natural phenomenon
* Many natural phenomena involve a random distribution of points in space.
* Many natural phenomena occur in a manner that minimizes energy or other quantities
  - cycles
* Most natural phenomena arise from forces
  - occur in regions
  - require an input of energy, which is then changed to some other form
* Natural phenomena alter outcomes.
* Natural phenomena are recurrent, predictable, governed by natural law
  - teleological, i.e. they have rational ends within the cosmos
  - display a wide variety of similarities and differences
  - involving electomagnetic fields include light, radio waves, TV signals
* Some natural phenomena are caused by gases
  - presence
  - involve plants
* Some natural phenomena occur under certain circumstances
* are phenomenons.

### natural phenomenon:

Alluvial fan
* are common in arid environments
  - delta shaped deposits of sediment that form at the base of a hill or mountain
  - fan-shaped deposits formed at the base of mountains
  - gravel deposits that wash down from the mountains over time
  - natural things
* natural phenomenon

Alpha wave
* appear primarily in the absence of visual processing and other intense mental processes.
* are the brain wave patterns associated with relaxation with enhanced awareness.

Alternation of generations
* describes the life cycle of plants.
* is another in- dication of an advanced position in the plant world
  - seen in all land plants, which are descendants of green algae
* means plants have multicellular haploid and multicellular diploid forms.
* occurs between diploid and haploid generations
  - in almost all marine algae
* refers to cycling between haploid to diploid generations
  - the two main phases in the life history of plants

Annual ring
* appear as irregular bands of light and dark streaks or patches.
* are well-suited for the determination of the trees' ages.
* occur when the temperature drops and the sap in the tree fails to rise.

### natural phenomenon:

Brain wave
* are a reflection of central functions of the brain, as well as states of consciousness
  - but a symptom of the process, whereby the brain, as an organ, hums to itself
  - different from hypnosis and sleep
  - electrical
  - frequencies of electrical energy that the brain produces
  - large and slow, rather like mountains
  - like radio waves
* are slow and become almost coma-like
  - low-voltage
  - the voltage patterns generated by the brain
* arise from synchronized neural activity.
* become abnormal when the brain is damaged or the function disturbed.
* begin as early as forty days.
* change frequencies based on neural activity within the brain.
* look like the waking pattern.
* occur at various frequencies, that is, some are quick, some quite slow.
* play a role, too.
* tend to decline.